JP2011233061A - Production object range setting device and production object range setting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production object range setting device capable of optimizing an inventory and resolving a processing delay when a range of objects for which a production plan is to be prepared is set in a production process where steel plates are transported in discontinued processing and an inventory is retained immediately before each processing process.SOLUTION: This production object range setting device selects target orders from among all the received orders in the order of an early delivery time the selected target orders correspond to a tapping quantity during a predetermined period (Step S11), sets an optimal inventory amount throughout the predetermined period in connection with the target orders on the basis of multiple object range determining parameters such as inventory situations, processing abilities and delivery dates of multiple types of steel plates (Step S12), by comparing the set optimal inventory amount throughout the predetermined period with an inventory amount of work-in-progress, modifies the selected amount of the target orders and sets the target range for which the plan is to be made (Steps S13 to S19).

Description

  The present invention relates to a production target range setting device and a production target range setting method suitable for efficiently setting a target range when a plan for producing a thick plate is created in comprehensive factory management of the steel industry.

  Generally, in the steel industry, product varieties, delivery dates, and the like are made by customers as various orders. These order orders are a variety of products with different types of products (for example, standards) and dimensions, one by one, and such various orders must be delivered to customers before delivery. Therefore, traditionally in comprehensive factory management in the steel industry, a computer-aided production plan is created to create an efficient production plan while ensuring delivery times according to various orders received from customers. A technique has been proposed (see, for example, Patent Document 1).

JP 2007-122172 A

  In the technique described in Patent Document 1, in the initial conditions for creating a production plan, the amount of production corresponding to the examination section is handled as prior information, and on this assumption, the operator sets the production plan creation target range, Subsequent production plans are created with the aid of a computer (for example, paragraph 0014 of the same document). In other words, in the technique described in the document, the prior information such as the production amount corresponding to the examination section is selected by the operator as the prior information from the order list from the viewpoint of delivery date / standard / quantity.

  However, in a processing process of a thick plate (for example, a steel plate having a thickness of 6 mm or more), there are some types in which a plurality of types of steel plates are conveyed to a plurality of processes in a discontinuous process. In that case, the inventory stays immediately before the plurality of processes. Further, in the processing process of thick plates, when each process is performed in a discontinuous process, various plate thicknesses flow at the same time, which makes management more difficult. In other words, when the operator determines the target order from the order list, the actual situation is that the operator manages the order by the number and weight of the orders regardless of the plate thickness.

  Therefore, the operator selects the target order according to the examination section as prior information from the various orders received as described above based on the standard, delivery date, quantity, etc., and based on this target order. Even if the production plan creation target range is set, the prior information setting itself includes experience and skill, so the stock retention status immediately before each process depends on the initial target order setting. Will do.

  In other words, when an operator selects a sales order that is more than the optimal stock quantity for the entire predetermined period (consideration section) as the target order for the operator to determine the target order from the order list, the process of a certain process exceeds its processing capacity. As a result of starting the manufacturing, even if the subsequent production plan is the best, there is a problem that the in-process inventory is accumulated immediately before the processing process.

On the other hand, if the target order that should be started for production is leaked, it is necessary to start manufacturing for the next day, for example, the next day or after, or if it is necessary to deal with emergency processing, interrupt processing must be performed. It is not possible to reduce the work efficiency.
Therefore, there is still room for consideration in creating an efficient production plan while ensuring a delivery date in accordance with various orders received from customers under the initial conditions for creating a production plan. In particular, such a problem is prominent in a production process in which a plurality of types of steel plates are transported to a plurality of processes in a discontinuous process and the stock stays immediately before each process, as in the processing process of thick plate production described above. It is.

  Accordingly, the present invention has been made paying attention to such a problem, and a plurality of types of steel plates are transported to a plurality of processes in a non-continuous process, so that the stock is immediately before the plurality of processes. Production target range setting device and production target that can automatically select the target order to start manufacturing when setting the production plan creation target range in the production process where stagnation occurs The purpose is to provide a range setting method.

  That is, in order to solve the above-mentioned problem, the first invention of the present invention is that stocks are retained immediately before the plurality of processes by conveying a plurality of types of steel plates to a plurality of processes in a non-continuous process. A production target range setting device that sets a target range when creating a production plan for the steel sheet according to an order received from a customer. Target order selection means for selecting as a target order a sales order corresponding to the amount of steel output for a predetermined period in order, and each stock status of the plurality of types of steel plates for the target order selected by the target order selection means Information, each processing date information, and each processing efficiency information is calculated based on a plurality of target range determination parameters, and the in-process inventory amount in the predetermined period is predicted and calculated Based on the comparison between the in-process inventory amount on the last day in the predicted in-process inventory amount and the optimum inventory range for each process set in advance, the selection amount of the target order is corrected in order for each process. A plan creation target range setting means for setting a plan creation target range, wherein the plan creation target range setting means sequentially determines the in-process inventory amount on the last day of the selected target order for each of a plurality of processes. When the range of the optimal stock quantity in the process is exceeded, a new target order is created by excluding a sales order corresponding to the amount of steel output that has exceeded the target order from the target order in the order of late delivery. If the in-process inventory quantity on the last day of the selected target order is less than the optimum inventory quantity range in the process, the selected order is still selected. The sales order corresponding to the tapping quantity then is less than said at an early sales orders of delivery a sales order which is not and sets a new target orders in addition to the subject order.

  Here, in the production target range setting device according to the first aspect of the present invention, the production target range setting device further includes a date target order setting means for setting an optimal target order for each date of the predetermined period, The due date quantity setting means for setting the due date quantity of the corresponding selected target order, and the range of the optimum inventory quantity set in advance for each due date and the due date quantity corresponding thereto are compared. A due date order correcting means for correcting the selection amount of the target order for each day, and the due date order correcting means, when the due stock quantity corresponding to each due date exceeds the range of the optimum inventory quantity, the selection The target orders that have a due stock quantity that is less than the optimum stock quantity range in order from the due date in the order close to the due date are added to the surplus orders before the due date. It is preferred that the appropriated way then you set a new target order.

  In addition, the second invention of the present invention is used in a production process in which inventory stays immediately before the plurality of processes by transferring a plurality of types of steel plates to a plurality of processes in a non-continuous process, and a computer Based on the processing, when creating the production plan of the steel sheet according to the order received from the customer, it is a method of setting the target range, and for a predetermined period from the entire order received in the order of early delivery date A target order selection step of selecting a sales order corresponding to the amount of steel output as a target order and inputting it to a computer, and for each target order selected in the target order selection step, each stock status information of the plurality of types of steel plates In-process inventory in the predetermined period based on a plurality of target range determination parameters that at least consider each processing date information and each processing efficiency information Based on a comparison between the in-process inventory quantity on the last day in the predicted in-process inventory quantity and the preset optimum inventory quantity range for each process, and the selected quantity of the target order is calculated for each process. And a plan creation target range setting step for setting a plan creation target range in order, and the plan creation target range setting step is a work in progress on the last day of the selected target order in order for each of a plurality of processes. When the stock quantity exceeds the range of the optimum stock quantity in the process, new orders are created by removing the order orders corresponding to the surging steel quantity from the target order in the order of late delivery from the target order. If the in-process inventory quantity on the last day of the selected target order is less than the optimum inventory quantity range in the process, A new target order is set by adding, to the target order, a sales order that is not yet selected from the orderers and that corresponds to the amount of steel output that is less than the next order with the earliest delivery date. To do.

  Here, in the production target range setting method according to the second aspect of the present invention, the method further includes a due date order setting step for setting an optimum target order for each due date of the predetermined period by a calculation process by a computer, and the due date order setting step includes: , The optimal stock amount setting step for setting the optimal stock amount for each date, and the range of the optimal stock amount for each due date set in advance and the corresponding due stock amount for each date, and the target order for each due date. A due date order correcting step for correcting the selected amount of the selected target order when the due stock amount corresponding to each due date exceeds the range of the optimal inventory amount. Target orders that have a due stock quantity that is less than the optimal stock quantity range in order from the due date And it is preferable to be devoted to accelerated due dates to set the new target order.

  According to the production target range setting device or the production target range setting method according to the present invention, a plurality of types of steel plates are conveyed to a plurality of processes in a non-continuous process, so that stock stays immediately before the plurality of processes. When setting the production plan creation target range in the production process, a new target order satisfying a predetermined condition can be sequentially set for each of a plurality of processes by a predetermined computer process for the order received.

  Therefore, it is possible to improve the accuracy of the processing capacity prediction by selecting the target order with no inventory optimization and no processing date delay. Therefore, according to the production target range setting device or the production target range setting method according to the present invention, automatically select the target order to be manufactured, compared to the contents of the target order setting that has been conventionally performed by the operator, The inventory can be further optimized and the in-process inventory can be reduced. Further, the processing day delay can be eliminated.

It is a block diagram explaining an example of the production process used as the object for which the production target range setting apparatus which concerns on this invention is used. It is a block diagram explaining the step at the time of preparing the production plan of a plank in comprehensive factory management of the steel industry. It is a block diagram explaining the structure of the production target range setting apparatus which concerns on this invention. It is a flowchart of the production object range setting process for every process performed with the production object range setting apparatus which concerns on this invention. It is a flowchart of the date optimization process performed in the production target range setting process for each process. It is a graph which shows an example of the relationship between the order delivery date in a predetermined period (examination section), and the order received selected by the production target range setting process according to this. It is a graph which shows the relationship between the date which should start manufacture, and the optimal stock quantity set beforehand. It is a graph which shows the image of the selection amount of the target order which should be corrected based on the comparison with the optimal inventory amount set beforehand and the inventory amount of the selected target order. Due to the due date optimization process, target orders that have a due stock amount that is less than the optimum stock amount in order from the nearest due date will be allocated to the surplus orders so that the due date will be advanced. It is a graph explaining the image which sets a suitable target order.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. FIG. 1 is a block diagram illustrating an example of a production process that is a target for which the production target range setting device according to the present invention is used. FIG. 2 is a block diagram for explaining steps in creating a plan for production of thick plates in comprehensive factory management in the steel industry.
The pig iron obtained from the blast furnace is sent to the converter after the preliminary treatment and refined, and further subjected to the secondary refining treatment, and then sent to the casting process P1 to form a slab as shown in FIG. Here, in the processing process of a thick plate (for example, a steel plate having a thickness of 6 mm or more), a plurality of types of steel plates are transported to a plurality of processing processes in a non-continuous process. Is a production process in which stagnation occurs.

  Specifically, as shown in the figure, in the hot rolling process P2 subsequent to the casting process P1, heating and rolling (hot rolling) treatment is performed for each manufactured slab to obtain a hot rolled steel sheet. The obtained hot-rolled steel sheet is sent to processes such as shearing process P3 and degassing process P4 depending on the sheet thickness according to various orders received from customers, and heat treatment process P5 is generated according to necessary processing. After passing through process process P6 etc. suitably, it is shipped (P8) through product process (mill end) P7 after that. Note that the processes P4, P5, and P6 are off-line processing, and this off-line processing is the main cause of stock retention.

  The manufacture of such products at the integrated steelworks is based on orders received from customers. However, there is a delivery date for orders, and it is necessary to increase production efficiency while lowering manufacturing costs under the constraints. Therefore, as shown in FIG. 2, first, a target order with a large production lot is set as prior information from the order received (planning target selection step (S1)), and then the corresponding slab is based on this target order. The production plan is prepared with the aid of a computer (elementary measurement step (S2)). Then, the charge organization plan is created with the aid of a computer (charge organization step (S3)). Based on this, the production start time (steeling time) of each type is set (steeling billing step (S4)), and each product is produced based on this production plan.

  Here, conventionally, in the planning target selection step (S1), the operator has selected the target order corresponding to the examination section based on experience as prior information. In the manufacturing process of such a product, a production target range setting device is provided that automatically selects a target order to start manufacturing so as to optimize the inventory and eliminate the delay in processing date.

  Specifically, as shown in FIG. 3, the production target range setting device 100 stores a control program for the CPU 50 and the like in advance in a predetermined area, and a CPU 50 for controlling the calculation and the entire system based on a predetermined control program. Storage device 62 and ROM 52, RAM 54 for storing data read from the storage device 62 and ROM 52, etc. and computation results required in the computation process of the CPU 50, an external device including a display device 64, an input device 60 and a database 66 An interface 58 that mediates input / output of data to / from the apparatus is configured, and these are connected to each other via a bus 56 that is a signal line for transferring data so that data can be exchanged. In the database 66, in addition to the received order information (delivery date information / standard information / size information / quantity information), information on target range determination parameters such as scheduled processing date information and processing efficiency information associated with the received order information. In addition, information on the optimal inventory quantity (to be described later) for each scheduled process (P1 to P6 in FIG. 1) is stored. Then, the CPU 50 starts a predetermined production target range determination processing program stored in a predetermined area of the storage device 62 or the ROM 52, and executes the production target range determination processing according to the program.

Next, the production target range determination process executed by the production target range setting device 100 will be described in detail with reference to FIGS. 4 and 5.
In the program in the planning target selection step (S1) described above, when the process proceeds to a production target range determination step (not shown), the production target range setting device 100 executes a production target range determination process. As shown in FIG. 4, in the production target range determination process, first, the process proceeds to step S <b> 11, referring to the order order information from the database 66, the order corresponding to the amount of steel output for one week in order of early delivery date. First, unconditionally (temporarily) the order is selected as the target order. In step S12, the optimum stock quantity and its range information are read for each scheduled process (P1 to P6 in FIG. 1) and set as information for comparison reference described later. The “optimum inventory range” is determined in advance according to each process based on experience such as past operating conditions.

In the subsequent step S13, the selected sales order (which becomes a provisional target order) is sorted by scheduled process (P1 to P6 in FIG. 1). Then, the estimated due date for processing the target order for each process is set by calculating backward from the delivery date. Since each process has a specific efficiency, the processable amount that can be processed every day is set according to the efficiency specific to each process.
FIG. 6 is a diagram showing an example of the first selected target orders sorted according to the scheduled process. In FIG. 6, a gas cutting process P3 (see FIG. 1) for cutting using a torch is shown. An example of a sales order is shown. Here, the processable amount varies from day to day. For example, in the case of gas cutting, the processing time varies greatly depending on the thickness of the steel plate of the target order (see the example in Table 2).

  Then, with reference to a plurality of target range determination parameters that take into account each stock status information, each processing date information, and each processing efficiency information of the steel plate from the database 66, the processable amount “every scheduled process / every day” To calculate. More specifically, as the target range determination parameter at this time, in addition to each stock status information of each steel sheet, each processing date information and each processing efficiency information, “planned process information, product size information, heat treatment temperature information, “Product unit weight information” is also referred to as a target range determination parameter.

Further, in this step S13, the in-process inventory amount for a predetermined period is predicted from the stock on the planned day. Then, for each date, the prediction calculation result is received and paid from the generated (scheduled) amount and the processable amount, and the change (forecast) of the inventory amount is graphed and displayed on the display device 64 so as to be visible to the operator. (Display example, see FIG. 7).
In the subsequent step S14, based on the calculation result of the in-process inventory amount in the above-described step S13, the prediction of the in-process inventory amount on the last day of the predetermined period is the range of the optimal inventory amount (information stored in step S12). It is determined whether or not it exceeds. The determination of the in-process inventory amount here is made on the last day of the predetermined period. That is, if the predicted value of the in-process inventory quantity on the last day of the predetermined period is less than the upper limit of the optimal inventory quantity (No), the process proceeds to step S15, and if it exceeds the upper limit of the optimal inventory quantity (Yes), the process proceeds to step S17. Transition.

  In step S15, based on the prediction calculation result of the in-process inventory quantity in step S13, it is determined whether or not the prediction of the in-process inventory quantity is less than the optimum inventory quantity range (step S12). That is, if the prediction of the in-process inventory quantity on the last day of the predetermined period does not satisfy the lower limit of the optimum inventory quantity (Yes), the process proceeds to Step S16, and if not (No), the process proceeds to Step S19.

  In step S16, since the stock forecast is less than the standard, the target order is reselected. The reselection method is, for example, in addition to the target order selected by changing the selected order in order from the earliest delivery date among the order orders not targeted in the process of selecting the target order in step S11, The processing is returned to step S13 (then, the above steps S13 to S15 are executed again, the inventory amount transition (forecast) is predicted and calculated again, and the result is displayed on the display device 64 in a graph that is visible to the operator.)

In step S17, it is determined whether or not there is a need for delivery date. If there is no need for delivery date (No), the process proceeds to step S18.
In step S18, since the forecast of the in-process inventory amount on the last day exceeds the standard with respect to the preset optimal inventory amount, the target order is reselected. Various reselection methods can be set. For example, among the order orders targeted in the process of selecting the target order in step S11, the gas removal order and the heat treatment order are selected in order from the one with the later delivery date, such as the shaded portion shown in FIG. The target order is reselected by excluding it from the target order, changing it to a non-selected order, etc., and the process is returned to step S13 (then, the above steps S13 to S15 are executed again to change the inventory amount ( (Forecast) is predicted again, and the result is displayed on the display device 64 so as to be visible to the operator. Note that the target order that has been changed to a non-selected order can be dealt with by replacing the part with a shearing (line) material that is not in stock.

  On the other hand, if there is a need for dealing with the delivery date (Yes), the process proceeds to step S19, and the selected target order is determined as a planning target as an exceptional process. Note that the confirmation process via step S17 is an exceptional process, and the selection is made while exceeding the range of the optimal inventory quantity on the premise of, for example, changing the staffing of the factory. The selected target order is determined as a plan target. The display device 64 displays that exception processing is executed and notifies the operator of that fact.

In step S19, since the forecast of the in-process inventory amount on the last day is within the range of the optimal inventory amount with respect to the preset optimal inventory amount, the selected target order is determined as a planning target, and step S20 (detailed After the process shifts to (to be described later), the production target range determination process is finished, and the production plan shifts to the next elementary measurement step (S2) shown in FIG.
Here, in step S20 in the process described above, due to each due date unit, due date optimization processing is performed to perform “climbing” so that the daily stock quantity does not exceed the reference.

Specifically, when the process proceeds to step S20 in the production target range setting process, the due date optimization process shown in FIG. 5 is executed, and as shown in the figure, the process first proceeds to step S21. In step S21, as in the above-described step S12, the range of the optimal inventory quantity for each date in the predetermined period (examination section) is set. The processing target data referred to here is “scheduled process information, scheduled date information, heat treatment temperature information, product size information, product unit weight information, delivery date information”. In the subsequent step S22, the information of the process in the above-described step S13 is read, and the due stock quantity of the selected target order corresponding to each due date is set. In the further subsequent step S23, the due date n is set to the first day ( n = 1) and the process proceeds to step S24.
In step S24, it is determined whether or not the stock quantity of the target order on the due date n is within the range of the optimum stock quantity on the due date n. Here, as the range of the optimal stock quantity on the date n, for example, about ± 10 sheets (about 2-3%) is set with respect to the standard stock quantity (number of sheets) K shown in FIG. The total number of sheets shown in FIG. 7 is a numerical value in which the thicknesses of various steel plates are mixed.

Then, if the result of the determination is within the range of the optimum stock quantity on the date n (Yes), the process proceeds to Step S25, and if not (No), the process proceeds to Step S27.
In step S25, due date n is set to the next due date (n = n + 1), and in subsequent step S26, it is determined whether due date n is the final due date. If it is the final due date, the process proceeds to step S31. The process returns to step S24.

In step S27, it is determined whether or not the inventory quantity of the target order on the due date n exceeds the range of the optimum inventory quantity on the due date n (Yes), the process proceeds to step S29. (No) The process proceeds to step S28.
In step S29, the target orders for the amount exceeding the range of the optimum stock quantity on the due date n are stored in order of the due date (associated with the due date), and the process proceeds to step S25. That is, in this step S29, a target order corresponding to the quantity exceeding the standard is selected from the order group of the day on the day when the inventory prospect is equal to or higher than the standard, and this is stored as the target order for applicability to be adjusted.

  In step S28, it is determined whether or not the inventory amount of the target order on the due date n is less than the range of the optimal inventory amount on the due date n. If not (Yes), the process proceeds to step S30. (No) The process proceeds to step S25. In step S30, the target orders for the amount not satisfying the range of the optimum stock quantity on the due date n are stored in the due date order (associated with the due date), and the process proceeds to step S25. That is, in this step S30, on the day when the inventory prospect becomes less than the reference, the unsatisfied order is stored as the target order for allocation to be adjusted.

In step S31, the target order of each due date n is determined based on the stored adjustment target order by shifting the planned due date back and forth to equalize the daily inventory quantity (examination section). Recalculation is performed throughout. In other words, in the example of the present embodiment, the target order for the portion exceeding the range of the optimal stock quantity is compared to the target order for the portion that is less than the range of the optimal stock quantity stored in the order of due dates by the above-described processing. Are applied in order of due date.
In this case, in the actual processing process, adjustment can be made by changing, for example, the scheduled rolling date in conjunction with the change of the scheduled date.

Next, the operation and effect of the production target range setting device 100 described above will be described.
As already mentioned, in the current comprehensive factory management system, the operator selects the orders to be included in the plan based on the list of delivery date, specifications, quantity, etc. in order to create the production plan, and then the computer is selected. We support and do billing, charge knitting, and steelmaking. As described above, the operator determines the selection of the target order as an important management point. Therefore, depending on the contents selected by the operator, there is a possibility that the stock amount will be accumulated more than necessary by the processing process. Also, if the target order is leaked, interrupt processing may be required.

  With respect to such a conventional problem, according to the production target range setting device 100 described above, in the process of step S11, the order received corresponding to the amount of steel output for a predetermined period from the entire order received in the order of early delivery date. Is selected as the target order (corresponding to target order selection means, target order selection step). Specifically, for example, as shown in Table 1 below and FIG. 6 (only the gas cutting material is shown), as a predetermined period, from the entire order received from December 5 to December 31, Cut and non-gas cutting (shear) are temporarily selected. This initial (provisional) selection may be made to be selected by a computer, or may be input by the operator from the input device 60 as in the conventional case.

  And in the process of step S13, with respect to the selected target order, each stock status information, each processing date information, and each processing efficiency information of a plurality of types of steel plates (Table 2 shows an example of efficiency setting in gas cutting. In-process inventory quantity for a predetermined period is predicted and calculated based on a plurality of target range determination parameters that take into account at least (shown)) (corresponding to the plan creation target range setting means and the plan creation target range setting step).

  Furthermore, in the process of step S13, the result of predicting and calculating the inventory amount transition (forecast) is displayed in a graph on the display device 64 so as to be visible to the operator as shown in FIG. 7, for example. By visualizing the prospects of the resulting inventory amount, it is possible to select an appropriate target and to operate with an appropriate inventory amount. Further, for example, in the case of “gas cutting” illustrated in FIG. 6, as shown again in FIG. 8, the portion exceeding the appropriate inventory amount is highlighted (see the hatched portion in FIG. 6). By this, it can be shown on the display device 64 so as to be visible to the operator.

  Next, in the processes of steps S14 to S19, the in-process inventory on the last day with respect to the preset optimum inventory range read in the process of step S12 and the in-process inventory quantity predicted in the process of step S13. Based on the comparison with the quantity, the selection amount of the target order is modified and the plan creation target range is set (corresponding to the plan creation target range setting means and the plan creation target range setting step). In addition to the delivery date, standard, and quantity, each processing date and each processing efficiency can be automatically calculated to estimate the inventory amount.

  In the processes of steps S14 to S19, when the in-process inventory quantity on the last day of the predetermined period corresponding to the entire target order exceeds the predetermined optimum inventory quantity range (step S14), the process is selected. A new target order is set by excluding a sales order corresponding to the amount of steel output that has exceeded the order of late delivery date from the sales order, and a new target order is set (step S18). When the predetermined optimum stock quantity range is not reached (step S15), the order corresponding to the amount of steel output that is not yet selected from the entire order received and is not satisfied from the next order with the earliest delivery date. Since a new target order is set by adding the order to the target order (step S16), a steel sheet with a quick delivery date is thus prepared. Since it is possible to wait over, it decreases to an emergency (interrupt) processing such as extraction. In addition, by adopting the production target range setting device 100 of the present embodiment, for example, the in-process amount of steel plate can be reduced by 2.1,000 tons.

  Further, according to the production target range setting apparatus 100, the process of step S20 (corresponding to the date optimum stock quantity setting means and the date optimum stock quantity setting step) is the optimum stock quantity for each date in the process of step S21. In the process of step S22, the due stock quantity of the selected target order corresponding to each due date is set (the due stock quantity). In the process of steps S23 to S31), the range of the optimal stock amount set for each due date is compared with the due stock amount corresponding to this, and the target order for each due date As shown in FIG. 9 which reprints FIG. 7, the selection amount for each due date is corrected (the due date order correcting means and the due date order correcting step). In the valley of the order, it is possible to break the mountain to fill the mountain (part of the code t1 shown in hatching in the figure) of the target order (showing an image by a symbol T in the drawing). In other words, it is possible to compare the in-process inventory amount of the target order with the reference inventory amount even on a daily basis, and move the part that exceeds the optimal inventory amount range (reference inventory amount) to the part that does not meet the reference inventory amount on a daily basis. Therefore, as shown in Table 3, leveling adjustments are made at the same time, and more efficient factory operation is possible.

As described above, according to the production target range setting device 100 and the production target range setting method using the same, a plurality of types of steel plates are conveyed to a plurality of processes in a discontinuous process, thereby When setting the production plan creation target range in the production process where inventory stays immediately before the process, it is possible to automatically select the target order to start manufacturing, which makes it possible to inventory more than what has been done by operators in the past. Optimization and processing day delays can be eliminated.
It should be noted that the production target range setting device at the time of creating a plan production plan according to the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. is there.

S1 Plan target selection step S2 Basic measurement step S3 Charge knitting step S4 Steel billing step 50 CPU
60 input device 64 display device 66 database 100 production target range setting device

Claims (4)

By transporting multiple types of steel plates to multiple processes in a non-continuous process, it is used in production processes where inventory stays immediately before the multiple processes, and the production plan for the steel plates is in accordance with orders received from customers. Production target range setting device that sets the target range when creating
For the target order selected by the target order selection means, the target order selection means for selecting the sales order corresponding to the amount of steel output for a predetermined period as the target order in the order of early delivery date from the whole of the order orders, Based on a plurality of target range determination parameters that take into account each stock status information, each processing date information, and each processing efficiency information of the plurality of types of steel plates, the in-process inventory amount in the predetermined period is predicted and calculated. Based on a comparison between the in-process inventory amount on the last day of the in-process inventory amount and the preset optimal inventory amount range for each process, the target order selection amount is corrected in order for each process in order to create a plan. A plan creation target range setting means for setting a range,
The plan creation target range setting means, in order for each of a plurality of processes,
When the in-process inventory amount on the last day of the selected target order exceeds the range of the optimal inventory amount in the process, it corresponds to the output steel amount that has exceeded the order from the target order in the late delivery date. Exclude new orders from the target order and set a new target order.
When the in-process inventory quantity on the last day of the selected target order is less than the optimum inventory quantity range in the process, it is a sales order that has not yet been selected among the sales orders and has the next earliest delivery date A production target range setting device, wherein a new target order is set by adding a sales order corresponding to the amount of steel output that is less than the target order to the target order. A date target order setting means for setting an optimal target order for each date of the predetermined period;
The due date order setting means includes due date quantity setting means for setting the due date inventory amount of the selected target order corresponding to each due date, and the range of the optimum inventory amount for each due date set in advance and corresponding to this. A due date order correcting means for correcting the selected amount of the target order for each due date,
The due date order correcting means, when the due stock amount corresponding to each due date exceeds the range of the optimum inventory amount, the range of the optimum inventory amount in order from the selected target order in the order of the due date. 2. The production according to claim 1, wherein a new target order is set by allocating the target orders in excess of the target order having a due stock amount that is less than 1 to advance the due date. Target range setting device. By transporting multiple types of steel sheets to multiple processes in a non-continuous process, it is used in production processes where inventory stays immediately before the multiple processes. This is a method of setting the target range when creating according to a sales order from
A target order selection step in which a sales order corresponding to a steel output amount for a predetermined period is selected as a target order in the order from the earliest delivery date among the entire sales order, and a target order is selected in the target order selection step. Predicting the in-process inventory amount in the predetermined period based on a plurality of target range determination parameters that take into account at least the inventory status information, the processing date information, and the processing efficiency information of the plurality of types of steel sheets for the order Then, based on a comparison between the in-process inventory amount on the last day of the predicted in-process inventory amount and the preset optimal inventory amount range for each process, the selection amount of the target order is corrected in order for each process. And a plan creation target range setting step for setting a plan creation target range,
In the plan creation target range setting step, in order for each of a plurality of processes,
When the in-process inventory amount on the last day of the selected target order exceeds the range of the optimal inventory amount in the process, it corresponds to the output steel amount that has exceeded the order from the target order in the late delivery date. Exclude new orders from the target order and set a new target order.
When the in-process inventory quantity on the last day of the selected target order is less than the optimum inventory quantity range in the process, it is a sales order that has not yet been selected among the sales orders and has the next earliest delivery date A production target range setting method characterized in that a new target order is set by adding a sales order corresponding to the amount of steel output not satisfying from the sales order to the target order. A deadline target order setting step of setting an optimal target order for each due date of the predetermined period by calculation processing by a computer;
The due date order setting step compares the due date optimum stock setting step for setting the optimum stock amount for each due date with the pre-set optimum stock amount range for each due date and the due stock amount corresponding thereto. A due date order correcting step for correcting the selection amount of the target order for each due date,
In the due date order correction step, when the due stock amount corresponding to each due date exceeds the range of the optimum stock amount, the range of the optimum stock amount in order from the selected target order in the order of the due date. 4. The production according to claim 3, wherein a new target order is set by allocating the target orders in excess of the target order having a due stock amount less than 1 to the advance date. Target range setting method.

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