JP2009087196A - Method, device, and program for creating facility load plan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take advantage of facility capacity at maximum. <P>SOLUTION: The facility load plan creation device comprises an operation date and time determination part for determining an operation date and time based on a delivery date and a predetermined standard lead time on each order of various products, a load stacking part for stacking loads based on the operation date and time, a load excess determination part 3 for determining whether the loads stacked in each facility exceeds processing capacities of the respective facilities, a backward load unstacking part 5 for unstacking the load exceeding the processing capacity in a direction opposite to a time flow, a part 6 for determining restriction sufficiency on a start availability date for deciding whether the load unstacked by the backward load unstacking part 5 are stacked before the earliest manufacture start date, and a forward load unstacking part 7 for unstacking the load in a forward direction to the time flow when it is determined that the load unstacked by the backward load unstacking part 5 before the earliest manufacture start date are stacked. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, for example, when producing multiple types of products in a production line consisting of multiple processes (or multiple facilities), such as a production line of a material factory such as a copper plate, the production has already been started upon receipt of an order. Considering the work-in-process in progress and the expected orders for a few months ahead, the equipment load that indicates how much is processed per unit period in each process (or each equipment) within the predetermined plan period The present invention relates to a method, an apparatus, and a program for creating a plan.

  The above equipment load plan is to calculate the processing amount (load) required for production in each process (or each equipment) according to the order quantity for each order, and the capacity in each process (or each equipment) In other words, a so-called loading plan (plan for processing an order in each process (or facility)) is shown. In the following, unless otherwise specified, the term “process” also means equipment.

  In determining the equipment load plan, backward load pile calculation and load collapse calculation are used. The former backward load pile calculation calculates the amount of load per unit period in the process that needs to be processed in each order, and does not consider the capability of each process, so that it can be delivered from the lower process in time for delivery. This is a calculation that loads in order and for each unit period. On the other hand, the latter load collapse calculation is performed when the load per unit period exceeds the equipment capacity as a result of the load accumulation calculation, and is the earliest possible date that can be processed in the process. The backward load calculation that relaxes the start date constraint that must be processed afterwards and breaks the load in the opposite direction of the time flow, and the time flow and order in consideration of the start date constraint. Including forward load crush calculation that breaks the load in the direction.

  In the equipment load plan, when the production line is composed of a plurality of processes and the load of a certain order is adjusted in a certain process, it is highly possible that the influence will affect other processes. Therefore, by breaking the load in one process, it is necessary to break the load of other facilities, and there is a possibility that a delay in delivery date may occur because the facility capacity cannot be utilized to the maximum extent. In addition, if the original order quantity and the delivery date for it exceed the capacity of the entire factory, it is necessary to appropriately determine which order is delayed, or to appropriately determine the target and quantity of delivery date adjustment. is there. In addition, there are many cases where planned repairs of equipment are scheduled at the factory, and when the equipment load plan is made considering only the delivery date, the repair plan date and the processing date overlap, so the actual processing is not possible. In such a case, it is necessary not to defer the load, but to prevent the delay in delivery by performing the preceding production.

  For example, an equipment load plan in an industry represented by material products calculates the load in each process according to the quantity and type of an order, and the unit period (loading each order) within the capacity of the equipment. Unit period to be processed by the equipment of the equipment) so that the order is in time for delivery.

  As described above, when the production line is composed of a plurality of processes, when the load of a certain order is adjusted in a certain process, there is a high possibility that the influence will affect other processes. In the process, equipment capacity cannot be utilized to the maximum, and there may be a delay in delivery. In addition, in order to meet the delivery date, there is a possibility that pre-production will be performed more than necessary and the in-process inventory will increase.

  Therefore, the range of load adjustment is the difference between the latest production start date that can be in time for delivery even if processing is started the latest, and the planned production date obtained once load accumulation is performed, and no delay in delivery date is allowed. And the method of adjusting load so that prior production can be reduced as much as possible is proposed (for example, refer to patent documents 1).

  This proposed method has the following features.

  (1) For example, using the standard lead time based on the actual work time at the actual factory, the earliest manufacturable date in each process is calculated from the order date (today) for each order, and load piles are added according to that value. To calculate the planned date of manufacture.

  (2) Using the standard lead time, calculate the latest production possible date in each process from the delivery date for each order.

  (3) The load is adjusted for each process in order from the upper process within the load stackable range calculated from (1) and (2) above. In this case, when it is possible to load all the loads so that they are within the capacity range within the load stackable range, it is possible to create a load plan that does not cause a delay in delivery for all orders (that is, the upper process) By updating the earliest manufacturable date of the lower process from the result of the load adjustment of the process, the prior relationship restriction of the process is observed). Furthermore, in this adjustment, it is considered to delay the load accumulation date as much as possible in order to reduce the in-process inventory by considering the difference between the load accumulation date and the latest manufacturable date.

  (4) In the above (3), when the load cannot be adjusted in each step, the production constraint condition is changed or the planned shutdown date of the equipment is changed. This makes it possible to create a load plan that satisfies the delivery date of all orders.

  (5) The above (3) and (4) are performed in all steps.

According to the above method, it is possible to formulate a load plan that reduces the in-process inventory as much as possible while satisfying the delivery date. This makes it possible to respond flexibly to changes in delivery times and environmental changes in the factory.
JP-A-2005-216074

  However, in the case of the proposed method, there are the following problems. In other words, if a delay in delivery date is unavoidable for part or all of an order, there is a possibility that it can be handled only by adjusting the delivery date or adjusting the preconditions such as a change in equipment capacity. Since the adjustment is performed, the lower process is determined by the convenience of the upper process, and there is a problem that the equipment capacity cannot be utilized to the maximum.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide an equipment load plan creation method, apparatus, and program that can make the most of equipment capacity.

  The equipment load plan creation device of the present invention according to claim 1 is an equipment load plan creation device for creating an equipment load plan for producing various types of products through a plurality of manufacturing processes. Based on the standard lead time, the work date and time determining means for determining the work date and time in each manufacturing process based on the delivery date and the equipment corresponding to each manufacturing process based on the determined work date and time Load stacking means for virtually stacking the load for manufacturing according to the load, and load for determining whether or not the amount of load virtually loaded on each facility by the load stacking means exceeds the processing capacity of the facility In order to keep the load accumulated in the equipment determined to exceed the processing capacity by the excess determination means and the overload determination means within the processing capacity, each order is moved to the date and time opposite to the flow of time. Virtual A backward load devastating means for performing undue collapse, a determination means for determining whether the date and time after the movement of the load moved by the backward load devastating means is earlier than the earliest manufacturing start date, and When the judgment by the judgment means is affirmative, the forward load devastating means for performing a virtual landslide that moves the load loaded before the earliest manufacturing start date to the time flow and the forward date and time. It is characterized by including.

  The equipment load plan creation device of the present invention according to claim 2 further comprises priority order setting means for setting a priority order with respect to an order of a load subject to load collapse by the backward load collapse means. And

  The equipment load plan creation device of the present invention according to claim 3 is provided with priority order setting means for setting a priority order with respect to an order of a load to be subject to load collapse by the forward load collapse means. To do.

  The equipment load plan creation device of the present invention according to claim 4 is characterized in that, when there is an alternative equipment, the backward load devastating means performs landslide including the alternative equipment at the destination of the crushed load. And

  The equipment load plan creation device of the present invention according to claim 5 is characterized in that the forward load crushing means crushes the excess load exceeding the processing capacity of the equipment.

  The equipment load plan creation device of the present invention according to claim 6 is characterized in that, when there is an alternative equipment, the forward load devastating means performs landslide including the alternative equipment at the destination of the crushed load. To do.

  The equipment load plan creation device of the present invention according to claim 7 is characterized in that, when there are a plurality of loads exceeding the processing capacity of the equipment, the forward load crushing means crushes a load with a late delivery date. To do.

  The facility load plan creation method of the present invention according to claim 8 is the facility load plan creation method for creating an facility load plan in the case of producing a variety of products through a plurality of manufacturing processes. Based on the standard lead time, the work date and time determination process for determining the work date and time in each manufacturing process based on the delivery date, and the equipment corresponding to each manufacturing process based on the determined work date and time, A load stacking process for virtually stacking loads for manufacturing according to the load, and a load for determining whether or not the amount of load virtually loaded on each facility in the load stacking process exceeds the processing capacity of the facility In order to keep the load accumulated in the equipment determined to exceed the processing capacity in the excess determination process and the overload determination process within the processing capacity, each order is moved to a date and time opposite to the flow of time. , Virtual landslide A backward load crushing step, a judgment step for judging whether or not the date and time after the movement of the load moved in the backward load crushing step is earlier than the earliest manufacturing start date, and the judgment step If the determination is affirmative, the load loaded prior to the earliest manufacturing start date is moved to the flow of time and the date and time in the forward direction, a forward load crushing step for performing a virtual crushing is performed. It is characterized by including.

  An equipment load plan creation program according to the present invention according to claim 9 is a program for creating an equipment load plan for producing a variety of products through a plurality of manufacturing processes using a computer. Based on the delivery date and a predetermined standard lead time every time, the work date determination function for determining the work date and time in each manufacturing process based on the delivery date, and corresponding to each manufacturing process based on the determined work date and time Load stacking function for virtually stacking the load for manufacturing according to the order quantity on the equipment, and whether the amount of load virtually loaded on each equipment by the load stacking function exceeds the processing capacity of the equipment A load overload determination function for determining whether or not the load is piled up in the equipment that has been determined to exceed the processing capacity by the overload determination function. The backward load load-climbing function that performs virtual mountain-climbing and the date and time after the movement of the load moved by the backward load-climbing function are moved earlier than the start date of manufacturing. A determination function for determining whether or not, and when the determination by the determination function is affirmative, the load loaded before the earliest manufacturing start date is moved to a flow of time and a forward date and time. This is to execute a forward load landslide function for performing a landslide.

  In the case of the equipment load plan creation method, apparatus and program according to the present invention, when the load piled up in each manufacturing process exceeds the processing capacity of the equipment, the load load break is once carried out in the backward direction, and thereafter By performing forward load crushing, it is possible to plan to make the most of the processing capacity of the facility during the planning period. At this time, the processing capacity of the facility can be utilized to the maximum by adopting a configuration that satisfies claim 5.

  In the case of the invention according to claim 2, backward load crushing can be executed in order from the order of higher priority, which makes it possible to easily cope with orders with strict delivery times. Become. Further, in the case of the invention according to claim 3, forward load crushing can be executed in order from the order of higher priority, so that it is possible to easily cope with orders with strict delivery times. It becomes.

  In the case of the invention according to claim 4, it is possible to relax the restriction on the start date of manufacturing when performing backward load collapse, and it is possible to cope with a situation in which a delay in delivery date is inevitably generated.

  In the case of the invention according to claim 6, it is possible to satisfy the restrictions on the start date of the production when performing forward load crushing. In addition, since load collapse is performed along the time axis, it is difficult for differences in delivery delays to occur in orders with delivery dates at the same time, and even when delivery delays occur, leveling of delivery delays is achieved. .

  According to claim 7, when there are multiple loads that exceed the processing capacity of the equipment, the load with late delivery is crushed in the forward direction with the flow of time, so the delivery delay amount for all orders can be leveled become.

  The present invention will be specifically described below.

  FIG. 1 is a block diagram showing the configuration of the equipment load plan creation device according to this embodiment.

  The equipment load plan creation device 1 includes a backward load stacking unit 2, an overload determination unit 3, a load collapse priority determination unit 4, a backward load collapse unit 5, a startable day constraint satisfaction determination unit 6, and a forward load. A mountain breaker 7 and a data storage unit 8 are provided. In the present embodiment, the above-described backward load stacking unit 2, the overload determination unit 3, the load collapse priority determination unit 4, the backward load collapse unit 5, the startable day constraint satisfaction determination unit 6, and the forward load Information exchange with the mountain breaker 7 is performed using a communication network.

  The data storage unit 8 is composed of a RAM and a ROM, and the RAM area includes facility (processing process) information shown in Table 1 and value information related to processing capacity corresponding thereto, process information shown in Table 2, and orders shown in Table 3. Information, standard lead time based on actual work time in actual equipment, etc. are stored, and the ROM area stores programs for creating equipment load plans and various data necessary for executing the programs. .

  As the process information, in the present embodiment, it is assumed that the received target products are 11 types of order A to order K, and a production line that processes products in the order of process 1 → process 2 → process 3 → process 4 is assumed. ing. Further, the order information includes the delivery date of order A to order K and the number of orders. In addition, the standard lead time is set to 1 day for all orders and between all processes, does not take into account the yield loss that occurs when passing through each process, which usually occurs in factories for raw materials, and produces products. At this time, conditions such as observance of the order of the facilities shown in Table 2 are set. Furthermore, the standard lead time may be based on a target time or the like instead of the actual work time. Furthermore, it is not always necessary to store the program for creating the equipment load plan and various data necessary for executing the program in the ROM area. In the mode in which the programs are written from the external memory, the ROM is replaced with the ROM. The storage unit may be configured by a RAM.

  The backward load stacking unit 2 inputs various data from the data storage unit 8 and virtually stacks the load for manufacturing according to the order quantity for all orders without considering the equipment capacity based on the delivery date. As shown in FIG. 2, it has a backward work date and time determination unit 11 and a backward load addition unit 12 to which the various data are input. The date and time is determined, and the load is added virtually to the corresponding equipment based on the work date and time by the backward load adding unit 12.

  As a result of the load stacking by the backward load stacking unit 2, the overload determination unit 3 determines that the amount of load loaded in the facility at any date and time corresponds to the facility processing capability, that is, the added facility processing capability. Determine whether it has exceeded.

  The backward load crushing unit 5 performs a virtual load crushing to move the load in the direction opposite to the flow of time when it is determined by the overload determination unit 3 that the load is exceeded. The selection of the order for performing the load collapse is performed according to the priority determined by the load collapse priority determination unit 4.

  As shown in FIG. 3, the specific configuration of the backward load devastating unit 5 includes an overload determination / load devastating target equipment determination unit 21, a backward load devastating target determination unit 22, and a backward load devastating unit. 23 and a precedence relation constraint satisfaction unit 24, and the priority for load collapse is input to the backward load collapse target determination unit 22.

  The load overload judgment / load load collapse target equipment determination unit 21 goes back the time from the latest loaded day (in the opposite direction to the flow of time), and the load exceeds the processing capacity. Judge whether there is. When an overload occurs at a certain date and time at a certain facility, the backward load collapse target determination unit 22 determines an order to collapse the load according to the priority calculated by the load collapse priority determination unit 4. Then, the backward load crushing unit 23 moves (crashes) the load of the target order before the date and time when it was originally loaded. Here, in the process of going back in time, it is allowed to load more in the past than the day when it can start (today). The precedence relationship constraint satisfaction unit 24 satisfies the precedence relationship constraint of the processing order of products when the backward load crushed unit 23 affects other facilities by breaking the load.

  When the start date constraint fulfillment determination unit 6 inputs the result of the backward load collapse by the backward load collapse unit 5, is the load of any order placed before the start date (today)? Determine whether or not.

  The forward load crushing unit 7 moves the load in the forward direction with the flow of time when the start date constraint satisfaction determination unit 6 determines that the load is loaded before the start date (today). The equipment load plan is determined by performing a virtual landslide, and the selection of the order for performing the load erosion is performed according to the priority determined by the load landslide priority determination unit 4. Note that the priority at this time may be a priority used at the time of backward load collapse, or another priority may be used.

  As shown in FIG. 4, the specific configuration of the forward load landscaping unit 7 includes a startable day constraint resolution unit 31, an overload determination / load landslide target equipment determination unit 32, and a forward load landslide target determination unit 33. A forward load crushing portion 34 and a preceding relationship constraint satisfaction portion 35 are provided.

  The possible start date constraint resolution unit 31 moves (breaks) the load accumulated before the possible start date (today) to the future while satisfying the order processing prior constraints, and reduces the load before the possible start date. Everything is going into the future. The overload determination / load collapse target equipment determination unit 32 does not exceed the processing capacity in each equipment in the form of time advance (in the forward direction of time) from the earliest day when the load is loaded. Determine whether. When an overload occurs at a certain date and time at a certain facility, the forward load collapse target determination unit 33 determines an order to destroy the load according to the priority calculated by the load collapse priority determination device 4. The forward load crushing unit 34 crushes the load of the target order before the date and time when it was originally loaded. The precedence relation constraint satisfaction unit 35 is configured to satisfy the precedence relationship constraint of the processing order of products when the load is broken by the forward load crushing unit 34 to affect other equipment of the same order.

  The processing flow of the equipment load plan planning by the equipment load plan creation device of the present embodiment configured as described above will be described based on the flowchart of FIG.

  First, the amount of load required in each process is determined by the backward load stacking unit 2 according to the quantity and type of the target order. Then, the delivery date of the order is set as the load accumulation date of the final process of the order, and the work date and time for each order and equipment unit is determined using the standard lead time in order from the final process to the upper process (step S1). ), Backward load pile calculation is performed (step S2). Regarding the backward load pile calculation, the load of each order is added to the corresponding equipment at the latest timing in time for delivery without considering the equipment processing capacity (virtual load pile is performed). Here, as the standard lead time, for example, one of the time calculated from the actual work performance of the factory or the shortest time is selected and used.

  FIG. 6 shows the result of backward load pile calculation. In addition, the broken line in FIGS. 6-10 shows an equipment processing capability.

  In order A, the facility 4 has been started at the start of planning (one day). Since the delivery date is one day, the load pile date and time in the equipment 4 of order A is one day. In addition, since the processing up to the facility 3 has been completed for the order A, the processing for determining the load pile date and time for the order A is completed.

  Moreover, in order H, since it has not started at the time of a plan start, it is necessary to add (load) the load from the equipment 1 to the equipment 4. Since the delivery date of the order H is 10 days, the load accumulation date and time of the equipment 4 which is the final process of the order H is 10 days. Based on this information, load is loaded retroactively. Specifically, according to the standard lead time, the work date and time is determined for all processes, such as process 3 for 9 days, process 2 for 8 days, and process 1 for 7 days.

  Such calculation is repeatedly performed for all orders, the work date and time of each process of all orders is determined, and a load (order quantity) is added (stacked) to the determined work date and time. Here, when loading the load, for example, at the place where the delivery dates of orders H, I, J, K are concentrated as in 10 days, the load that has been loaded often exceeds the facility processing capacity, Since this is resolved in the next step and beyond, it is not considered in this step.

  Next, the overload determination unit 3 determines whether or not the loads accumulated on all the processes and all the days are within the range of the facility processing capacity (step S3). Then, when the load exceeds the facility processing capacity in all processes and on all days, the result of FIG. 6 is used as the result of the final load collapse calculation, and the load collapse calculation is not performed ( Step S4).

  On the other hand, if the load exceeds the facility capacity as a result of the load pile in step S3, step 5 is executed. In the result of the load pile calculation in FIG. 6, since there are facilities and dates and times when the load exceeds the capacity for 2 to 4 days and 6 to 10 days, Step 5 is executed. That is, from the last 10 days of the planning period, as shown in FIG. 7 (a diagram showing a state in the middle of the backward load collapse calculation) by the backward load collapse unit 5 and the load collapse priority determination unit 4. As shown by the white arrow, the equipment whose load exceeds the processing capacity is selected while proceeding in the direction opposite to the flow of time, and the load is destroyed. More specifically, first, it is confirmed whether there is a facility that is loaded beyond the facility capacity at the latest date and time when the load is loaded (in this example, 10 days). If not, proceed one day and continue with the same process. Here, in step 4 on the 10th, a load is loaded exceeding the facility processing capacity. Therefore, the load loaded on the 10th is moved (disintegrated) on the 9th until the load falls within the range of the facility processing capacity. Here, since the delivery times of orders H, I, J, and K are the same, the order numbers are selected in ascending order. Therefore, the loads of orders H, I, and J are destroyed on the 9th (indicated by shading). From this result, in order to satisfy the prior relationship of processing in each order, the loads of Steps 3 to 1 in the orders H, I, and J are also destroyed in order.

  In addition, since there is no other process in which the load exceeds the facility capacity on the 10th, the day is advanced by one day. By repeating this process, the result as shown in FIG. 8 (a diagram showing the results of backward load collapse calculation) is finally obtained.

  Next, the start date constraint satisfaction determination unit 6 determines whether or not a load is loaded before the start date in all processes as a result of the backward load collapse calculation (step S6). If no load is loaded before the start date in all the steps, the result shown in FIG. 8 is used as the final load collapse calculation result (step S7), and the process ends. In this embodiment, since the load of the order D in the process 1 and the load of the order A in the process 4 are stacked before the start date, the process proceeds to the next step S8, and the forward load collapse calculation is performed. In this embodiment, for convenience, the start date is set to 1 day for all orders, but this date may be variably set for each product. In the present embodiment, the delivery date is selected in the same manner as in the case of backward load collapse calculation based on the criteria for breaking the load that is loaded on the same day. Of course, another index may be used.

  In step S8, first, it is confirmed whether or not an order load is not loaded in each process before the start date. In the present embodiment, such loads are loaded in the steps 1 and 4 (see FIG. 8). Then, all of such loads are moved (disintegrated) after the start date as shown in FIG. 9 (a diagram showing a state during forward load crush calculation). In this case, the order of the steps for breaking the load does not affect the result even if the load is broken from any step. Here, as in the case of backward load collapse, when the prior relationship constraint of processing is disrupted by disrupting the load, the constraint is satisfied by adjusting the load of other processes.

  After destroying all the loads loaded before such a possible start date, it is checked whether the load exceeds the facility capacity in each process. If it exceeds, move the excess load to the future (next day) based on the delivery date described earlier. If the overload is resolved in all the processes, the same process is performed by advancing one day.

  Next, load crushing after the start date is performed as follows. That is, it is confirmed whether or not the load load amount exceeds the facility processing capacity at the earliest date and time when the load is loaded (in this example, one day). In this example, the load exceeds the capacity in step 4. The loads loaded in the process 4 are the order A and the order C. Here, since the delivery date of order A and order C is later in order C, the load of order C is moved to the future (2 days) as shown in FIG. 10 (a diagram showing the result of forward load crushing calculation). (Break). Since the process 4 is the final process in the order C, it is not necessary to consider the influence on the other processes of the order C. Here, if overload is resolved in all processes in one day, the date and time are advanced (proceed to two days). This is repeated until the load accumulated in all processes in the entire planning period does not exceed the facility processing capacity (step S8). In addition, when an overload exists in a plurality of processes at the same date and time, the load is crushed from a process with a large excess amount.

  Then, as shown in FIG. 10, when the final load collapse calculation result in which the load load does not exceed the capacity is obtained (step S9), the process ends. Steps S8 and S9 are performed by the forward load crushing unit 7 and the load crushing priority determination unit 4.

  Therefore, in the case of this embodiment, as shown by the shaded area in FIG. 10, although there is a delay in the delivery date for orders C, G, K, process 4 is planned to make the best use of the facility capacity. Standing up. Therefore, in order to eliminate the delay in delivery date, the delivery date is adjusted. Alternatively, it is conceivable to adopt a method such as increasing the capability of step 4. If orders C, G, and K are processed in advance, delivery delays occur in other orders instead, but each delivery delay day is equal to 1 day and the level of delivery delay is also equalized. Furthermore, in the present embodiment, backward load crushing is executed in order from the order of higher priority, which makes it possible to easily cope with orders with strict delivery dates. In addition, since the forward load crushing is executed in order from the order of higher priority, it becomes possible to easily deal with orders with strict delivery dates.

  It should be noted that the backward load load destination is basically the past (previous production is performed) from the corresponding time point, and if one or more alternative facilities exist in the target facility, the alternative facility may be a candidate. . As a result, when backward load crushing is performed, restrictions on the earliest manufacturing start date can be alleviated, and it is possible to cope with situations in which delays in delivery are unavoidable. When an alternative facility is also a candidate, the load is allowed to be loaded before the available start date calculated from the order reception date (today). At this time, the facility capacity before the start date includes provisionally setting a convenient value (for example, an average value).

  In addition, the forward load landslide destination is basically the future (processing can be deferred) from the corresponding point in time, and if there is an alternative facility in the target facility, the alternative facility may be a candidate. This makes it possible to satisfy the restrictions on the earliest manufacturing start date when performing forward load crushing. Furthermore, load balance is performed along the time axis, so it is unlikely that there will be a difference in the delivery delay amount for orders that have a delivery date at the same time. Can do. When the alternative equipment is also a candidate, it is possible to satisfy the start date restriction by deferring all the loads accumulated before the start date.

FIG. 1 is a block diagram showing the configuration of the equipment load plan creation device according to this embodiment. It is a block diagram which shows the structure of a backward load pile part. It is a block diagram which shows the structure of a backward load mountain climbing part. It is a block diagram which shows the structure of a forward load landslide part. It is a flowchart which shows the processing flow of the equipment load plan planning by the equipment load plan preparation apparatus of this embodiment. It is a figure which shows the result of load pile calculation. It is a figure which shows the state in the middle of the backward load erosion calculation. It is a figure which shows the result of a backward load erosion calculation. It is a figure which shows the state in the middle of the forward load landslide calculation. It is a figure which shows the result of a forward load landslide calculation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Equipment load plan preparation apparatus 2 Backward load pile part 3 Overload judgment part 4 Load breakage priority determination part 5 Backward load pile break part 6 Startable day restriction satisfaction judgment part 7 Forward load pile break part 8 Data storage part 11 Backward work date and time determination unit 12 Backward load addition unit

Claims (9)

In the equipment load plan creation device that creates the equipment load plan when producing various types of products through multiple manufacturing processes,
Work date determination means for determining the work date and time in each manufacturing process based on the delivery date based on the delivery date and a predetermined standard lead time for each order;
Load stacking means for virtually stacking load for manufacturing according to the order quantity on the equipment corresponding to each manufacturing process based on the determined work date and time,
Overload determination means for determining whether the amount of load virtually stacked on each facility by the load pile means exceeds the processing capacity of the facility;
A virtual landslide that moves each order to the date and time opposite to the flow of time so that the load piled up in the equipment determined to exceed the processing capacity by the overload determination means is within the processing capacity. A backward load-climbing means for performing
Judgment means for judging whether the date and time after the movement of the load moved by the backward load crushing means is earlier than the earliest production start date;
When the judgment by the judgment means is affirmative, a forward load landslide is performed to perform a virtual landslide that moves the load loaded before the earliest manufacturing start date to a time flow and a forward date and time. Means for creating an equipment load plan.   The equipment load plan creation device according to claim 1, further comprising priority order setting means for setting a priority order with respect to an order of a load to be subjected to load collapse by the backward load collapse means.   The equipment load plan creation device according to claim 1 or 2, further comprising priority order setting means for setting a priority order with respect to an order of a load that is a target of load collapse by the forward load devastating means.   The equipment load according to any one of claims 1 to 3, wherein, when there is an alternative facility, the backward load devastating means performs landslide including the alternative equipment at the destination of the crushed load. Planning device.   5. The equipment load plan creation device according to claim 1, wherein the forward load devastating means devises an excess load exceeding the processing capacity of the equipment.   6. The equipment load plan according to claim 1, wherein, when there is an alternative facility, the forward load devastating unit performs hill-climbing including the alternative equipment at a destination of the load crushed. 6. Creation device.   The equipment load plan according to any one of claims 1 to 6, wherein the forward load crushing means crushes a load with a late delivery date when there are a plurality of loads exceeding the processing capacity of the equipment. Creation device. In the equipment load plan creation method for creating the equipment load plan when producing various types of products through multiple manufacturing processes,
A work date and time determination step for determining a work date and time in each manufacturing process based on the delivery date based on a delivery date and a predetermined standard lead time for each order;
A load stacking process for virtually stacking a load for manufacturing according to the order quantity on equipment corresponding to each manufacturing process based on the determined work date and time,
An overload determination step of determining whether or not the amount of load virtually loaded on each facility in the load pile step exceeds the processing capacity of the facility;
A virtual landslide that moves each order to the date and time opposite to the flow of time so that the load loaded in the equipment that has been determined to exceed the processing capacity in the overload determination step is within the processing capacity. A backward load crushing process,
A determination step of determining whether the date and time after the movement of the load moved in the backward load crushing step is earlier than the earliest manufacturing start date;
When the determination in the determination step is affirmative, a forward load landslide that performs a virtual landslide that moves the load loaded before the earliest manufacturing start date to a time flow and a forward date and time. A facility load plan creation method comprising: A program that uses a computer to create a facility load plan for producing a variety of products through multiple manufacturing processes.
A work date and time determination function for determining a work date and time in each manufacturing process based on the delivery date based on a delivery date and a predetermined standard lead time for each order;
A load stacking function for virtually stacking a load for manufacturing according to the order quantity on the equipment corresponding to each manufacturing process based on the determined work date and time,
An overload determination function for determining whether the amount of load virtually loaded on each facility by the load pile function exceeds the processing capacity of the facility; and
A virtual landslide that moves each order to the date and time opposite to the flow of time so that the load piled up in the equipment determined to exceed the processing capacity by the overload determination function is within the processing capacity. A backward load-climbing function
A determination function for determining whether or not the date and time after the movement of the load moved by the backward load crushing function is earlier than the earliest manufacturing start date;
When the judgment by the judgment function is affirmative, the forward load landslide is performed to perform a virtual landslide that moves the load loaded before the earliest manufacturing start date to the time flow and the forward date and time. Equipment load plan creation program to execute functions.

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