JP2004038326A - Production plan creating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and accurately create a production plan, when executing the production plan from a plurality of information processing terminals to create the production plan. <P>SOLUTION: The plurality of information processing terminals are accessably connected to a production plan creating part, each information processing terminal logs in the production planning as a name of a chief operator or an operator in charge. The chief operator can compile the production plans of all the processes and simulate them while another operator in charge executes the production planning. The operator in charge can compile the production plan of a preset process when the chief operator does not execute the production planning and simultaneously compile the production plan in different processes. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a production plan creation system for creating a production plan in a case where products are sequentially produced by a plurality of production facilities constituting a plurality of production processes of a steel product or the like.
[0002]
[Prior art]
For example, in industries that produce tens of thousands of products per month, such as steel products, the company responds to customer orders that differ from one product to another, such as product types and dimensions, such as steel grades. In order to complete the process, a rough production plan, such as a monthly unit, is created using a computer together with the work-in-progress and the newly manufactured product.
[0003]
2. Description of the Related Art As a conventional production plan creation device, for example, a device described in Japanese Patent Application Laid-Open No. 10-268909 is known.
In this conventional example, a storage unit 120 that stores a correspondence relationship that defines one operator who is permitted to perform schedule adjustment for each process is provided, and when the operator adjusts the schedule, adjustment is performed according to the correspondence relationship. Adjustment processing means for storing the schedules of the respective processes in the storage unit 160 to the extent that it is recognized that the process has been performed, so that the operator can adjust only the schedules of the respective processes defined in the correspondence relationship; The schedule of each process updated and stored in 160 is corrected by the time alignment processing means so as to ensure temporal consistency between the processes, and the schedule of each corrected process is updated in the storage unit 70. There is disclosed a scheduling system that stores the information.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional scheduling system, one operator who is permitted to perform schedule adjustment for each process is determined, and this correspondence is stored, and it is recognized that the operator performs adjustment according to the correspondence. It is possible to adjust only the schedule of each process for the given amount. According to this, there is a problem in that the operator defined for each process adjusts the schedule in parallel, so that temporal consistency between the processes may not be obtained.
[0005]
In other words, when each operator individually adjusts all schedules including cycle calendar editing and stacking, the cycle calendar editing may cause loss of cycle chances in the upstream or downstream processes, or new work in progress. Since a pile of goods may affect the production plan of the downstream process, it is necessary to verify the schedule adjustment results of each operator by all operators, and there is a problem that the production plan creation work becomes complicated. .
[0006]
Accordingly, the present invention has been made to solve the problems of the conventional example described above, and the entire production plan can be easily and quickly reduced by providing a restriction on a production plan creation function that can be used for each operator. It is intended to provide a production plan creation system that can create a production plan.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a production plan creation system according to claim 1 is a production plan creation system that creates a production plan in a case where products are sequentially produced by a plurality of production facilities constituting a plurality of manufacturing processes. A cycle calendar management means for creating and editing a cycle calendar in which the production timing of the product is set in each production facility; and a pile for accumulating a time required for production of the product based on the cycle calendar created by the cycle calendar management means. Means for producing a production plan having at least a landslide means for performing a landscaping of a manufacturing capacity excess process based on the piled result of the pile means, and accessing the production plan creator. A plurality of pieces of information for creating a production plan using the cycle calendar management means, the pile means, and the collapse means. A processing terminal, the production plan creation unit, based on the unique identification information input from the plurality of information processing terminals, the cycle calendar management means, pile means, available means out of the collapse means It is configured to be set.
[0008]
The production plan creation system according to claim 2 is characterized in that, in the invention according to claim 1, the landslide means includes a propagation processing function of reflecting a landslide result in preceding and succeeding processes. I have.
Further, in the production plan creation system according to claim 3, in the invention according to claim 1 or 2, the production plan creation unit is configured to execute the cycle calendar management in addition to the cycle calendar management means, the pile means, and the mountain collapse means. It is characterized by comprising a simulation means having a function equivalent to the means, the pile means, and the collapse means and performing a simulation which is not reflected in the production plan.
[0009]
Still further, in the production plan creation system according to claim 4, the production plan creation unit sets an operator in charge that can handle each of the production opportunities and the cycle chances for each equipment included in the cycle calendar, It is characterized in that only the assigned operator can edit the production order and the cycle chance.
[0010]
Still further, in the production plan creation system according to claim 5, in the invention according to any one of claims 1 to 4, the production plan creation unit edits the cycle calendar management unit, the stacking unit, the pile breaking unit, and the simulation unit. The present invention is characterized in that a general operator mode that can be set by a possible general operator and a responsible operator mode that can edit a hill-sloping means for each equipment can be set.
[0011]
The production plan creation system according to claim 6 is the invention according to claim 5, wherein the production plan creation unit executes the other mode when one of the general operator mode and the assigned operator mode is being executed. Is configured to be prohibited.
Further, in the production plan creation system according to claim 7, in the invention according to claim 5 or 6, the production plan creation unit executes the assigned operator mode of a different facility when the assigned operator mode is executed. Is configured to be allowed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing a schematic configuration of the present invention, in which a host computer 1 and a server 2 composed of, for example, an engineering workstation are connected, and the server 2 is provided for each production process of a steel mill. For example, a plurality of, for example, four information processing terminals 3 </ b> A to 3 </ b> D constituted by personal computers are connected via the local area network 4.
[0013]
The host computer 1 is provided with a series-based order database DB that manages series-based order data. A product order received in the series-based order database DB can be processed by a steel mill at a thick plate order, hot rolling (hot rolling). ) Orders, cold rolling (cold rolling) orders, electromagnetic steel orders, large steel orders, medium steel orders, billet orders, wire rod orders, etc. The current work-in-progress order and the order to be newly manufactured are extracted from the order-by-sequence orders stored in the order file and stored in the order file, and the extracted order-by-sequence order data is transmitted to the server 2.
[0014]
Here, as shown in FIG. 2, the order database DB stores demand order data in which product names, dimensions, quantities, and customer names representing product types such as demand order names, delivery dates, and materials are registered. A demand order registration file 11, a production order association file 12 for storing production order association data representing an association between a demand order name and a production order name, and a conversion of the demand order registration file 11 by the production order association data, as well as a work in process inventory A production order data registration file 13 that stores production order data in which production order names, process order names, product names, dimensions, and quantities are registered by being divided into information units, a production order name, a process name, a pre-process in-process state, In-process inventory information file that stores in-process inventory information with registered quantities, post-process in-process status, quantities, etc. And a 14.
[0015]
By having this work-in-progress stock information, it is prevented that a work-in-progress that can be currently applied to a demand order with a required quantity is newly manufactured. That is, the required production quantity can be determined from the quantity of the work in process and the quantity of the demand order.
The server 2 is provided with a production plan management system 2A that creates a production plan based on the current work-in-progress order and the planned production order transmitted from the host computer 1.
[0016]
Then, the data processing unit 20a provided in the production plan management system 2A refers to the standard table 20b, the process table 20c, and the cycle calendar file 20d, and according to each manufacturing capability of a plurality of manufacturing processes that each product passes. A production plan creation process for creating a production plan is performed, the production plan information is stored in the production plan file 20e, and the production plan information is displayed on the display 20f.
[0017]
In the cycle calendar file 20d, a time that defines an allocation time of a manufacturing chance of a cycle (hereinafter, referred to as a cycle chance) capable of manufacturing one or a plurality of types of products for each manufacturing process is defined for each type of product (cycle). A cycle calendar in which buckets (hereinafter simply referred to as buckets) can be arranged is stored. As shown in FIG. 3, the cycle calendar includes, for example, the rolling (manufacturing) of tinplate in a tandem cold mill TCM, which is a facility for performing cold rolling, from 18:00 on the (i-1) th day to the evening on the ith day. When it is assumed that it is possible until 18:00, a tinplate cycle CY1 is set according to this, and for tinplates of similar types, from 6:00 in the morning on the i-th day to 6:00 in the morning on the i + 1st day When it is assumed that the production is possible between the above, the cycle CY2 of the tinplate is set according to this.
[0018]
Since these cycles CY1 and CY2 are cycles of similar types, it is assumed that they can be combined and a product can be manufactured in the same cycle. Here, a cycle refers to a structural unit of a group of products that are continuous and have a common attribute. In an industry such as the steel industry, which produces tens of thousands of products per month, for example, in the steel industry, it manufactures several products with the same attributes, such as the same kind or material, in succession, and manufactures a group of products with that attribute. This is because, after the completion of the above, in most cases, a manufacturing mode is adopted in which a product group having another attribute is manufactured. This is basically common to every facility in every process with a few exceptions.
[0019]
As described above, even if the attributes such as product types are not exactly the same, if they are similar to some extent, it is a recent trend to adopt a manufacturing mode in which the cycle configuration conditions are relaxed so that the products can be manufactured with the same cycle chance. Therefore, the embodiment described here is in line with it. By the way, the above-mentioned cycle opportunity is, in other words, the time zone in which the product in the target cycle is manufactured in the target process or equipment at what time zone. In consideration of the lead time between multiple processes and multiple processes, as well as the time required for manufacturing in processes and equipment, each cycle opportunity is assigned a time zone so that all products can be delivered in time, so that it can be realized overall. It is this production planning system that makes plans.
[0020]
By the way, in the present invention, a cycle in which the set cycles CY1 and CY2 are once synthesized can be constituted by a bucket BKi of a day unit further divided at a boundary position of a date. Further, it may be constituted by a set of variable-length buckets VBKi1, VBKi2 and VBKi3 divided at the position where the overlapping state of the cycles CY1 and CY2 changes, that is, at 6:00 in the morning on the i-th day and at 18:00 in the evening on the i-th day.
[0021]
By configuring the variable-length buckets VBKi1 to VBKi3 obtained by dividing the bucket BKi for each day at a position where the overlapping state changes in this manner, the variable-length bucket VBKi1 provides a cycle opportunity for tinting in which only tinting can be cold-rolled, The variable-length bucket VBKi2 provides a cycle opportunity for a tinplate and tinplate that can be cold-rolled for both tinplate and tinplate. The variable-length bucket VBKi3 provides a tinplate cycle that allows only the tinplate to be cold-rolled. Opportunity.
[0022]
Then, for each of the formed variable-length buckets VBKi1 to VBKi3, the production time zone of tinplate products A, B, and C, which are actually scheduled to be cold-rolled, and the production of tinplate original plate products D, E, and F When the time zones are allocated, as shown in FIG. 3, the variable length bucket VBKi1 is subjected to the cold rolling of Tinplate B, and the variable length bucket VBKi2 is subjected to the cold rolling of Tinplate C and Tinplate D. Cold rolling of the tinplate E is assigned to each of the buckets VBKi3.
[0023]
In this way, by performing the cold rolling allocation to each of the variable-length buckets VBKi1 to VBKi3, the filling rate Fi1 to Fi3 of each of the variable-length buckets VBKi1 to VBKi3 is changed in the time zone of each of the variable-length buckets VBKi1 to VBKi3. If the lengths are TSi1 to TSi3, respectively, they can be represented by the following equations (1) to (3).
Fi1 = TB / TSi1 × 100 (%) (1)
Fi2 = (TC + TD) / TSi2 × 100 (%) (2)
Fi3 = TE / TSi3 × 100 (%) (3)
Here, TB, TC, TD, and TE are the times (hr) required for the cold rolling of the products B, C, D, and E, respectively.
[0024]
The filling rate Fi0 of the bucket BKi per day can be represented by the following equation (4).
Fi0 = (TB + TC + TD + TE) / 24 (4)
Then, based on the filling rate Fi0 of the bucket BKi and the filling rates Fi1 to Fi3 of the variable-length buckets VBKi1 to VBKi3 on a daily basis, it is accurately verified whether or not the production capacity of the facility (hereinafter, referred to as facility capacity) does not exceed. Can be done.
[0025]
That is, when any one of the filling rates Fi0, Fi1 to Fi3 of the buckets BKi, VBKi1 to VBKi3 exceeds 100%, it means that a time zone in which the facility capacity is exceeded occurs. In some cases, this indicates a full operation state, and when the filling rate is less than 100%, it means that there is still room for equipment capacity.
[0026]
In this way, the cycle calendar shown in FIG. 4 is created by sequentially allocating the cycle chances of various product types for each facility in each process to each variable length bucket. In FIG. 4, it is preferable that each variable-length bucket be accompanied by a cycle type name indicating the type of the product corresponding to the cycle. It may be omitted.
[0027]
Here, it is preferable that the cycle calendar is displayed in two stages when variable-length buckets VBK constituting the bucket BK in one-day units are continuous. Are preferably divided into different stages and displayed in parallel. Then, when a production order is assigned to a target cycle of the variable-length bucket VBK in a stacking process described later, a filling rate is calculated for each variable-length bucket, and if the filling rate exceeds 100%, the variable-length bucket is changed. Solid display is performed, and when it is less than 100%, hatching display is performed according to the filling rate. The process of exceeding the production capacity exceeding the filling rate of 100% (operating rate of 100% for equipment) is easily grasped and described later. This is preferable because a landslide treatment can be performed.
[0028]
Further, in each of the information processing terminals 3A to 3D, a login name and a password are input to log in to the server 2, and the data operation processing unit 20a of the production plan management system 24 is accessed to perform the production plan creation processing shown in FIG. Execute
In this production plan creation process, as shown in FIG. 5, first, in step S0, a login screen for inputting a login name and password is displayed on the display 3b, and when the login name and password are input, the process proceeds to step S1. It is determined whether or not the login name is for the general operator. If the login name is a preset general operator login name, the process proceeds to step S2, and the execution mode for creating a production plan is selected by a processing menu (not shown). If the reference mode is selected instead of the execution mode, the process proceeds to step S3, and the cycle calendar stored in the cycle calendar file 20d or the production calendar stored in the production plan file 20e is determined. After the plan information is displayed on the display 3b, the process proceeds to step S11 described later. And, it proceeds to step S4 when the execution mode is selected.
[0029]
In this step S4, it is determined whether or not the operator in charge logs in the other information processing terminal and the production planning process is being executed. When the operator in charge is not logged in or logs in, the production planning process is executed. If not, it is determined that the operation mode is the general operator mode, and the process proceeds to step S5, where it is determined whether or not the stacking process is selected on a process menu screen (not shown). If the stacking process is selected, the process proceeds to step S6. Transition.
[0030]
In this step S6, the order of the thick plate, the order of the hot rolling (hot rolling), the order of the cold rolling (cold rolling), the order of the electromagnetic steel, the order of the large steel, and the order of the medium steel are obtained from the order database DB for each series of the host computer 1. , The in-process order and the new order of the products stored in the order files F1 to F8 are categorized into billet orders, wire bar orders and the like. As shown in FIG. 2, the product name, dimensions, quantity, and delivery date are set in the production order as described above. The delivery date is the number of days required for transportation, for example, in the case of shipping to a customer by ship. Is preferably calculated in consideration of the shipping timing and the like by ship.
[0031]
Next, the process proceeds to step S7, where the standard obtained by referring to the standard table 20b based on the product name and dimensions of each production order, and the passing process with reference to the process table 20c based on the standard, are executed. decide. Here, as shown in FIG. 6, the process table registers a component data definition file 21 in which specifications, quantities, process orders, material names, and quantities are registered, and a component name (raw materials) and a component type (purchased products). A part list definition file 22, a process order, a process name, a facility name (specific passing facility name of the corresponding process), a manufacturing process order list file 23 in which a required time is registered, and a relationship between the facility and the installation location are registered. An equipment list definition file 25 in which the order of the process, the process name, the equipment name, and the required time (time ratio to the required time required to pass the equipment that is supposed to pass) are registered; A cycle process order setting definition file 26 in which the order, the process name, and the cycle name indicating the product type are registered, and a process for registering the correspondence between the product type corresponding to the cycle name and the equipment through which the product can pass. And a Le facilities set definition file 27.
[0032]
Then, for each manufacturing order, a passing step, that is, a manufacturing step to pass, and a passing order to pass through the manufacturing steps are obtained with reference to the manufacturing step order list file 23 (for example, in FIG. 6, the step order is indicated by AAAA). Each of the components passes through each process in the order of → CC → HM → PIC → CM → CAL. BF → CC_4 → HM → 5PIC → CM_1 → CAL_2.
[0033]
By having the alternative equipment setting definition file 25, it is possible to determine whether or not transfer to another alternative equipment is possible when production is concentrated on a specific process.
Further, by having a cycle equipment setting definition file 27 in which the correspondence between the type of the product corresponding to the cycle name and the equipment name (for example, shaped steel, plated COAT, etc.) through which the product can pass, is registered by the pile collapse method. When creating a production plan by accumulating the required manufacturing time for each facility and each process, by referring to the required time registered in the manufacturing process order list file 23, the production capacity for each facility and each process is determined. It is possible to determine whether or not the upper limit is exceeded, so that a production plan with high accuracy can be created.
[0034]
By the way, a cycle is often named, for example, once every few days, because a cycle of a cycle of the same product type is periodically provided.
Here, returning to FIG. 5 again, the process proceeds to step S8, and the production time required in each process is previously determined by referring to the process table 20c based on the passing process for each production order, and separately from the same process table. In addition to reading out the shortest product transfer time between processes (not shown) fixedly set in 20c, some cycle chances of the corresponding product type in the cycle calendar are read out from the cycle calendar file 20d, and any one of them is manufactured. On the premise of manufacturing with a chance, for example, calculate a reference time such as the earliest possible manufacturing start time in the process of the manufacturing order, and based on this reference time, the shortest lead time for each manufacturing order from the delivery date A cycle in which the timing of passing through each passing step is accumulated by going back and counting in reverse order to the passing step order, as shown in FIG. Seek a constant line. Here, the lead time is a general term for the time required for manufacturing each product in each process, the time required for transporting between processes, or the total or cumulative time required.
[0035]
Next, the process proceeds to step S9, and as shown in FIG. 8, which will be described later, based on the cycle setting line obtained in step S8, for each process, for example, on a daily basis, the production time required for each production order to be passed is calculated. A stacking process is performed (a cycle of a plurality of product types may be separately and continuously scheduled during the day). In the present invention, in the stacking process, referring to the process table 20c, the shortest product transfer time between each process and the cooling time to the predetermined temperature after the completion of hot rolling based on the passing process for each production order. The shortest lead time that represents the minimum physical time required to transport products such as, for example, after completion of hot rolling, the product type that needs to start pickling within a predetermined time, etc. In such a case, the predetermined time is exceeded, and when there is no facility that can temporarily exceed the heat retention or the like, the longest lead time is read, and a cycle chance is searched according to the arrangement of these lead times.
[0036]
Next, the process proceeds to step S10, where the stacking result is stored in the production plan file 20e, and then the process proceeds to step S11, where it is determined whether the end key or the end button is selected, and the production plan creation process ends. It is determined whether or not the end key or the end button is selected, and the process returns to the step S1. If the end key or the end button is selected, the production plan creation processing is ended.
[0037]
If the result of the determination in step S5 is that the pile-up process has not been selected, the process proceeds to step S12, where it is determined whether or not the mountain-cut process has been selected on a process menu screen (not shown). If so, the process proceeds to step S13 to read the piled-up result from the production plan file 20e, and to determine whether there is a production capacity excess process exceeding 100% in the operation rate for each process obtained in the above-mentioned piled-up process ( In the case of the aforementioned one-day unit, it is determined whether or not there is a process in which the total required manufacturing time exceeds 24 hours), and if there is no manufacturing capacity excess process, the process proceeds to step S16 to be described later. If there is a manufacturing capacity excess process, the process proceeds to step S14.
[0038]
In this step S14, as shown in FIG. 10 to be described later, an adjustment process called a mountain crush is automatically performed for the manufacturing capacity excess process. This landslide refers to another cycle of the same product type, such as using another alternative equipment of the same process for the production order causing the excess of the production capacity or making the production timing in the process one earlier or one later. This is to create a production plan corrected by leveling so that the operation rate of the production capacity excess process becomes 100% or less by adjusting to shift to a chance.
[0039]
Next, the process proceeds to step S15, where a pile-up process for accumulating the required production time for each process is performed again by reflecting the corrected production plan for each production order after the landslide, and then the process returns to step S13.
If the result of the determination in step S13 is that there is no production capacity excess process, the process proceeds to step S16, where the landslide result is stored in the production plan file 20e, and then the process proceeds to step S11.
[0040]
If the result of the determination in the step S12 is that the landslide process has not been selected, the process proceeds to the step S17 to determine whether or not the cycle calendar editing process has been selected on a process menu screen (not shown). If the cycle calendar editing process has been selected, the process proceeds to step S18, and after executing the cycle calendar editing process shown in FIG. 15 described later, the process proceeds to step S11.
[0041]
Further, if the result of the determination in step S17 is that the cycle calendar editing process has not been selected, the process proceeds to step S19, where it is determined whether or not the simulation process has been selected on a process menu screen (not shown). If there is, the process proceeds to step S20, where the production plan information stored in the production plan file 20e is read out, and a production plan simulation process is performed based on the production plan information. In this simulation processing, based on the production plan information, a new production order is piled up, crushed, a cycle calendar is edited, etc. to simulate the production plan, and the simulation result can be stored. However, it is prohibited to reflect the simulation result in the production plan information stored in the production plan file 20e.
[0042]
On the other hand, when the result of the determination in step S1 is that the login name is not for the general operator, the process proceeds to step S22, and when the login name is a preset operator login name, the process proceeds to step S23. It is determined whether or not the execution mode has been selected on the screen. If the execution mode has not been selected, it is determined that the reference mode has been selected, and the process proceeds to step S24, where the production plan information is obtained from the production plan file 20e. Is read out and displayed on the display 3b, and then the flow shifts to the step S11. When the execution mode is selected, the flow shifts to the step S25.
[0043]
In this step S25, it is determined whether or not the general operator logs in the other information processing apparatus and the production planning process is being executed. If the general operator is not logged in or is logged in, the production planning process is performed. Is not being executed, it is determined that the mode is the assigned operator mode, and the routine goes to Step S26.
In this step S26, it is determined whether the landslide process or the cycle calendar editing process is selected. The landslide process of the production order shown in FIG. 10 is executed. Since different facilities can be collapsed for each operator in charge, production planning can be efficiently performed in a short time.
[0044]
Next, the process proceeds to step S27a, where the propagation process shown in FIG. 11 for propagating the landslide result to the upstream process and the downstream process is executed, and then the process proceeds to step S11.
If the result of the determination in step S26 indicates that the cycle calendar editing process has been selected, the process proceeds to step S27b, and after performing the cycle calendar editing process (real-time adjustment of cycle chance) in FIGS. 14 and 15 described later, The process moves to step S11.
[0045]
Returning to FIG. 5 again, if the result of the determination in step S25 is that the general operator has logged in and the production planning process is being executed, the process proceeds to step S28, where the general operator is in use and sets the execution mode. The execution mode impossible guidance information that cannot be performed is displayed on the display 3b, and then the process proceeds to step S11.
[0046]
Furthermore, when the result of the determination in step S22 is that the login name is not for the operator in charge, the process proceeds to step S29, where guidance information indicating that the login name is not a production planning login name is displayed on the display 3b, and then the production planning process is performed. finish.
In the processing of FIG. 5, the processing of steps S5 to S10 corresponds to a pile-up means, the processing of steps S12 to S15 corresponds to a mountain-falling means, the processing of steps S17 and S18 corresponds to a cycle calendar editing means, The processing of S19 and S20 corresponds to the simulation means.
[0047]
Here, the calculation process of the reference time for determining the passage timing of each step in the above-described step S8 in FIG. 5 will be described in more detail as follows. Here, the reference time is a general term for the earliest possible start time and the latest possible start time described below. As shown in FIG. 7, the horizontal axis indicates time, and the vertical axis indicates continuous casting process CC, hot rolling process HOT, pickling process PIC, cold rolling process COLD, continuous annealing process CAL, plating process COAT, etc., until delivery date. As shown in the chart of the various steps, first, when the operation start point P10 is set in the continuous casting step CC which is the initial step at the calculation start time t1, the hot start which is the downstream step from the operation start point P10 is performed. For the rolling step HOT to the plating step and the like, the earliest possible start time for each step is sequentially set with a preset shortest lead time. By connecting the work start points P10 to P15 indicating the earliest possible start time for each step, a line L1 indicated by a broken line in FIG. 7 can be represented.
[0048]
Then, with respect to the earliest possible start time, a time in which the constraint of the cycle chance of the equipment in the passage process is taken into consideration is set as the constraint taking consideration of the earliest possible start time. That is, as shown in FIG. 7, assuming that the cycle chance C31 represented by a rectangle as the cold rolling process COLD is set to a time later than the work start point P13 representing the earliest possible start time, the cycle chance C31 is set. Therefore, the work start point P13 of the earliest possible start time is changed to the start point P23 in the cycle chance C31. Accordingly, the work start points P14 and P15 representing the earliest start possible time on the downstream side are also considered in the constraints. The work is shifted to work start points P24 and P25 representing the earliest possible start time. If there is no cycle chance for the product type corresponding to the earliest possible start time for the production order to be passed, the production order must pass through the process until there is a cycle opportunity. is there. By connecting the work start points P23 to P25 indicating the earliest possible start time in consideration of the constraint, a line L2 indicated by a chain line in FIG. 7 can be represented. The shortest possible lead time in consideration of the cycle chance constraint is called a standard lead time.
[0049]
Further, retroactively from the delivery date, the latest possible start time for each process is sequentially set with the shortest lead time preset for each process on the upstream side. By connecting the work start points P30 to P35 indicating the latest start possible time for each process, a thin solid line L3 shown in FIG. 7 can be represented.
With respect to the latest start possible time, a time in which the constraint of the cycle chance of the equipment in the passing process is taken into consideration is set as the constraint considering latest possible start time. That is, as shown in FIG. 7, if the cycle chance C32 represented by a rectangle in the cold rolling process COLD is set to a time earlier than the work start point P33 representing the latest possible start time, the cycle chance C32 Is changed from the work start point P33 of the latest start possible time to the work start point P43 in the cycle chance C32, and accordingly, the work start points P32 and P31 representing the latest start possible time on the upstream side. , P30 are also shifted to the work start points P42, P41, P40 representing the latest possible start times for the constraint. By connecting the work start points P40 to P45 indicating the latest start time at which the constraint is considered, a thick solid line L4 in FIG. 7 can be represented.
[0050]
Therefore, in FIG. 7, in each facility, the production timing is allocated between the line L2 representing the earliest possible start time of constraint consideration and the line L4 representing the latest start possible time of constraint consideration, so that the delivery date can be met. A production order that cannot be assigned is a material that cannot be properly arranged, and the latest start possible time is assigned for convenience.
[0051]
The constraint considering earliest possible start time is used to update the constraint considering earliest possible start time when the lock process is performed in connection with the allocation constraint condition at the time of the hill-down, which will be described later, and the constraint considering latest start time. The start possible time is used as a later-described constraint condition at the time of a landslide, which will be described later.
In the stacking process in step S9 in FIG. 5, assuming that the facility capacity is provisionally infinite and going back from the delivery date, the shortest lead time LT will be described later. _MS , Longest lead time LT _ML And standard lead time LT _ST In consideration of the above, a cycle chance is searched for, the production timing of the production order in the upstream side process, typically, the production start time is sequentially allocated, and this is repeated for each production order, and the above-described daily bucket of FIG. This is the process of accumulating the required production time of a production order assigned to BKi, and calculating the bucket filling rate, in other words, which equipment will be used and how much operation rate when production is performed with an appropriate lead time from the delivery date. I do. According to the result of the calculation, it is desirable to appropriately adjust the bucket display by solid painting or hatching as described above. Alternatively, for equipment that exceeds the production capacity, it is desirable to apply a solid color in a color corresponding to the type of product in which it is produced, because it becomes easier to understand.
[0052]
A specific flow of the pile processing in step S9 will be specifically described below. As shown in FIG. 8, first, in step S31, it is determined whether or not the material is a material that cannot be properly arranged. This determination is performed by determining whether or not a constraint-considered earliest startable time, which is a constraint on a cycle chance with respect to the earliest startable time, has been calculated in the reference time calculation process of step S8 in FIG. When the earliest possible start time has not been calculated, it is determined that the material is a material that cannot be properly arranged, and the process proceeds to step S32. If the earliest possible start time is calculated, it is determined that the material is not a material that cannot be properly arranged, and the process proceeds to step S33.
[0053]
In this step S33, the delivery date is first set as the current process, and then the process proceeds to step S34, where the longest lead time LT from the current process to the one upstream process is set. _ML , Shortest lead time LT _MS Is read from the process table 20c, and the standard lead time LT _ST As a result, the result obtained in consideration of the cycle chance constraint described above is read in a form diverted, and then the process proceeds to step S35, where LT _ML > LT _ST > LT _MS It is determined whether or not the first lead time arrangement is satisfied. When the first lead time arrangement is satisfied, the process shifts to step S36 to determine the standard lead time LT for one upstream process. _ST From the starting point, in the past direction, that is, in the longest lead time direction, a cycle chance of the same product type is searched for each manufacturing order, a manufacturing timing is assigned to the searched cycle chance, and then the process proceeds to step S37, and all the manufacturing processes are performed. It is determined whether or not the allocation has been completed. When the allocation has been completed, the stacking process is terminated. Then, the process returns to the step S34. This series of processing is repeated until it goes back to the first step.
[0054]
By the way, if the result of the determination in step S35 is LT _ML > LT _ST > LT _MS If the first lead time arrangement is not satisfied, the flow shifts to step S39, where LT _ST > LT _ML > LT _MS It is determined whether or not the second lead time arrangement is satisfied. If the second lead time arrangement is satisfied, the process shifts to step S40 to determine the longest lead time LT. _ML The shortest lead time LT starting from _MS Search for cycle chances of the same product type for each production order for the process one upstream in the direction, and find the shortest lead time LT _MS It is determined whether there is a cycle chance of the same product type by then. If there is a cycle chance of the same product type, the process proceeds to step S41, and the manufacturing timing is allocated to the corresponding cycle chance. Move to step S37.
[0055]
Further, the result of the determination in step S40 is that the shortest lead time LT _MS If there is no cycle chance before, the process proceeds to step S42, where the longest lead time LT _ML , A cycle chance of the same product type is searched for each production order for one upstream process in the past direction, and a manufacturing timing is assigned to the searched cycle chance, and then the process proceeds to step S37.
[0056]
Furthermore, the result of the determination in step S39 is LT _ST > LT _ML > LT _MS If the second lead time arrangement is not satisfied, the process proceeds to step S43, where the shortest lead time LT _MS , The cycle chance of the same product type is searched for each production order for one process upstream in the past direction, the production timing is assigned to the searched cycle chance of the same product type, and the process proceeds to step S37. .
[0057]
The above-described process of allocating a series of manufacturing timings is also repeated for another process on the upstream side. When the allocation is completed for all the manufacturing processes, the process further proceeds to step S44 to complete the allocation for all the manufacturing orders. It is determined whether or not there is a production order that has not been allocated. When there is a production order that has not been allocated, the process returns to step S31 and the processing is repeated. When the allocation has been completed for all the production orders, the stacking processing ends.
[0058]
The processing in FIG. 8 corresponds to the stacking means.
As the production timing, any of a production start time, a production intermediate time, and a production end time may be used. However, a case where the production start time is used will be described below as an example. The present invention is not necessarily limited to this. The explanation up to this point is still a pile of piles, and in some cases the longest lead time may be exceeded, it seems strange at first glance, but it is appropriate by real-time adjustment of mountain collapse and cycle chance described later Be converted to This will be described later.
[0059]
At this stage of the pile, the order of each production order may be the same as the order arranged in the host computer for each product type in ascending order of delivery date. Also, whether to search in the past or the future for the same product type in one upstream process according to each lead time arrangement can secure the shortest lead time as much as possible and suppress the lead time to less than the longest lead time. This means that the vehicle is oriented in the direction, and even if it is no good, it is based on the fact that the movement by the landslide described later can be reduced.
[0060]
In this stacking process, by setting the standard lead time for allocating the production start time in each process of each production order while considering the constraints of cycle chances retroactively from the delivery date, each production order is assigned to each process It is done by allocating to the cycle chance to do. Specifically, as shown by the thick solid line L5 in FIG. 9, the cycle time is considered retroactively from the delivery date, and the longest lead time and the standard lead time are used. It is to allocate toward. Here, ◎ indicates a reference time which is a manufacturing start time in each facility. Then, for example, the production time of each production order of the third tandem code mill 3TCM, which is a facility of the cold rolling COLD process, is piled up on a daily basis, so that the third tandem on the Nth day as shown in FIG. If the operation rate of the cold mill 3TCM exceeds 100%, a mountain collapse will be performed.
[0061]
Here, we will move on to the explanation of the landslide. The landslide is to shift the production timing to another cycle opportunity of the same product type as that of the production order that causes the operation rate to exceed 100%. Real-time adjustment of the cycle opportunity (also referred to as cycle calendar adjustment) described later. Assuming that this is not performed, the cycle chance C32 passing through the line L4 shown by a thin solid line and the previous cycle chance based on the constraint-constrained latest start possible time set by the standard lead time considering the cycle chance retroactively from the delivery date The period within C31 is the adjustable range A1 due to the landslide.
[0062]
Further, assuming that the cycle chance is adjusted in real time, the cycle chance C31 is extended on the horizontal line of the cycle setting line L5 on the past side of the cycle chance C31, or on the future side of the cycle chance C31 and the next cycle. It is possible to extend the cycle chance until the end of the chance C32, that is, until the latest start time at which the constraint is considered, and the adjustable range A2 due to the landslide including the cycle calendar adjustment is the case where the cycle calendar adjustment is not performed. It can be made longer than the landslide adjustable range A1.
[0063]
The real-time adjustment (cycle calendar adjustment) of the cycle chance is performed by a manual operation, for example, by using the mouse 3d connected to the information processing terminal 3 shown in FIG. 1 to execute the cycle of the corresponding product type in the cycle calendar shown in FIG. A desired time zone is newly created by dragging the display end of the time bucket to enlarge or reduce, moving by dragging other than the display end, or by operating a key from a keyboard 3c connected to the same information processing terminal 3, for example. For example, a time bucket of a cycle of a product type corresponding to the above is generated. The cycle calendar after these adjustments can be stored and updated in the cycle calendar file 20d at any time, and is reflected in the production plan creation system and the management system.
[0064]
When performing the landslide process, the longest lead time LT is satisfied even if the constraint-considered earliest startable time and the constraint-considered latest startable time are satisfied. _ML If it is no longer possible to satisfy the conditions, the production order of the corresponding product type is not collapsed, but the production order of another product type is collapsed or the shortest lead time LT is adjusted by adjusting the cycle calendar. _MS And the longest lead time LT _ML Move the cycle chance so as to satisfy the conditions, expand or reduce the cycle chance, or create a new cycle chance and perform the mountain collapse.
[0065]
A specific example of the landslide processing will be described with reference to FIG.
In this landslide process, first, in step S51, it is determined whether or not there is a daily bucket to be landslide that exceeds the facility capacity of the daily buckets created in the pile process. If there is no one-day-unit bucket to be subjected to landslide, the landslide-processing is terminated as it is, and if there is a one-day-unit bucket to be landslide, the process proceeds to step S52.
[0066]
In this step S52, it is determined whether or not the facility having the bucket on a daily basis to be a landslide is a bottleneck facility. If the facility is a bottleneck facility, the process shifts to step S53 to perform the capacity priority allocation process. After the selection, the process proceeds to step S55. If the device is other than the bottleneck facility, the process proceeds to step S54, and the delivery date priority allocation process is selected, and then the process proceeds to step S55. Whether or not the equipment is a bottleneck equipment is determined based on whether or not the equipment constitutes the manufacturing process with the highest operation rate averaged over many days.
[0067]
Here, the capacity priority allocation process is a bottleneck facility that is going to go downhill with the aim of making the bottleneck facility operate at full speed and minimizing the time when the facility is idle as much as possible Is to temporarily reassign the constraint-considered earliest possible start time as a pre-process for performing the landslide on the manufacturing order in, and then execute the landslide.
[0068]
Delivery date priority assignment processing means that if there is a daily bucket that is in a production capacity excess state as a result of the pile processing described above for equipment other than bottleneck equipment, a daily production bucket in an excess production capacity state The production order to which the production timing is assigned is moved down to another one-day bucket in a predetermined priority order, and when the excess production capacity state is resolved, the mountain crushing process is ended.
[0069]
In step S55, it is determined whether or not the capability priority allocation process is selected. If the capability priority allocation process is selected, the process shifts to step S56, and first, the constraint consideration re-start of each in-process production order is started again. The possible time is re-allocated, and then the process proceeds to step S57 to calculate the priority of the production order in which the production timing is allocated to the buckets on a daily basis. This priority is calculated by calculating the time interval between the manufacturing start time currently assigned in the bucket and the constraint-considered latest possible start time for each in-flight manufacturing order. Priority is set higher.
[0070]
Here, the in-progress production order is a production order that is currently waiting for the production timing in the process, and by giving priority to this production order, it is possible to prevent the lead time from slowing down. , Contributing to reduction of inventory.
Next, the process proceeds to step S58 to execute a mountain crush by the first advance process or the second advance process for each in-process production order to be crushed, and then proceeds to step S61 described later.
[0071]
Here, the first postponing process is to move the production start time of a production order having a low priority in the limit in time for the delivery date to the cycle chance of the corresponding product type on the future side. The load on the production capacity of the equipment is not considered, but the cycle chance at the destination is considered. If there is a constraint on the shortest lead time or the longest lead time in the lead time between the process to which the landslide target equipment belongs and the preceding and following processes, a cycle chance that satisfies the condition is searched for.
[0072]
In addition, the second postponing process is to move the production start time of a low-priority production order to the cycle chance of the corresponding product type on the future side even if the delivery date is not allowed to be in time. The condition does not consider the load on the production capacity of the equipment at the destination, but does consider the cycle chance at the destination. If there is a constraint on the shortest lead time or the longest lead time in the lead time between the process to which the landslide target equipment belongs and the preceding and following processes, a cycle chance that satisfies the condition is searched for.
[0073]
It may seem strange to allow the delivery date to be missed. For example, the delivery date of a so-called tied order product delivered to a specific customer is absolute, In this way, the delivery date is only temporarily set, so that there is some flexibility, so that the above-described processing can be performed by previously determining the priorities according to these types. become.
[0074]
If the result of the determination in step S55 is that the delivery date priority allocation process is selected instead of the capability priority allocation process, the flow shifts to step S59, and the same applies to the day-by-day bucket of the pile processing result as in step S57. Calculate the order of priority of the production orders that make up the daily bucket.
Next, the process proceeds to step S60, in which a mountain crush is performed for each production order by one or more of the forward process, the substitute transfer process, the first advance process, and the second advance process, and then proceeds to step S61 described below. I do.
[0075]
Here, the forward processing is to move to the front side (past side) in order from the production order having the highest priority. As a constraint, the load on the production capacity of the facility at the destination is not considered, but the Considering the cycle chance, the shortest lead time LT is assumed between the upstream process after temporarily moving the production order targeted for the landslide. _MS And the lead time is set to the longest lead time LT with the downstream process. _ML Search for a cycle chance of the corresponding product type that satisfies the constraint condition of keeping within. That is, the production start time T after the movement _ST Is the earliest possible start time T taking into account the constraints of the upstream process as shown in the following equations (5) and (6). _PCE The shortest lead time LT between the upstream process _MS Is greater than or equal to the value obtained by adding _PCL Longest lead time LT between the process and the downstream process _ML Is set to be less than or equal to the value obtained by subtracting.
[0076]
T _ST ≤T _PCE + LT _MS ............ (5)
T _ST ≤T _PCL -LT _ML ............ (6)
However, the time is set between the earliest possible start time for constraint consideration and the latest possible start time for constraint consideration of the own process.
Further, the substitute transfer processing is to perform the transfer of the production orders having the lower priority order to the substitution equipment designated by the alternative equipment list definition file 25 of FIG. 6 in order from the production order having the lower priority order. Considering, as a constraint, the load on the production capacity of the equipment at the transfer destination (it is not possible to allocate to a cycle chance where the production capacity is exceeded due to the allocation of the production order). In order to secure the shortest lead time with the upstream process, the production start time after the transfer is temporarily changed to the earliest possible start time T in consideration of the constraint of the upstream process. _PCE The shortest lead time LT with the upstream process _MS After the sum of the time, the delay start time T considering the constraints of the downstream process in order to keep the lead time with the downstream process after the transfer to the substitute facility within the longest lead time _PCL Longest lead time LT between the process and the downstream process _ML Before the time after subtracting.
[0077]
In step S61, it is determined whether or not the capability priority allocation process is selected. If the capability priority allocation process is selected, the process shifts to step S62 to re-start the unprocessed production order at the constraint-aware early start possible time. The allocation is performed, and the process then proceeds to step S63 to calculate the priority order of the unprocessed production orders excluding the in-process production order in which the production timing is allocated to the buckets on a daily basis. This priority is calculated by calculating the time interval between the currently allocated production start possible time and the constraint-considered latest start possible time for each unprocessed production order, and the shorter the calculated time interval, the higher the priority. Is set.
[0078]
Next, the process proceeds to step S64, where the unfinished production order is subjected to at least one of the alternative transfer process, the first advance process, and the second advance process, and then the process returns to step S51.
If the result of the determination in step S62 is that delivery date priority allocation processing has been selected, the process proceeds to step S65, where the daily processing buckets of the stacking processing result are processed on a daily basis in the same manner as in step S60. Of in-process production orders excluding the in-process production order in which the production timings are assigned to the buckets.
[0079]
Next, the process proceeds to step S66, where the unfinished manufacturing order is subjected to one or more of the forward processing, the substitute transfer processing, the first advance processing, and the second advance processing, and the process returns to step S51.
This series of processing in FIG. 10 corresponds to the mountain crushing means of the present invention.
By the way, when the manufacturing start time in a certain manufacturing process is changed by the landslide process, the change in the manufacturing start time is propagated to the upstream process and the downstream process, and the allocation position is optimized. Propagation processing is performed.
[0080]
In this propagation process, as shown in FIG. 11, first, in step S71, the upstream-side propagation process end flag FU is reset to “0” indicating that the process is not completed, and the downstream-side propagation process end flag FD is set to the downstream side propagation flag. The process is reset to “0” indicating that the process has not been completed, and then the process proceeds to step S72, where the shortest time between the upstream process and the downstream process, which is necessary for the propagation process, is compared with the current process in question. Lead time LT _MS And the longest lead time LT _ML Is read from the process table 20c, and then the process proceeds to step S73.
[0081]
Considering the real-time adjustment of the cycle chance of the current process, or the upstream and downstream processes, which is the current problem, suppose that the process start time of a certain product in a certain process is advanced, , And if it is delayed later, the shortest lead time LT with the downstream process _MS The problem is whether the above lead time can be ensured. Similarly, if the lead time is set forward, the longest lead time LT can be set between the downstream step and the upstream step if delayed. _ML This is because whether or not the lead time can be suppressed is a problem.
[0082]
In this step S73, it is determined whether or not the upstream-side propagation processing end flag FU is set to "1". If this flag is set to "1", the upstream-side propagation processing end step FU1 is performed without performing the upstream-side propagation processing. When the upstream-side propagation processing end flag FU has been reset to "0", the flow shifts to step S74.
[0083]
In this step S74, the time required from the manufacturing start time in the process in which the landslide was performed to the manufacturing start time at the present time in the process one step upstream from the manufacturing start time (in consideration of the cycle chance constraint). TP _U And when _ML > TP _U > LT _MS And TP _U > LT _MS > LT _ML It is determined whether or not a temporal relationship (hereinafter referred to as a fourth lead time arrangement and a fifth lead time arrangement, respectively) is satisfied, and the fourth lead time arrangement or the fifth lead time arrangement is satisfied. If the time allocation is satisfied, the flow directly proceeds to step S75 without performing the upstream propagation processing, sets the upstream propagation processing end flag FU to “1”, and jumps to step S81 to be described later. If the lead time arrangement or the fifth lead time arrangement is not satisfied, the flow shifts to step S76.
[0084]
In this step S76, TP _U > LT _ML > LT _MS It is determined whether or not the sixth lead time arrangement is satisfied. If the sixth lead time arrangement is satisfied, the process shifts to step S77 to determine the longest lead time LT _ML Searching in the direction of the shortest lead time starting from the shortest lead time LT _MS It is determined whether or not there is a cycle chance of the corresponding product type. If there is a cycle chance of the corresponding product type, the process shifts to step S78 to manufacture the product at the cycle chance of the corresponding product type. After allocating the start time, the process proceeds to step 81 described later. If there is no cycle chance of the corresponding product type, the process proceeds to step S79.
[0085]
Here, it goes without saying that the cycle chance of the corresponding product type may be a cycle that constitutes a cycle of a similar product type as in the case of the tinplate and tinplate.
In step S79, the longest lead time LT _ML If the production start time is assigned to the cycle chance of the first applicable product type starting from the starting point and the shortest lead time can not be satisfied, as in the case of piles, it is a material that can not be properly placed Then, for the sake of convenience, the latest start possible time is allocated, and then the process proceeds to step S81 described later.
[0086]
Also, the result of the determination in step S76 is TP _U > LT _ML > LT _MS If the sixth lead time arrangement is not satisfied, the flow shifts to step S80 to determine the cycle chance of the corresponding product type in the upstream process for performing the propagation processing by the shortest lead time LT. _MS Starting from the starting point, the production start time is assigned to the cycle chance of the first applicable product type, and as a result, if the longest lead time cannot be satisfied, the material can not be properly placed and the latest start can be started for convenience. After allocating the time, the process proceeds to step S81.
[0087]
In step S81, it is determined whether or not the downstream-side propagation processing end flag FD is set to "1". If the downstream-side propagation processing end flag FD is set to "1", the process jumps to step S89 described later, and the downstream-side propagation processing end flag is set. If the FD has been reset to "0", the flow shifts to step S82.
In this step S82, according to the flow of time from the manufacturing start time in the process in which the landslide was performed, the required time up to the present manufacturing start time in the process one step downstream from the manufacturing start time (cycle chance constraint is set). TP is equivalent to the standard lead time) _D And when _ML > TP _D > LT _MS And TP _D > LT _MS > LT _ML It is determined whether or not the temporal relationship (hereinafter, referred to as a fourth lead time arrangement or a fifth lead time arrangement) is satisfied in any one of the fourth lead time arrangement and the fifth lead time arrangement. When the arrangement is satisfied, the process proceeds to step S83 without performing the downstream propagation process, sets the downstream propagation process end flag FD to “1”, and then jumps to step S89 to be described later. If the lead time arrangement or the fifth lead time arrangement is not satisfied, the flow shifts to step S84.
[0088]
In this step S84, TP _D > LT _ML > LT _MS It is determined whether or not the sixth lead time arrangement is satisfied. If the sixth lead time arrangement is satisfied, the flow shifts to step S85 to determine the longest lead time LT _ML Searching in the direction of the shortest lead time starting from the shortest lead time LT _MS It is determined whether or not there is a cycle chance of the corresponding product type. If there is a cycle chance of the corresponding product type, the process shifts to step S86 to manufacture at the cycle chance of the corresponding product type. After allocating the start time, the process proceeds to step 89 described later. If there is no cycle chance of the corresponding product type, the process proceeds to step S87.
[0089]
Here, the cycle chance of the corresponding product type may be a cycle obtained by combining cycles of similar product types as in the above-described example of the tinplate and tinplate.
In step S87, the longest lead time LT _ML Starting from the starting point, searching for the start time is assigned to the cycle chance of the corresponding product type, and as a result, if the shortest lead time can not be satisfied, it is considered that the material can not be properly arranged as in the case of piled up Then, for the sake of convenience, the latest possible start time is allocated, and then the process proceeds to step S89 described later.
[0090]
In addition, the determination result of step S84 is TP _D > LT _ML > LT _MS If the sixth lead time arrangement is not satisfied, the flow shifts to step S88 to determine the cycle chance of the corresponding product type in the downstream process for performing the propagation processing by the shortest lead time LT. _MS From the starting point to the future side, and assign the manufacturing start time to the cycle chance of the corresponding product type. If the longest lead time cannot be satisfied as a result, the latest start possible time is assigned for convenience as a material that cannot be properly placed. Then, the process proceeds to step S89.
[0091]
In step S89, it is determined whether or not the propagation process to all the upstream processes has been completed. If the propagation process to all the upstream processes has not been completed, the process proceeds to step S90, and the current process is performed as the upstream process. The process proceeds to step S92 after selecting one more upstream process, and proceeds to step S91 when the current upstream process is the most upstream process and the propagation process to all upstream processes is completed. After the side propagation processing end flag FU is set to "1", the flow shifts to step S92.
[0092]
In step S92, it is determined whether or not the propagation process to all downstream processes has been completed. If the propagation process to all downstream processes has not been completed, the process proceeds to step S93, and the current process is performed as the downstream process. After selecting one process on the downstream side, the process proceeds to step S95. When the current downstream process is the most downstream process and the propagation process to all downstream processes is completed, the process proceeds to step S94, and the process proceeds to step S94. After the side propagation processing end flag FD is set to "1", the flow shifts to step S95.
[0093]
In step S95, it is determined whether or not the propagation processing has been completed for all the processes by determining whether or not both the upstream propagation processing end flag FU and the downstream propagation processing end flag FD are set to “1”. If there is a processing step, the flow returns to step S72, and the same propagation processing as in steps S72 to S94 is alternately performed on the corresponding processing step on the upstream side and the downstream side, and all the propagation processing ends. Sometimes, the process proceeds to step S96.
[0094]
In this step S96, it is determined whether or not the series of operations in steps S71 to S94 has completed the propagation processing for all the production orders subjected to the landslide, and there is a production order for which the propagation processing has not been completed. In this case, the process returns to step S71, and when the propagation process is completed for all the production orders, the propagation process is completed.
[0095]
A series of processes described above in FIG. 11 correspond to the propagation processing means.
In this way, the piles are collapsed and the piles are again piled up to adjust the operation rate of the equipment to 100% or less. However, as a result of the automatic collapses, there is a problem that the delivery date is exceeded, or Although there is no actual harm, there is a case where there is a case where the interval between the manufacturing timing in the previous process is too long and the number of work days during that time is too long, so it is necessary to manage this There is. Therefore, the operator in charge of each process verifies the result of the above-described adjustment, and if it is determined that fine adjustment of the process is better, the general operator may select one of the information processing terminals 3A to 3D. , The real time adjustment of the cycle chance shown in FIG. 14 is performed.
[0096]
This real-time adjustment is performed by displaying a cycle calendar as shown in FIG. 9 on the display 3b of the information processing terminal 3 and operating the mouse 3d to adjust the cycle chance display on the cycle calendar. The adjustment of the cycle chance display includes, for example, enlargement / reduction, copying, moving, and deletion of the cycle chance display, and change of the product type. In the system according to the present invention, the results of those adjustments are actually reflected in the production plan. It works.
[0097]
First, in step S101 in FIG. 14, the above-described cycle calendar shown in FIG. 4 is displayed on the display 3b, and a certain process type cycle (for example, a thin cycle in a cold rolling process) in the displayed cycle calendar is displayed. The process proceeds to step S102 after executing a cycle calendar editing process for editing a cycle chance representing a production time zone in (for example, cold rolling by a tandem cold mill, annealing in a continuous annealing furnace, or pickling).
[0098]
In step S102, the cycle calendar editing process in step S101 ends, and it is determined whether the editing process has been determined. This determination is made, for example, by determining whether or not a predetermined setting key (for example, an enter key) of the keyboard 3c has been pressed. If the predetermined setting key has not been pressed and the editing process has not been determined, the aforementioned step S101 is performed. When the predetermined setting key is pressed and the editing process is determined, the process proceeds to step S103.
[0099]
In this step S103, a pre-check is performed on the determined editing process to determine whether or not this is appropriate. This pre-check appropriateness determination processing determines whether or not the proper placement is impossible in which the cycle chance of the same product type does not exist in the preceding and following processes due to the change of the cycle chance. For example, in a series of processes, the above-described propagation processing or the production of a production order passing therethrough due to circumstances such as a bottleneck in the production capacity of the equipment (production bottleneck) for the entire production. If the lock process for setting the start time to be fixed has already been performed in the preceding and following processes, and if the cycle chance of the process to be adjusted is moved, for example, the temporal order relationship is reversed. To determine whether it becomes impossible to comply with the locked timing (lock position) as the production start time of the cycle chance in the process before (upstream side) or after (downstream side) the production order. However, when the state is the improper placement state and when the lock position cannot be observed, the process proceeds to step S104, and After the guidance information indicating that the lock position cannot be observed is displayed on the display 3b, the process returns to the step S101. If the proper arrangement cannot be performed or the lock position cannot be observed, that is, if the cycle chances are continued as appropriate, step S105 is performed. Move to When the guidance information indicating the improper arrangement state or the lock position obstruction is displayed on the display 3b, the operator in charge can repeatedly adjust the cycle chance display until the display is stopped. Therefore, even if an improper arrangement state or lock position obstruction occurs due to the once-performed real-time adjustment of the cycle chance, it is not necessary to return to the original state, and the operability is significantly improved.
[0100]
In step S105, the changed cycle chance after the execution of the cycle calendar editing process determined in step S101 is overwritten and stored in the production plan file 20e, and then the process proceeds to step S106.
In this step S106, it is determined based on the changed cycle calendar whether or not there is a material that cannot be properly placed. If there is a material that cannot be placed properly, the process proceeds to step S107, and the appropriate placement is disabled. The operator in charge adjusts the cycle chance of manufacturing the material, and re-arranges the material in a proper arrangement. Then, the process proceeds to step S108. If there is no material that cannot be properly arranged, the process directly proceeds to step S108.
[0101]
In step S108, the above-described reference time calculation process shown in FIG. 7 is performed based on the cycle calendar after the editing process, and then the process proceeds to step S109 to perform real-time adjustment of cycle chance for a certain process. Then, the same-position stacking process for stacking under the constraint that the cycle chance of the downstream process is not moved is executed, and then the real-time adjustment of the cycle chance is ended.
[0102]
Here, the cycle calendar editing process in step S101 corresponding to the above-described real-time adjustment of the cycle chance will be described in more detail with reference to FIG. In FIG. 15, first, in step S111, the cycle calendar is read from the cycle calendar file 20d and displayed on the display 3b. Then, the process proceeds to step S112 to determine whether or not the left click is performed with the mouse 3d. When clicked, the process proceeds to step S113, where it is determined that the cycle chance at the current pointer position has been selected as an adjustment target, and the cycle chance is displayed in a predetermined color, for example, indicating that the cycle chance has been selected. Returning to S112, if the mouse 3d has not been left-clicked, the flow shifts to step S114.
[0103]
In this step S114, it is determined whether or not a cycle chance has been selected, and if it has been selected, the process proceeds to step S115, where it is determined whether or not the authority to adjust the selected cycle chance exists. This determination is made by determining whether or not the name of the responsible operator or general operator who has been set in advance for the corresponding cycle chance and the name of the logged-in operator or general operator matches. If the two do not match, the process proceeds to step S116 to display guidance information indicating that there is no adjustment authority and the name of the responsible operator or general operator having the adjustment authority on the display 3b, and then proceeds to step S102 in FIG. If the name of the authorized person matches the name of the operator in charge or the name of the general operator, the process proceeds to step S117.
[0104]
In this step S117, it is determined whether or not the mouse 3d is being dragged. When the mouse 3d is being dragged, the flow shifts to step S118.
In step S118, if the selected position is the start and end of the cycle chance display in accordance with the drag state of the mouse 3d, the process proceeds to step S119, and the display is enlarged and reduced. The process proceeds to step S120 to sequentially move and display the selected cycle chance, and then proceeds to step S121 to determine whether or not dragging has been completed. Is completed, the process proceeds to step S122.
[0105]
In this step S122, it is determined whether or not it is a movement of the cycle chance. If the movement is a movement, the process proceeds to step S123. When the movement is not the movement, it is determined to be a copy, and the flow shifts to step S124 to copy and display the cycle chance having the same size as the selected cycle chance at the drag end position, and to end the editing process. The process moves to step S102. In step S122, it is determined whether or not the movement is performed based on whether or not the copy key is pressed by an input from the separate keyboard 3c. If the copy key has not been depressed, it is determined to be moving, and if it has been depressed, it is determined to be copying.
[0106]
If the cycle chance has not been selected as a result of the determination in step S114, the flow shifts to step S125 to determine whether or not the mouse 3d has been right-clicked. If the mouse 3d has been right-clicked, the flow shifts to step S126. Then, after performing a new creation process for creating a new cycle chance, the editing process ends, and the process proceeds to step S102 in FIG. 14. If the mouse 3d is not right-clicked, the process directly proceeds to step S102.
[0107]
Further, when the result of the determination in step S117 is that the mouse 3d is not in the drag state, the flow shifts to step S127 to determine whether or not a delete key for deleting the selected cycle chance is selected. If the delete key is selected, the process proceeds to step S128, the selected cycle chance is deleted, the editing process is terminated, and the process proceeds to step S102 in FIG. 14. If the delete key is not selected, the editing process is terminated. Then, the process directly proceeds to step S102 in FIG. However, these operations such as enlargement / reduction, movement, copying, and deletion can be performed simultaneously for a plurality of cycle opportunities by designating a plurality of cycle chance displays as selection targets until the setting is performed in step S102. it can. For example, it may be the case where the equipment is of different processes for manufacturing the same manufacturing order, or the case where it is the equipment of the same process for manufacturing different manufacturing orders.
[0108]
When a material that cannot be properly arranged is generated, it is very effective to display the fact on the display 3b of the information processing terminals 3A to 3D in some form such as a color corresponding to the product type or a display method. is there. This is because based on this display, it becomes easy to perform real-time adjustment of the cycle chance by the manual operation of the operator in charge. It is possible to see what kind of product order production order has become a material that cannot be properly placed, and respond accordingly by appropriately expanding, reducing, moving or newly generating a cycle chance of the relevant product type.
[0109]
Hereinafter, the operation of the production plan creation system according to the present invention will be described in more detail based on the above embodiment.
In the host computer 1 in FIG. 1, the received product order is input, and the status of the in-process product order is input, and further, the order of the product order that can be received can be input.
[0110]
In normal operations, there are two types of cases: one is to create an actual production plan based on a newly received product order, and the other is to select a product order that can be ordered and provide sales support to absorb fluctuations in production capacity. Can be
When a production plan is created based on a newly received product order, the newly received product order is input to the host computer 1. For this product order, enter the demand order name, delivery date, product name, dimensions, quantity, and customer name. Since a newly received product order is not in a work-in-progress state, a work-in-progress stock information file is not created, but the current work-in-progress status of a previously received product order is registered in the work-in-process stock information file 14.
[0111]
That is, as shown in FIG. 2, assuming that the product orders of two demand order names S145-XXXXXX-XX and S145-YYYYY-YY with the quantities of 50,000 kg and 150,000 kg have been received previously, as shown in FIG. AAAAA and BBBB, and as shown in FIG. 6, for a product name AAAAA, hot metal spouted from a blast furnace (BF) is continuously cast from molten steel refined in a steelmaking plant by a continuous casting machine (CC) to form a slab. The slab is hot-rolled (HM), pickled (PIC), cold-rolled (CM), and continuously annealed (CAL) before being shipped as a product. The product name BBBB is also taken out of the blast furnace. The slab is formed by continuously casting molten steel that has been refined with pig iron using a continuous casting machine (CC), and the slab is hot-rolled (HM) and then pickled (PIC). Then, it is cold rolled (CM) and further plated (COAT) before being shipped as a product.
[0112]
In addition, the products handled at steelworks are not limited to the above products, but those obtained by performing slabs formed by continuous casting and then rolling them out as products, and hot rolling the slabs as products as they are Products to be shipped, products that are cold-rolled, continuously annealed, electroplated, and then subjected to another coating treatment before being shipped as products, and products that are subjected to other plating such as hot-dip plating instead of electroplating. There are a wide variety of product forms, such as processing purchased products from other manufacturers and shipping them as products.
[0113]
Referring back to the drawing, the two demand orders are not new orders, but the production orders S145-XXXX-XX-AA and S145-XXXX-XX of 20,000 kg and 30,000 kg for one demand order are not new orders. BB is divided into two, and the other demand order is divided into five 30,000 kg production orders S145-YYYYY-YY-AA to S145-YYYYY-YY-EE, and production orders are generated for each of these. A registration file 13 is formed.
[0114]
The production order S145-XXXXXX-XX-AA is in-process before hot rolling HM, and the production order S145-XXXXXX-XX-BB is in-process after hot rolling HM. S145-YYYYY-YY-AA is the in-process in-process state of the cold rolling CM, and these are stored in the in-process inventory information file 14.
In this state, another operator in charge operates any of the information processing terminals 3A to 3D and is not logged in with the name of the responsible operator, or does not execute the production planning process even if logged in with the name of the responsible operator. In this case, when the general operator operates any of the information processing terminals 3A to 3D to log in with the general operator name and execute the production planning process shown in FIG. 5, first, in step S1, the login name is changed to the general operator name. Since there is, the process proceeds to step S2. Here, when the execution mode is selected to create the production plan, the process proceeds to step S4, and since another operator in charge is not logged in and the production plan is not being processed, the process proceeds to step S5. Here, first, when the stacking process is selected, the process proceeds to step S6, where the new ordered product order information and the in-process stock information stored in the host computer 1 are read, and then the process proceeds to step S6, where the standard table and the process table are processed. , The passing process for each production order is determined.
[0115]
In the example of FIG. 6, the process order AAAA representing the product type is continuously cast by a continuous casting machine (CC) from molten steel obtained by refining hot metal from a blast furnace (BF) in a steelmaking plant as described above. After hot rolling (HM), pickling (PIC), cold rolling (CM), and continuous annealing (CAL), the slab is shipped as a product, and then shipped as a product. The molten steel obtained by tapping and refining from a blast furnace is continuously cast by a continuous casting machine (CC) to form a slab, the slab is hot-rolled (HM), then pickled (PIC), and cold-rolled. (CM) and a plating process (COAT), and then a process of shipping as a product is determined.
[0116]
On the other hand, when the cycle calendar created at this time and stored in the production plan file 20e is displayed on the display 3b, as shown in FIG. 4, for the third tandem cold mill 3TCM and the third continuous annealing furnace 3CAL, It is assumed that a cycle chance represented by a rectangular frame is set for each product type for each day. Of these cycle chances, the cycle chances that have been over-assigned are displayed in solid black, and those that have been assigned without exceeding the assignments are indicated by hatching. In the cycle calendar display of FIG. 4, a cycle opportunity in which part or all of the time zones of cycles of different product types are set so as to overlap (a synthesis cycle in which different types of products are alternately manufactured in one facility, etc.). ) Are displayed over two or three columns.
[0117]
Returning to FIG. 5 again, the shortest lead time LT as shown in FIG. _MS , A cycle setting line in which the earliest start possible time, the constraint start earliest start time, the latest start possible time, and the constraint start latest start possible time are set (step S8).
At this time, each of the product names AAAA and BBBB is assumed to be a properly arrangable material capable of calculating the earliest possible start time in consideration of the restriction of the passing process from the earliest possible start time at the in-process position.
[0118]
Next, retroactively from the delivery date, the longest lead time LT for each process _ML , Shortest lead time LT _MS And standard lead time LT _ST In consideration of the above, the products to be manufactured at the corresponding cycle chance are determined, the manufacturing time is accumulated and accumulated, and the manufacturing start time of each product is set to the cycle chance corresponding to the variable length bucket set by the cycle calendar of FIG. A stacking process for allocating in the manufacturing time to the corresponding time zone is executed (step S9).
[0119]
In the stacking process, as described above, since the production orders AAAA and BBBB are not materials that cannot be properly arranged, the process proceeds from step S31 to step S33 as shown in FIG. 8, and the delivery date is set as the current process.
At this time, for example, the manufacturing order AAAA will be described. As shown in FIG. 12, the cycle chance CY1 in the continuous annealing CAL which is one upstream process of the delivery date is the longest lead time LT. _ML > Standard lead time LT _ST > Shortest lead time LT _MS Assuming that the first lead time arrangement is set so as to satisfy the following condition, the process proceeds from step S35 to step S36 in FIG. _ST From the cycle chance CY1 in the direction of the longest lead time to the production start time TP ₁ Assign
[0120]
Next, the process proceeds to step S37, and since the production start time assignment has not been completed for all the processes yet, the process proceeds to step S38 to perform the cold rolling COLD, which is one upstream process of the continuous annealing CAL, in the current process. And then returns to step S34, and in this cold rolling COLD, LT _ML > LT _ST > LT _MS Since the first lead time arrangement satisfies the following condition, the cycle start time TP shown in FIG. ₂ Assign
[0121]
In this way, the production start time is sequentially assigned to the cycle chances of the hot rolling HOT and the continuous casting CC in the upstream process, and when the assignment of the production start time is completed for all the processes of all the production orders, the stacking process ends.
By the way, in the stacking process, as shown in FIG. 13, the first lead time arrangement described above cannot be satisfied between the upstream side process and the standard lead time LT. _ST > Longest lead time LT _ML > Shortest lead time LT _MS If the second lead time arrangement is satisfied, the process proceeds from step S35 to step S40 through step S39 in FIG. _ML The shortest lead time LT starting from _MS Side, a cycle chance is searched for, and as shown by a solid line in FIG. _ML To the shortest lead time LT _MS If the cycle chance CY3 exists on the side, the process proceeds to step S41 in FIG. 8, and the production start time TP is set to the nearest cycle chance CY3. ₃ Assign On the other hand, when the second lead time arrangement is satisfied, the shortest lead time LT _MS If the cycle chance CY3 shown by the solid line in the direction does not exist, the process proceeds from step S40 to step S42 in FIG. _ML To standard lead time LT _ST Search for a cycle chance in the direction, that is, in the past direction. In this case, since both the production orders AAAAA and BBBB are materials that can be appropriately arranged, there is a cycle chance of the product type corresponding to the latest start possible time side from the earliest start possible time, and the constraint consideration earliest possible start time exists. Therefore, as shown in the dashed line in FIG. _ML From the start to the earliest possible start time considering the constraint, the production start time TP marked with a circle in the cycle chance CY4 ₄ Assign
[0122]
Further, when the second lead time arrangement is not satisfied, that is, the longest lead time LT _ML > Shortest lead time LT _MS > Standard lead time LT _ST , The standard lead time LT _ST > Shortest lead time LT _MS > Longest lead time LT _ML , The shortest lead time LT _MS > Longest lead time LT _MD > Standard lead time LT _ST And the shortest lead time LT _MS > Standard lead time LT _ST > Longest lead time LT _ML In the case of, the process proceeds from step S39 in FIG. 8 to step S43 to search for the cycle chance of the product type corresponding to the past from the shortest lead time, and allocate the manufacturing start time to the first cycle chance. Shortest lead time LT _MS Longest lead time LT _ML The shortest lead time LT can be achieved by applying default treatments to prevent leakage on the system in this way, even in cases where the actual lead time is shorter. _MS And the longest lead time LT _ML Even if an incorrect value is input, the system will not stop operating due to the loss of the corresponding logic.
[0123]
Thus, in the pile processing, the shortest lead time LT, which is an essential condition, _MS And the standard lead time LT _ST <Longest lead time LT _ML Is the longest lead time LT _ML To satisfy the longest lead time LT _ML To the shortest lead time LT _MS Search for the cycle chance of the product type corresponding to the side and the allocation position in it, and if there is no allocation position, the longest lead time LT _ML To the shortest lead time LT _MS In the opposite direction, ie, the longest lead time LT _ML Search for the cycle chance of the product type corresponding to the side that does not satisfy the above and the allocation position in it.
[0124]
In this pile processing, the longest lead time LT _ML Position is determined in consideration of the cycle chance of the corresponding product type.For example, after completion of hot rolling, it is necessary to start pickling within the required time. The longest lead time LT when the time is over and the necessity cannot be satisfied and there is no facility that can temporarily surpass heat insulation etc. _ML By setting, a stable quality can be ensured, a trouble during manufacturing can be prevented, and a production plan that can achieve energy saving can be created.
[0125]
As described above, when the production start time of each production order is allocated to the variable length buckets constituting the cycle chance of the corresponding product type in the order of production, the filling rates fi1 to fin are calculated for each variable length bucket, and The filling rate fi0 is calculated for each bucket on a daily basis.
If the calculated filling ratios fi1 to fin of the variable-length buckets exceed 100% as shown in FIG. 4, each bucket display on the cycle calendar is displayed in solid color, and the filling ratio is 100% or less. Is represented by hatching according to the filling rate. When the filling ratio is equal to or more than a predetermined value less than 100%, the width of the hatched display may be displayed thick, and when the filling ratio is less than the predetermined value, the width may be displayed thin.
[0126]
On the other hand, the required manufacturing time for each manufacturing order for each bucket per day is accumulated for each process, and the filling rate fi0 for each process divided by 24 hours is calculated as the operating rate. The operating rate for each process is shown in a characteristic diagram in which the horizontal axis represents time and the vertical axis represents operating rate, as shown in FIG.
In FIG. 16, in the third tandem cold mill 3TCM, the operation rate exceeds 100%, that is, the production capacity of the equipment, on the 13th and 15th, and in the third continuous annealing furnace 3CAL, on the 12th, 14th, and 16th. The production capacity of the equipment has been exceeded. In all processes, if the manufacturing process that has the highest utilization rate for many days is the bottleneck process, it is assumed here that the 3TCM in the third tandem cold is the bottleneck process. I do. On the other hand, as shown in FIG. 17, the third tandem cold mill 3TCM has a large in-process inventory on the 12th and 14th days, and the third continuous annealing furnace 3CAL has an in-process inventory on the 13th. More.
[0127]
By the way, although related to the bottleneck process described above, the process returns to the production planning process in FIG. 5 again, shifts from step S5 to step S12, and then performs the hill-climbing process shown in FIG. The landslide process refers to the process of shifting the production timing of the process that has exceeded the capacity to another cycle opportunity of the applicable product type for the excess process. In addition, for the process to which the bottleneck facility (for example, the third tandem cold mill 3TCM) belongs, the capability priority assignment processing is performed, and for the facility (for example, the third continuous annealing furnace 3CAL) belonging to the process that does not belong to the bottleneck facility, the delivery date Perform priority assignment processing.
[0128]
First, a case where a mountain landslide is performed for equipment that is not a bottleneck equipment will be described.
In this case, in the process of FIG. 10, the process proceeds from step S52 to step S54, and the delivery date priority allocation process is selected. Therefore, the process proceeds from step S55 to step S59, and the process proceeds from step S59 to the stacking result for each in-process production order. Calculate the priority. As described above, this priority order is calculated for each in-process production order by calculating the time interval between the currently allocated manufacturing start time and the constraint-considered latest startable time. The priority is set higher.
[0129]
Next, the process proceeds to step S60, in which the in-process production order is moved forward, the alternative transfer process, and the landslide process on one of the first and second advance processes is performed.
Now, in a certain manufacturing process, the latest time T at which constraints can be considered is considered. _PCL Is set on the Nth day, and the earliest possible start time T for all production orders is _PCE Does not occur, and the filling rate of the bucket of each day of a certain facility on the N-1 day, the N-2 day, the N-3 day and the N-4 day which goes back from the N day is As shown in FIG. 18 (a), over 100% on the (N-1) th and (N-3) th days, the lowest priority is the highest in the bucket for each day, and goes from the lowest to the upper. , The priorities are lower in alphabetical order. Here, during the production order in the bucket, as a method of setting the priority order of the production order to shift its production timing to another cycle opportunity of the same product type during a mountain collapse, there is a restriction on a corresponding facility (process). Considerable latest start time T _PCL The higher the production order, the smaller the value obtained by subtracting the production start time at the currently allocated position on the bucket from, the higher the priority is set. Further, it is assumed that the production order L whose production is planned on the (N-1) th day is the production order with the highest priority to shift its production timing to another cycle opportunity of the same product type.
[0130]
First, by carrying out the landslide in the direction from the (N-1) th day to the past side, that is, the (N-2) th day, and the (N-3) th day direction by the forward moving process, the production on the (N-1) th day in which the filling rate exceeds 100% is performed. Assuming that the production timing of order L is advanced, but there is no cycle chance of the same product type on the N-2th day, the cycle chance of the same product type exists as shown in FIG. Satisfies various conditions, such as being later than the earliest possible start time considering constraints, ensuring the shortest lead time with the upstream process, and ensuring that the lead time with the downstream process is within the longest lead time. The production order L is allocated to the N-3rd day as far as possible. As a result, the filling rate of the bucket per day on the (N-1) th day becomes less than 100%. Therefore, the landslide on the (N-1) th day is completed, and then the landslide on the (N-2) th day is performed. However, since the buckets on a daily basis on the N-2 day are not in a state where the filling rate is over 100%, as shown in FIG. 18C, the landslide is not performed, and then the filling rate is over 100%. The landslide is performed on the buckets of the day N-3 on a daily basis.
[0131]
As shown in FIG. 18 (c), in the bucket on a daily basis of the N-3rd day, the lowermost production order D has the highest priority, so this production order D is shown in FIG. 18 (d). As shown in the figure, the production timing is assigned earlier on the N-4th day of the previous day, and even in this state, the buckets on a daily basis of the N-3th day still have a filling rate of 100%, so the next priority is given. As shown in FIG. 18 (e), the manufacturing order E having a higher rank is assigned with the manufacturing timing advanced on the N-4th day of the previous day, thereby obtaining the filling rate of the bucket on a daily basis on the N-3rd day. Since the 100% excess state is resolved, the landslide on the N-3th day is ended. In FIG. 18 (e), the bucket for each day on the N-4th day is in a state of exceeding the filling rate by 100%, but the excess occurs due to constraints such as the earliest possible start time and the longest lead time. Since the production timing of the production order cannot be advanced, the advance processing ends.
[0132]
As described above, when the state where the filling rate exceeds 100% remains as a result of the forward moving process, the first advance process is performed as shown in FIG. In the first advance processing, the landslide is performed in the future direction from the N-4th day, that is, in the Nth day, the N-2th day, and the N-1st day. At this time, it is assumed that there is no cycle chance of the product type corresponding to the production orders L and H only on the (N-2) th day, and the end point of the (N-1) th day is the latest possible start time in consideration of the constraint.
[0133]
On the N-4th day, as shown in FIG. 19 (a), the uppermost production order E has the lowest priority, so that the production order E has the same cycle chance of the same product type, As shown in FIG. 19 (b), the start time is earlier than the possible start time, the shortest lead time can be secured with the upstream process, and the lead time between the downstream process is shorter than the longest lead time. Postponed to the N-3 day. Even in this state, the daily buckets on the N-4th day are still in the state of exceeding the filling rate by 100%. Therefore, FIG. 19C shows the production order D having the lowest priority, which is the uppermost row in FIG. 19B. Postpone the next N-3 days as shown.
[0134]
As described above, as a result of the postponement processing, the filling rate of the bucket on a day basis of the N-3 day is over 100%, so that the priority of the bucket on a day basis of the N-3 day is the highest. For the low production order L, as shown in FIG. 19D, the production timing is postponed to the (N-1) th day, skipping the (N-2) th day of the same product type having no cycle chance.
[0135]
Even in this postponing process, since the buckets of the day unit on the N-3rd day are still in the state of exceeding the filling rate of 100%, the production order H having the lowest priority in the buckets of the day unit is shown in FIG. As shown in the figure, the production timing is postponed on the (N-1) th day.
In this way, the filling rate of the bucket in the day unit of the (N−1) th day is over 100%. However, since the end point of the (N−1) th day is the latest start possible time in consideration of the constraint, Since the production timing cannot be postponed from the end point of the N-1 day, the first postponement process ends.
[0136]
Next, if the attribute of the production order to be subjected to the second advance processing described below allows a delivery delay, the second advance processing is performed. In this second advance processing, as shown in FIG. 20A starting from the result of the first advance processing shown in FIG. As shown in FIG. 20 (b), the production timing of the production order O having the lowest priority in the bucket for each day is postponed to the Nth day. Even in this state, since the buckets in the day unit of the (N-1) th day still exceed the filling rate of 100%, the production order N with the lowest priority in FIG. Then, the manufacturing timing is postponed on the Nth day, thereby completing the landslide on the (N-1) th day.
[0137]
In the second advance processing, if there is no cycle chance of the same product type on the future side, the shortest lead time cannot be secured with the upstream process, or the lead time with the downstream process is less than the longest lead time If there is no production order that cannot be accommodated in the delivery order or the delivery date can be tolerable, the production order in which the filling rate exceeds 100% is displayed as a material that cannot be properly arranged, and thereafter, it is processed manually. For that purpose, it is extremely effective to perform the above-described real-time adjustment of cycle chances (cycle calendar adjustment).
[0138]
On the other hand, when performing the alternative transfer process instead of the forward process, as shown in FIG. 21 (a), when it is assumed that the day-by-day bucket on the (N-3) th day is in a state where the filling rate exceeds 100%. Then, the production order H having the lowest priority in the day-by-day bucket of the N-3rd day is switched to the production by the substitute facility. At this time, when the switch to the substitute transfer process is determined for the production order H, the earliest possible start time T for the constraint on the production facility H in the alternative equipment is considered. _PCE And the latest possible start time T _PCL Is calculated, and this constraint-considered earliest possible start time T _PCE Is the start time on the N-4th day, and _PCL Is the end of the (N-1) th day, the production order H is manufactured for the buckets of the 1st day in order from the bucket of the (N-4) th day in the substitute facility in the direction of the (N-1) th day. A start time is allocated, and a bucket in a unit of one day in which the filling rate does not exceed 100% even when the manufacturing start time of the manufacturing order H is allocated is searched. In FIG. 21C, since the filling rate exceeds 100% by allocating the production order H to the bucket on a daily basis on the N-4th day, it is determined that the allocation cannot be performed. Since the filling rate of the buckets of the day unit of the third day is also over 100% due to the allocation of the manufacturing order H, it is determined that the allocation cannot be performed. Since the filling rate does not exceed 100% even if H is allocated, as shown in FIG. 21D, the production timing (production start time) of the production order H is set in the bucket of the N-2th day by day. Assign.
[0139]
After the completion of the substitute transfer process for the manufacturing order H, as shown in FIG. 21B, the priority order of the buckets on a daily basis on the (N-1) th day where the production capacity of the facility is in excess is next determined. The same substitute transfer processing as described above is performed for the lowest production order O, and the landslide by the substitute transfer is completed.
As described above, when the landslide for the in-process production order is completed, the landslide for the unprocessed production order is performed with the production start time of the in-process production order locked. Also in this case, in the landslide of equipment other than the bottleneck equipment, the delivery date priority allocation processing is selected in step S54 in FIG. At least one of the first advance processing, the second advance processing, and the alternative transfer processing is performed.
[0140]
On the other hand, when the equipment targeted for the landslide is a bottleneck equipment, in the processing of FIG. 10, the processing shifts from step S52 to step S53, and the capacity priority allocation processing is selected, and accordingly, the processing from step S55 to step S56 is performed. The stacking result of the stacking process described above is discarded for the corresponding one-day bucket, and instead, the in-process production order is reassigned at the earliest possible start time considering the constraint. At this time, a stacking result in consideration of the standard lead time, the shortest lead time, and the longest lead time indicates that only the buckets on a daily basis of the Nth day are in a state where the filling rate exceeds 100% as shown in FIG. Then, if the reallocation is performed at the constraint-considered re-early start possible time, as shown in FIG. 22B, the manufacturing timing is concentrated on the (N−1) th and Nth days, and FIG. First, the existence of the N-1th day, where the filling rate is less than 100%, will be resolved, and the bottleneck facility will be fully operated, manufactured more and more quickly, and will serve the purpose of minimizing the time during which the facility is out of service. become.
[0141]
Next, starting from the re-allocation state at the constraint-considered re-early start possible time in FIG. 22B as a starting point, the process proceeds to step S57 in FIG. 10 and the priority order on the (N-1) th day and the (N) th day is changed. The first advance processing is performed for the production order J having the lowest priority order, and then the advance processing is performed in the order of the production order I, the production order G, the production order F, and the production order D in the order of higher priority. Is performed, and when the landslide of the in-process production order is completed, the landslide of the unprocessed production order is performed, and the filling rate becomes 100% as much as possible from the (N−1) th day to the (N + 2) th day. In this way, a landslide that prioritizes abilities is performed.
[0142]
By performing the landslide treatment in this way, it is possible to eliminate a state where the filling rate of the bucket per day exceeds 100% in a certain manufacturing process, and to level the load on the manufacturing capacity of the equipment. However, when the manufacturing start time is changed by the mountain landslide processing, propagation processing for changing the manufacturing start time of the upstream and downstream processes is performed on the changed manufacturing order.
[0143]
In this propagation process, for example, as shown in FIG. 23, the first advance process is performed in a certain process C for a certain manufacturing order, and the manufacturing start time TP represented by ◎ before the landslide process is performed. _C Is postponed and the production start time TP indicated by ● _C 'Will be described.
In the upstream process B of the process C, the production start time TP before the landslide process is performed. _B Is the postponed manufacturing start time TP of the process C _C 'To the longest lead time LTC for the process B on the upstream side of the process C _ML Is earlier than the time after subtracting, and the lead time is changed to the longest lead time LTC. _ML Since the above-described fourth lead time arrangement cannot be satisfied, the process proceeds from step S74 to step S77 through step S76 in the above-described processing of FIG. It is determined whether there is a cycle chance of the same product type in the process B in the lead time direction, that is, in the future, and in this case, the production start time TP advanced in the process C is determined. _C 'To the longest lead time LTC _ML Cycle chance CY of the same product type after subtracting _B , This time is referred to as the manufacturing start time TP of the process B. _B 'As cycle chance CY _B Is assigned to the bucket corresponding to.
[0144]
Next, the propagation process is also performed for the downstream process D of the process C, and the manufacturing start time TP before the landslide process of the process D is performed. _D Is the postponed planned start time TP of the process C _C 'Is the shortest lead time LTD of process D _MS Is earlier (past side) than the time at which is added, and the shortest lead time LTD _MS Is not satisfied, and the above-described sixth lead time arrangement is not satisfied. In the processing of FIG. 11 described above, the process shifts from step S84 to step S88, and the shortest lead time LTD _MS From the future to the cycle chance of the same product type in the process D, and the manufacturing start time TP postponed in the process C _C 'Is the shortest lead time LTD _MS Cycle chance CY of the same product type _D Therefore, this time is referred to as the manufacturing start time TP in the process D. _D 'As cycle chance CY _D Is assigned to the bucket corresponding to.
[0145]
Next, the process proceeds to step S89, in which the propagation process of the upstream process is not completed, so that the process proceeds to step S90, where the process A, which is one upstream from the currently set upstream process B as the upstream process, is performed. After the setting, the process proceeds to step S92, and the propagation process to the downstream process has not been completed. Therefore, the process proceeds to step S93, and the process one downstream from the currently set downstream process D as the downstream process is performed. After setting E, the process proceeds to step S95, in which it is determined whether all the propagation processes have been completed. Since not all the propagation processes have been completed, the process returns to step S72.
[0146]
Therefore, in the upstream process A, the manufacturing start time TP before the landslide process is performed. _A Is the manufacturing start time TP of the process B changed in the above-described propagation process. _B ′ To the longest lead time LTB for process A on the upstream side of process B _ML Is located on the future side from the time obtained by subtracting, and satisfies the fourth lead time arrangement. Therefore, the flow shifts from step S74 to step S75 to set the upstream propagation process end flag FU to “1” and then execute the upstream process. The process of propagating to A ends, and the process moves to step S81.
[0147]
In the downstream process E, the shortest lead time LTE for the upstream process D is similar to the process D described above. _MS Cannot be satisfied, the process proceeds to step S88 via steps S82 and S84, and the shortest lead time LTE _MS To search for a cycle chance of the same product type in the process E from the future to the manufacturing start time TP postponed in the process D _D 'Is the shortest lead time LTE for the upstream process D of the process E _MS Cycle chance CY of the same product type _E Therefore, this time is referred to as the manufacturing start time TP of the process E. _E 'As cycle chance CY _E Is assigned to the bucket corresponding to.
[0148]
At this stage, the upstream-side propagation processing end flag FU is set to “1”, but the downstream-side propagation processing end flag FD is still reset to “0”. Are sequentially performed only when the downstream-side propagation process end flag FD is set to “1”, it is determined that the propagation process has been completed for all the processes for a certain manufacturing order, and the remaining mountain landslides are determined. The above-described propagation processing is repeated for the target production order, and when the propagation processing has been completed for all the landslide target production orders, the propagation processing of FIG. 11 ends.
[0149]
Then, in this way, the manufacturing start time TP _i Is changed, the production start time of the process i is allocated so that the shortest lead time can be secured while keeping the lead time below the longest by the propagation process accompanying the process, and the production process in the process other than the process i is started by the propagation process. For the production order whose time has moved, a certain restriction is imposed on the subsequent landslides in the processes other than the process i.
[0150]
In other words, when the allocation of the manufacturing start time in all the steps of the manufacturing order is completed by the landslide processing and the propagation processing, the manufacturing start time at which the angle is completed by the propagation processing caused by the landslide of another manufacturing order or another process Is disturbed. In order to prevent this, first, the process of locking the allocation result of the manufacturing start time of the certain manufacturing order in the process targeted for the landslide is performed.
[0151]
This lock processing includes equipment lock processing for locking in equipment units, cycle lock processing for enabling lock in cycle chance units in equipment, and production order lock processing for enabling lock in production order units. An input from the information processing terminal 3 can be appropriately selected by an artificial operation.
Then, as shown in FIG. 24, as a result of the landslide performed by, for example, a third tandem cold mill 3TCM which is a facility constituting the cold rolling COLD process, the production start time TP at the cycle chance CY1 _CM Is performed, the third tandem cold mill 3TCM, which is a facility constituting the cold rolling COLD step, is the earliest possible start time T for the constraint. _PCE And the latest possible start time T _PCL Is performed by changing the manufacturing start time TP for the process upstream of the cold rolling COLD process. _CM 24, the constraint-considered latest start possible time T indicated by a line L7 shown by a thin line in FIG. _PCL Is updated and set, and the production start time TP is set for the downstream process. _CM 24, which follows the flow of time with the shortest lead time. _PCE Is updated and set.
[0152]
Therefore, in the third tandem cold mill 3TCM, it is not possible to change the allocation position of the manufacturing start time of a certain manufacturing order, it is not possible to transfer from another facility by alternative transfer, and it is also impossible to change the cycle chance CY1. It becomes. On the other hand, in the upstream process of the third tandem cold mill 3TCM, the earliest possible start time T for the constraint consideration indicated by the line L2 shown by the dashed line is shown. _PCE And the latest start time T considering the updated constraint shown by the line L7 shown by the thin line. _PCL , The production start time of a certain production order can be allocated only. On the other hand, in the downstream side process, the earliest possible start time T considering the updated constraint shown by the line L8 shown by the two-dot chain line is considered. _PCE And the constraint-considered latest start possible time T indicated by the line L3 shown by the thin line. _PCL And the production start time of a certain production order can be assigned only to.
[0153]
As described above, in the above embodiment, the longest lead time LT _ML Since the production start time is assigned to the cycle chance of the same product type of a production order as shown below, for example, after completion of hot rolling, it is necessary to start pickling within a predetermined time If it takes more time, the specified time will be exceeded, and the necessity will not be satisfied.In addition, even if there is no facility to temporarily surpass heat insulation etc., the lead time will be the longest lead time. LT _ML It is possible to create an optimal production plan that can secure stable quality while preventing troubles during manufacturing and save energy.
[0154]
In addition, when performing landslide processing, select whether to perform capacity priority allocation processing or delivery date priority allocation processing depending on whether or not it is a bottleneck facility, and further preferentially landslide in-process production orders, Since the landslide of the unfinished manufacturing order is performed and the landslide method is selected in accordance with the landslide, the optimum landslide corresponding to the facility targeted for the landslide can be performed.
[0155]
In this way, the general operator creates a rough production plan for the work-in-progress and the new production order, and stores the result in the production plan file 20e. Can review the production plan.
The review of the production plan by the responsible operator is set in advance so that the operable processes for each responsible operator do not overlap with each other. Therefore, each responsible operator individually logs in to the information processing terminals 3A to 3D with the name of the responsible operator. By executing the production planning process shown in FIG. 5 after that, the production plan of the process that can be handled by each operator in charge can be refined.
[0156]
In this case, the production plan is reworked, for example, there is a landslide process and a cycle calendar editing process.
Now, as shown in FIG. 25, the manufacturing process at the steel mill includes a steelmaking process, a hot rolling (hot rolling) process, a hot rolling finishing (hot finishing) process, a first cold rolling (1 cold) process, The process is divided into two cold rolling (two cold) processes and a stainless steel (SUS) process, and the general operator carries out a pile process, a landslide process, and a propagation process for each process indicated by a circle in the “general” column of FIG. Processing and cycle calendar editing processing are enabled.
[0157]
On the other hand, the operator in charge of the first cold rolling process performs the landslide process for the portion indicated by a circle in the “one cold” column of FIG. Propagation processing and cycle calendar editing processing can be performed, but it is not possible to perform such processing for other steelmaking steps, hot rolling steps, second cold rolling steps, and stainless steel steps. Only the pickling (1 PK) in the hot-rolling finishing process represented by the symbol ● is set so that the cycle calendar cannot be edited, but can be crushed.
[0158]
Further, the operator in charge of the second cold rolling process is a part indicated by a circle in the “two cold” column of FIG. 25, that is, the processing of 5PK to 3CGL and BAF for the second cold rolling process in charge of himself. Can perform landslide processing, propagation processing, and cycle calendar editing processing, but cannot perform such processing for other steelmaking processes, hot rolling processes, first cold rolling processes, and stainless steel processes. The pickling (1 PK) in the hot rolling finishing process, which is the only process indicated by ●, is set so that only landslides can be performed.
[0159]
Further, the operator in charge of the stainless steel process is a part indicated by a circle in the “SUS” column of FIG. 25, that is, SCM and CAP of the stainless steel process, CBL to 2CGR of the second cold rolling process, and the first cold rolling process. BAF is set to be able to perform landslide processing, propagation processing, and cycle calendar editing processing. The third tandem cold mill 3TCM and the third continuous annealing equipment 3CAL of the second cold rolling process represented by the mark ● Is set to be able to perform a landslide process and a propagation process, and it is not possible to perform those processes for other processes.
[0160]
In FIG. 25, for the steps marked with a circle in the “Silk constraint” column, the cycle calendar can be adjusted by editing the cycle calendar. In FIG. 25, blank areas are facilities that are not covered by the monthly production plan.
On the other hand, for the production order, the operator in charge of the first cold rolling step is set to be editable for the production order passing through the first cold rolling step, and the production order passing the second cold rolling step is set to be editable. (2) The operator in charge of the cold rolling process is set to be editable, and the operator in charge of the stainless steel process is set to be editable for the production order passing through the stainless steel process. For the same production order, it is set so that only the general operator or one operator in charge can edit the production plan. However, when both the operator in charge of the second cold rolling process and the operator in charge of the stainless steel process can edit the cycle calendar, as in the case of the BAF in the second cold rolling process, the production plan is determined in bucket units of the cycle calendar. An operator in charge that can be edited is set, and the cycle calendar can be edited if the operator assigned to this bucket and the operator of the production order assigned to this bucket match. It is a mechanism that is done.
[0161]
Therefore, as shown in FIG. 26A, a bucket BK2 for SUS409 in the stainless steel process is set next to a bucket BK1 for the thin material in the second cold rolling process, as shown in FIG. Subsequently, in a state where the bucket BK3 for the quasi-thick material in the second cold rolling step is set, the operator in charge of the second cold rolling step logs in to the server 2 with the name of the responsible operator in FIG. When the production planning process is executed in the execution mode and the general operator is not performing the production planning process, the process proceeds from step S1 to step S26 through steps S22, S23 and S25 in the process of FIG. If the editing process has been selected, the process proceeds to step S27b, where the cycle It will execute the Nda editing process. At this time, since the user himself / herself has the editing authority for the buckets BK1 and BK3, he can freely move, copy, and enlarge / reduce the bucket. However, the start point of the bucket BK2 is delayed so that the bucket BK1 is deleted. If it is desired to extend the bucket BK1 by delaying the starting point, when the bucket BK2 is selected, the name of the authorized person set in the bucket BK2 and the name of the operator in charge who logged in are different. The process proceeds from step S115 to step S116, in which guidance information indicating that there is no adjustment authority, the name of the general operator having the adjustment authority, and the name of the operator in charge of the stainless steel process are displayed on the display 3b.
[0162]
For this reason, the operator in charge of the second cold rolling process adjusts the shrinkage of the bucket BK2 in the direction of delaying the start time of the bucket BK2 to the general operator or the operator in charge of the stainless steel process by means of verbal or telephone or e-mail. When the requesting operator is informed and the requesting operator understands, for example, the information processing terminal 4D is used to log in to the production planning process with the name of the operator in charge, and then the execution mode is selected, and the cycle calendar editing in step S27b is performed. By performing the processing, the start time position of the bucket BK2, that is, the start end is dragged with the mouse 3d and moved to the end, thereby reducing the cycle chance display. As a result, the starting end of the bucket BK2 contracts to the right as shown in FIG. 26B, and a blank portion is created between the bucket BK1 and the bucket BK1. Therefore, after that, the operator in charge of the second cold rolling step drags the end time position of the bucket BK1, ie, the end portion, with the mouse 3d to move to the start end position of the bucket BK2, as shown in FIG. 26 (c). , The time period of the cycle chance can be increased.
[0163]
Next, the cycle calendar editing process will be specifically described. For example, the general operator reads the production plan stored in the production plan file 20e by performing a mountain slide, accumulates the required production time for each process from the cycle setting line for each production order, and stores the daily production time for each process. When the operation rate of each unit is calculated, and the operation rate of each process is represented by a diagram in which time is plotted on the horizontal axis and the operation rate is plotted on the vertical axis, the results are as shown in FIG. .
[0164]
In FIG. 16, in the third tandem cold mill 3TCM, the operating rate exceeded 100%, that is, the facility capacity on the 13th and 15th days, and the facility capacity was exceeded on the 12th, 14th and 16th days in the third continuous annealing furnace 3CAL. Is over. On the other hand, as shown in FIG. 17, the third tandem cold mill 3TCM has a large in-process inventory on the 12th and 14th days, and the third continuous annealing furnace 3CAL has an in-process inventory on the 13th. More.
[0165]
If the excess capacity of the equipment is due to, for example, no cycle chance for high-tensile steel in the third tandem cold mill 3TCM in the cycle calendar and this high-tensile steel is a material that cannot be properly arranged, As shown in FIG. 27, when the shortest lead time is accumulated from the delivery date to the upstream process, the cycle chance of the third tandem cold mill 3TCM is actually reduced due to the limitation of the cycle chance in the third tandem cold mill 3TCM. The cycle setting line shown by the dashed line is set in the shortest time from the existing position to the downstream process, and the production order of high-tensile steel concentrates on the cycle chance, and the production timing in each process of each production order That the parts that are connected by lines are dense and partially overlapped. To. As shown in FIG. 16, when the required manufacturing time is accumulated for each facility, the facility capacity exceeds the capacity of the third tandem cold mill 3TCM on the 13th.
[0166]
If the production timing at a certain facility with a production order group of a certain product type is concentrated on a certain cycle opportunity, it may not be possible to adjust the process simply by automatically performing the landslide process. The operator in charge adjusts the cycle chance in real time, that is, edits the cycle calendar to make fine adjustments.
[0167]
At this time, the operator in charge adjusts the cycle chance based on the operation rate in FIG. 16 and the in-process stock amount in FIG. That is, in the operation rate verification chart of FIG. 16, there is almost no production schedule on the third tandem cold mill 3TCM and the third continuous annealing furnace 3CAL on the 6th and 7th days, and the tendency of increase of the in-process inventory is also shown in FIG. In addition, since the third tandem cold mill 3TCM has an increasing tendency from about 8 days, and the third continuous annealing furnace 3CAL has an increasing tendency from about 10 days, the operator in charge of the third tandem cold mill 3TCM is vacant on the 6th. It can be determined that this is possible by setting the cycle chance of the high-tensile steel that originally had no cycle chance on the 7th. Similarly, the cycle opportunity on the 12th and 13th days of the third continuous annealing furnace 3CAL can be determined. It can be determined that it is possible to delete and move the cycle chance on the 6th to 8th and the 10th and 11th days.
[0168]
In order to perform the cycle calendar adjustment, the information processing terminal 3 provided for each process accessible to the production plan management system 2A of the server 2 executes a cycle chance real-time adjustment process shown in FIG.
In the real-time adjustment process of the cycle chance, first, the cycle calendar before adjustment shown in FIG. 4 is displayed on the display 3b. Adjust the cycle chance display on the displayed cycle calendar. Here, as shown in FIG. 28, new cycle chances HT1, HT2, and HT3 for high-tensile steel are formed in the third half of the third tandem cold mill 3TCM on the second half of the fifth day, the first half of the sixth day, and the second half of the seventh day. In addition, the non-allocated portion of the cycle chance of the product D on the ninth day shown in FIG. The cycle chance unallocated part of the product N and O on the 12th, the cycle chance unallocated part of the product T on the 14th, and the cycle chance unallocated part of the product V on the 15th are deleted.
[0169]
Further, in the third continuous annealing furnace 3CAL, a description will be given below by comparing FIG. 4 with FIG. 28, but the allocation of the cycle chances of the 409 system and the 430 system on the 12th and 13th is deleted, and The cycle chance is set in the latter half of the day, and the cycle chance of a product type called BB on the 16th is changed to a cycle chance including high-tensile steel and the time zone is shortened.
[0170]
Such adjustment of the cycle chance is performed by left-clicking the cycle opportunity display with a mouse when a new cycle opportunity is created, and when a cycle opportunity of a corresponding product type exists in the vicinity thereof, The cycle chance can be copied by selecting the cycle chance, dragging the mouse to the desired time position, and selecting copy. To change the start time or end time of the copied cycle chance, left-click the start time or end time of the copied cycle chance with the mouse, and drag the mouse to the target time in this state to display the cycle chance display. By scaling, the start or end time can be changed. At this time, by performing selection processing for each of the cycle chances displayed in parallel, it is possible to simultaneously select and perform editing processing such as enlargement / reduction, copying, moving, deleting, and changing the corresponding product type. Similarly, by performing selection processing for each of the cycle chances related before and after, it is possible to simultaneously select and perform editing processing such as enlargement / reduction, copying, movement, deletion, and change of the corresponding product type.
[0171]
Further, if the delete key is pressed without dragging the mouse with the cycle chance selected, the cycle chance display can be deleted. Furthermore, by right-clicking the mouse 3d without selecting a cycle chance, a new cycle chance of a predetermined size can be created. In this case, the cycle type is set by inputting from the keyboard 3c. , Start time and end time.
[0172]
The cycle calendar editing process is repeated until the adjustment of the cycle chance display of the cycle calendar displayed on the display 3b is completed and the enter key of the keyboard 3c is pressed, for example. The process proceeds from step S102 to step S103, where a pre-check process is performed to determine whether or not this is appropriate. At this time, if a new cycle chance is just created or copied, there will be no problem because the number of new cycle opportunities will increase, but the start time and end time of the cycle chance will be changed, and the cycle chance will be moved or deleted. In the case of performing, the cycle setting line is formed using the changed cycle chance, the available cycle chance disappears, and a material that cannot be properly arranged that exceeds the delivery date occurs, If there is a lock facility whose position change is prohibited in the cycle setting line, it may be necessary to change the lock position.When these cases occur, the cycle calendar editing process is Judgment is inappropriate, and guidance information to the effect that material that cannot be properly placed or that the lock position cannot be observed will be displayed. Back from displayed on Lee 3b in step S101, performs the editing process again cycle calendar.
[0173]
On the other hand, if the occurrence of the unplaceable material or the change of the lock position does not occur in the pre-check process, it is determined that the editing process of the cycle calendar has been properly performed, and the process proceeds to step S105, where the cycle calendar file is deleted. The cycle calendar stored in 20d is overwritten, and the edited result of the cycle calendar is reflected on the cycle calendar.
[0174]
In this way, when the editing result of the cycle calendar is reflected in the cycle calendar, it is determined whether or not there is a properly unplaceable material that is not properly placed in the cycle calendar so far, and the inappropriately unplaceable material is determined. If not, the process directly proceeds to the reference time calculation process. If there is a material that cannot be properly arranged, the operator in charge finely adjusts the cycle chance again, or adjusts the cycle chance with the newly edited cycle chance. It is judged by a human system whether or not it is possible to manufacture unplaceable materials, and if manufacturing is possible, it is rescued by manually re-inputting the unplaceable materials as the appropriate placed materials, and then the reference time calculation process Move to
[0175]
In the reference time calculation process, as shown in FIG. 7 described above, the earliest possible start time is set with the shortest lead time from the manufacturing start time according to the process order, and these are set to the line L1 and the cycle in the facility to be passed. The earliest possible start time is set in consideration of the constraint of chance, and a line L2 connecting them is set, and a latest start possible time is set with the shortest lead time from the delivery date, and these are set back from the line L3 and the delivery date. In this manner, the earliest possible start time is set while considering the cycle chance while satisfying the cycle chance constraint, and a line L4 connecting these is set.
[0176]
Next, retroactively from the delivery date, the production start time in each process is assigned with the standard lead time in consideration of the cycle chance. At this time, as shown in FIG. 9 described above, when the cycle chance in a certain process is adjusted in real time, and before and after the process, it is possible to secure the same position as the pile position before the change of the cycle chance. The same stacking process is performed to allocate the manufacturing start times so as to be at the same stacking position. That is, in FIG. 9, when the start time of the cycle chance C31 is extended to the past side as shown by the one-dot chain line, the process on the downstream side with respect to the process is limited to the time that the cycle chance is not lost in the lead time. In the case where the start time is allocated with the shortest lead time, and the start time before the cycle chance change can be maintained for the downstream process, that is, when the start time before the cycle chance change is not set, the disclosure time is set to the start time before the cycle chance change. To maintain.
[0177]
By performing such a stacking process at the same position, it is necessary to review the start time of the process upstream of the facility where the cycle chance has been adjusted, but the start time of the process downstream of the process where the cycle chance has been adjusted is required. This eliminates the need to review and can simplify the landslide process.
By performing the above-described cycle calendar editing processing, as shown in FIG. 29, regarding the equipment capacity, the excess of the equipment capacity on the 13th of the third tandem cold mill 3TCM on the 13th is resolved, and this is reduced to 5-7 days. Transfers will reduce the excess of equipment capacity. Similarly, for the third continuous annealing furnace 3CAL, the excess of the facility capacity on the 14th is resolved, and the excess is transferred to the 5th to 11th. Moreover, as shown in FIG. 30, the in-process inventory amount of the third tandem cold mill 3TCM on the 12th is reduced, and the in-process inventory amount of the third continuous annealing furnace 3CAL is also the in-process inventory on the 13th. The amount has been reduced and leveled (there are days when the capacity is still in excess, but further adjustments will eliminate it).
[0178]
In this way, by editing the cycle calendar, it is possible to suppress the excess of the capacity utilization rate and to set the optimal cycle chance that can equalize the work-in-process inventory, and to optimize the production plan. Can be created.
In addition, when editing the cycle calendar, if the editing result results in improper placement or lock position observance, the display of guidance prevents the editing result of the cycle calendar from being reflected in the original cycle calendar Therefore, it is possible to reliably prevent a problem that a new production plan needs to be reworked depending on the editing result of the cycle calendar, and to easily create an accurate production plan in a short time.
[0179]
As described above, when the preset operator is executing the production planning process in the execution mode, the general operator having the editing authority for all the processes can execute the information processing device 3A or other available information processing. When logging in to the production planning process from the terminal with the name of the general operator and selecting the execution mode in the production planning process of FIG. 5, since another operator in charge is already in the production planning process, the process proceeds from step S4 to step S21. The guidance information indicating that the operator in use is in use and the execution mode is not possible is displayed on the display 3b.
[0180]
For this reason, the general operator recognizes that the editing process of the production plan stored in the production plan file 20e is impossible. However, the general operator edits the production plan assumed by the general operator. If you want to know immediately, select the simulation process. When the simulation process is selected in this way, the current production plan stored in the production plan file 20e is read out, a pile-up process, a mountain-strip process, and a cycle calendar editing process are performed based on the production plan, and the results are displayed on the display 3b. Can be performed. In this simulation process, the simulation result is not reflected in the current production plan stored in the production plan file 20e, and does not affect the editing process of the production plan currently executed by the operator in charge. No, but it is possible to save the simulation results. Therefore, even when one of the responsible operators is editing the production plan, the general operator can obtain a simulation result corresponding to the result of editing the production plan by the simulation processing. When it is desired to reflect this simulation result in the production plan stored in the production plan file 20e, when the editing process of the production plan by each responsible operator is completed, the user logs in with the name of the general operator, and in the production planning process of FIG. As the execution mode, a pile-up process, a mountain-strip process, and a cycle calendar editing process are executed, and the results are stored in the production plan file 20e.
[0181]
Further, even when the general operator and each operator in charge perform the production planning process of FIG. 5, when selecting the reference mode instead of the execution mode, the other operator in charge and the general operator are executing in the execution mode. Also, the production plan stored in the production plan file 20e can be displayed on the display 3d for reference.
In the above-described embodiment, the case where the present invention is performed on a production plan for a steel product has been described. However, the present invention is not limited to this. Can be applied to production planning.
[0182]
Further, in the above-described embodiment, a case has been described in which the bucket filling rate of the variable length bucket is displayed in color on the cycle calendar, but the present invention is not limited to this, and the bucket filling rate may be directly displayed as a numerical value. Good.
Further, in the above embodiment, the general operator and the responsible operator may be composed of a plurality of persons having the same editing authority, and in this case, the general operators and the responsible operators having the same editing authority may be simultaneously produced. It suffices to surely prevent the editing of the production plan from being performed so that only one person having the same editing authority can edit the production plan.
[0183]
Furthermore, in the above-described embodiment, the case where the manufacturing start time is allocated in consideration of the longest lead time in the pile processing, the landslide processing, and the propagation processing is described. Similarly, the production start time may be assigned retroactively from the delivery date by the standard lead time.
Furthermore, in the above-described embodiment, the case where the authority to execute only the landslide process, the propagation process, and the cycle calendar editing process in the process set in the work mode has been described, but is not limited thereto. Instead, it is possible to remove the operation authority of the cycle calendar editing process, disable the editing authority of a specific cycle chance of another process, or arbitrarily set the executable authority.
[0184]
Further, in the above embodiment, the case where the login screen is displayed and the login name and the password are input when executing the production planning process has been described. However, the present invention is not limited to this. Whether the operator is the general operator or the operator in charge may be determined based on the login name for the server 2 that is input when the apparatus is started, or a card reader such as an IC card or a magnetic card is connected to the information processing terminals 3A to 3D. And inputting the identification information wirelessly from a portable information terminal such as a mobile phone using a short-range wireless communication interface.
[0185]
【The invention's effect】
As described above, according to the first aspect of the present invention, the production plan creation unit includes the information processing terminal capable of accessing the production plan creation unit. Since it is configured to set the available means of the cycle calendar management means, the pile means, and the landslide means based on, it is possible to limit the means available for each operator in charge of the information processing terminal, It is possible to prevent a plurality of operators from accessing the production plan of the same product at the same time, and to create the production plan accurately.
[0186]
According to the second aspect of the present invention, since the landslide means includes a propagation process for reflecting the landslide result in the preceding and succeeding steps, the landslide result of a certain step can be reliably transmitted to the preceding and following steps. To create an accurate production plan.
Further, according to the third aspect of the invention, the production plan creation unit is configured to perform, in addition to the cycle calendar management means, the pile means, and the collapse means, a production plan equivalent to the sialk calendar management means, the pile means, and the collapse means. Since the simulation which is not reflected is performed and the simulation means is provided, the production plan can be simulated using the simulation means while another operator in charge is executing the production plan.
[0187]
Still further, according to the invention according to claim 4, the production plan creation unit sets an operator in charge who can handle each of the production order and the cycle chance for each equipment included in the cycle calendar, and sets the same. Since only the assigned operator can edit the production order and the cycle chance, it is possible to prevent the production order and the cycle chance from being changed carelessly and to prevent the production plan from being broken. be able to.
[0188]
Still further, according to the invention according to claim 5, the cycle calendar management means, the pile means, the landslide means and the simulation means can be edited in the general operator mode, and at least the landslide means can be edited for each equipment in the assigned operator mode. Therefore, in the assigned operator mode, it is possible to perform editing processing on different facilities at the same time, and it is possible to efficiently create a production plan in a short time.
[0189]
According to the sixth aspect of the present invention, when one of the general operator mode and the assigned operator mode is set, execution of the other mode is prohibited. Can be reliably prevented.
Furthermore, according to the invention according to claim 7, when the assigned operator mode is set, the execution of the assigned operator mode of different equipment is permitted, so that the plurality of assigned operator modes are simultaneously executed on different equipment to produce the same. A plan can be efficiently created in a short time.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a file configuration in a host computer.
FIG. 3 is an explanatory diagram showing a variable length bucket forming procedure in a cycle calendar.
FIG. 4 is an explanatory view showing a cycle calendar.
FIG. 5 is a flowchart illustrating an example of a production planning process executed by the information processing terminal.
FIG. 6 is an explanatory diagram showing an example of a standard table used for a production planning process.
FIG. 7 is a diagram provided for explanation of a reference time setting process.
FIG. 8 is a flowchart illustrating an example of a stacking process.
FIG. 9 is a diagram provided for explanation of a stacking process.
FIG. 10 is a flowchart illustrating an example of a mountain crushing process.
FIG. 11 is a flowchart illustrating an example of a propagation process.
FIG. 12 is an explanatory diagram of an allocation state in a stacking process.
FIG. 13 is an explanatory diagram of another allocation state in the stacking process.
FIG. 14 is a flowchart illustrating an example of a real-time adjustment process of a cycle chance.
FIG. 15 is a flowchart illustrating an example of a cycle calendar editing process.
FIG. 16 is an explanatory diagram showing an operation rate in units of one day before a landslide.
FIG. 17 is an explanatory diagram showing a work-in-process stock amount per day before a mountain collapse.
FIG. 18 is an explanatory diagram of a forward moving process in the mountain crushing process.
FIG. 19 is an explanatory diagram of a first advance process in a mountain-eroding process.
FIG. 20 is an explanatory diagram of a second advance process in the mountain-eroding process.
FIG. 21 is an explanatory diagram of an alternative transfer process in the mountain landslide process.
FIG. 22 is an explanatory diagram showing a pile-up state and a re-allocation state based on the earliest possible start time of constraint consideration in the capability priority allocation processing.
FIG. 23 is a diagram provided for explanation of a propagation process.
FIG. 24 is a diagram provided for explanation of a lock process.
FIG. 25 is a diagram showing an editable process of a general operator and a responsible operator.
FIG. 26 is a diagram provided for explanation of cycle chance adjustment.
FIG. 27 is a diagram provided for explanation of a stacking process of materials that cannot be arranged properly.
FIG. 28 is a diagram showing a display state of a cycle calendar after editing.
FIG. 29 is an explanatory diagram showing an operation rate on a daily basis after the cycle calendar is edited.
FIG. 30 is an explanatory diagram showing the in-process stock amount per day after the cycle calendar is edited.
[Explanation of symbols]
1 Host computer
2 Server
2A Production plan management system
3A-3D information processing terminal
3a Information processing terminal body
3b display
3c keyboard
3d mouse
4 Local area network
11 Demand order registration file
12 Production order association file
13 Production order data registration file
14 In-process inventory information file
20a Data operation processing unit
20b standard table
20c Process table
20d cycle calendar file
20e Production plan file
20f display
21 Parts data definition file
22 Parts list definition file
23 Manufacturing process order list file
24 Equipment list definition file
25 Alternative equipment setting definition file
26 Cycle process order setting definition file
27 Cycle equipment setting definition file

Claims (7)

In a production plan creation system for creating a production plan in the case of sequentially producing a product in a plurality of production facilities constituting a plurality of production processes, a cycle calendar in which the production timing of the product is set in each production facility is created and edited. Cycle calendar management means for performing, stacking means for stacking the required production time of the product based on the cycle calendar created by the cycle calendar management means, and collapse of the manufacturing capacity excess process based on the stacking result of the stacking means A production plan creating unit for creating a production plan having at least a landslide means, and accessing the production plan creation unit to use the cycle calendar management means, the pile means, and the landslide means to create a production plan. A plurality of information processing terminals to be created, and wherein the production plan creation unit includes the plurality of information processing terminals. Et entered unique identification information said cycle calendar management means based on, pile unit, mountain breaking production planning system, characterized in that it is configured to set the available means of the unit. 2. The production plan creation system according to claim 1, wherein said landslide means includes a propagation processing function for reflecting a landslide result in preceding and succeeding processes. The production plan creation unit performs a simulation that is not reflected in the production plan by having functions equivalent to the cycle calendar management means, the pile means, and the collapse means, in addition to the cycle calendar management means, the pile means, and the collapse means. 3. The production plan creation system according to claim 1, further comprising a simulation unit. The production plan creation unit sets an operator in charge that can handle each of the production order and the cycle chance for each equipment included in the cycle calendar, and only the set operator in charge edits the production order and the cycle opportunity. The production plan creation system according to any one of claims 1 to 3, wherein the production plan creation system is configured to be capable of: The production plan creation section includes a general operator mode in which a general operator capable of editing the cycle calendar management means, the pile means, the mountain crushing means, and the simulation means, and an operator mode in which the mountain crushing means can be edited for each equipment. The production plan creation system according to any one of claims 1 to 4, wherein the production plan creation system is configured to be settable. The said production plan preparation part is comprised so that execution of the other mode may be prohibited when any one of the general operator mode and the responsible operator mode is performed. Production planning system. 7. The production according to claim 5, wherein the production plan creation unit is configured to allow execution of the assigned operator mode of a different facility when the assigned operator mode is set. 8. Planning system.

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