JP2011227605A - Schedule preparation method, schedule preparation program, and schedule preparation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a production plan for orders and a replenishment plan of intermediate products so as to perform the production while minimizing orders causing delivery delay and maintaining appropriate in-process inventory.SOLUTION: Fundamental information about period information, order information, manufacturing route information, equipment information and process-throughput information is registered in advance (S1). Allocation points are determined based on the manufacturing route information (S2), and the information about the intermediate products being the determined allocation points is registered (S3), order amount of the order is allocated for the intermediate products or materials based on the information about the intermediate products being the allocation points (S4), and next, replenishment amount of the intermediate products is allocated for the intermediate products or the materials (S5). The production plan for the order and the replenishment plan of the intermediate products are prepared based on the result obtained by allocating the order amount of the order for the intermediate products or the materials, and also, based on the result obtained by allocating the replenishment amount of the intermediate products for the intermediate products or the materials (S6).

Description

  The present invention relates to a schedule creation method, a schedule creation program, and a schedule creation apparatus for creating a production plan for orders and a replenishment plan for intermediate products for a production line that manufactures products in a plurality of processes.

  Conventionally, in the production line of a material-based factory, the order-type production that designs after receiving an order and produces from the raw material has been the mainstream. However, in recent years, intermediate products have versatility, and multiple types of products can be produced from one intermediate product. Therefore, intermediate products are produced in advance and assigned to appropriate intermediate products according to orders. Production methods are being developed. In such a production system, which intermediate product is assigned to which order, in order to achieve the delivery date of the order and to maintain an appropriate work-in-process amount within the preset capacity range of the equipment, which intermediate product It is required to determine the production plan in consideration of how much of the product is replenished.

For example, as shown in Patent Document 1, in an production line of a semiconductor manufacturing factory, in order to shorten the period from receiving an order to shipping, an ingot that is an intermediate product is preliminarily produced in advance, and an order is assigned to the intermediate product. A scheme has been proposed. In Patent Document 1, a production plan is prepared in which a delay in delivery date is prevented by assigning to an intermediate product. This production system has the following characteristics.
1) At the stage of an intermediate product for which processing up to a specific process has been completed based on order information from a customer, provision is made by associating the order information with the intermediate product.
2) The allocated intermediate product is inspected to determine whether the standard required by the customer is satisfied.
3) For the intermediate products that have been allocated, a production plan is created by allocating the work process load in the forward direction of the production process from the day of allocation or the latest process performance date.

JP 2004-118472 A

  However, in the production method as shown in Patent Document 1, since only the intermediate products that have been processed up to a specific process are allocated, orders that are likely to be delayed are processed in more processes. There is a problem that it is not possible to take a flexible measure such as not delaying the delivery date by allocating the intermediate products. In addition, there is a problem in that an intermediate product production plan is not prepared until the processing up to a specific process is completed, and the amount of the intermediate product to be allocated cannot be adjusted.

  Therefore, the problem to be solved by the present invention is to provide a schedule creation method, a schedule creation program, and a schedule creation device capable of reducing orders that are delayed in delivery as much as possible and performing production while maintaining an appropriate amount of work in progress. To do.

  A schedule creation method according to the present invention is a schedule creation method for creating a production plan for orders and a replenishment plan for intermediate products for a production line that manufactures products in a plurality of processes, and is executed by a computing unit of a computer. Order information storage step for registering the product, order quantity, and delivery date of the order, and manufacturing route information storage step for registering a manufacturing route that is a series of a plurality of processes for manufacturing a product for each product; A facility information storage step for registering equipment that can be used in the process, an allocation point determination step for determining an allocation point, which is a process for manufacturing an intermediate product that allocates the order based on the manufacturing route, The order can be allocated for each order, the order quantity of the order that is the allocation target, the order that is the allocation target can be allocated An order allocation step of allocating to raw materials if there is no inventory amount of the intermediate product that can be allocated to the inter-product as the upper limit of the inventory amount at the start of schedule creation and the order to be allocated can be allocated; As the allocation target for each intermediate product, the replenishment amount of the intermediate product that is the allocation target is added to the intermediate product that can allocate the intermediate product that is the allocation target. If there is no remaining inventory of the intermediate product that can be allocated to the intermediate product to be allocated, the intermediate product allocation step of allocating to the raw material, and the order quantity of the order Based on the result of the allocated intermediate product or raw material, the load of each process of the manufacturing route for manufacturing the order from the intermediate product or raw material can be used in the equipment that can be used. The production process is created by allocating in order from the start of schedule creation, and the intermediate product is manufactured from the intermediate product or raw material based on the result of the intermediate product or raw material in which the replenishment amount of the intermediate product is allocated. And a schedule creation step of creating a replenishment plan by assigning the load of each process of the manufacturing route to the equipment that can be used in order from the start of schedule creation.

  A schedule creation program according to the present invention is a schedule creation program for creating a production plan for an order and a replenishment plan for an intermediate product for a production line that manufactures products in a plurality of processes. And an order information storing step for registering a delivery date, a manufacturing route information storing step for registering a manufacturing route which is a series of a plurality of processes for manufacturing a product for each product, and an equipment for registering equipment usable in the process. An information storage step, an allocation point determination step for determining an allocation point, which is a process of manufacturing an intermediate product for which the order is allocated based on the manufacturing route, and an allocation target as an allocation target for each order The order quantity of the order, which is the allocation target, is scheduled for the intermediate product that can allocate the order that is the allocation target. If there is no inventory amount of the intermediate product that can be allocated with the stock amount at the start as the upper limit and the order to be allocated, the order allocation step of allocating to the raw material, and the allocation for each intermediate product The replenishment amount of the intermediate product that is the allocation target is allocated to the intermediate product that can be allocated the intermediate product that is the allocation target up to the remaining inventory amount after allocation. An intermediate product allocating step of allocating to the raw material if there is no remaining inventory of the intermediate product capable of allocating the intermediate product to be allocated; and the intermediate product allocating the order quantity of the order Alternatively, based on the raw material results, the load of each process of the manufacturing route for manufacturing the order from the intermediate product or raw material can be used for the equipment that can be used from the start of schedule creation. Each of the production routes for producing the intermediate product from the intermediate product or the raw material based on the result of the intermediate product or the raw material which has allocated the replenishment amount of the intermediate product A schedule creation step of creating a replenishment plan by sequentially assigning the load of the process to the equipment that can be used from the start of schedule creation, and reading out by the calculation unit in the computer to execute the processing of each step Features.

  A schedule creation device according to the present invention is a schedule creation device for creating a production plan for orders and a replenishment plan for intermediate products using a calculation unit of a computer for a production line for manufacturing products in a plurality of processes. An order information storage unit for registering an ordered product, an order quantity, and a delivery date; a manufacturing route information storage unit for registering a manufacturing route that is a series of a plurality of steps for manufacturing a product for each product; An equipment information storage unit for registering equipment that can be used in the production process, an allocation point determination unit for determining allocation points, which is a process of manufacturing an intermediate product that allocates the order based on the manufacturing route, and for each order As the allocation target, the order quantity of the order that is the allocation target is assigned to the intermediate product that can allocate the order that is the allocation target when the schedule is started. If there is no inventory quantity of the intermediate product that can allocate the order that is the allocation target, the order allocation unit that allocates the raw material and the allocation target for each intermediate product The replenishment amount of the intermediate product to be allocated is allocated to the intermediate product that can allocate the intermediate product to be allocated up to the remaining inventory amount after allocation, If there is no remaining inventory of the intermediate product that can be allocated to the intermediate product, the intermediate product allocation unit that allocates to the raw material, and the intermediate product or the raw material that reserves the order quantity of the order Based on the results of the above, the load of each process of the production route for producing the order from the intermediate product or raw material is assigned to the equipment that can be used in order from the start of the schedule creation, and the production plan The load of each step of the production route for producing the intermediate product from the intermediate product or raw material based on the result of the intermediate product or raw material that has been prepared and allocated the replenishment amount of the intermediate product can be used And a schedule creation unit that creates a replenishment plan by allocating the equipment in order from the start of schedule creation.

  According to this, since the order product can be manufactured using the intermediate product when the order product is manufactured, the manufacturing lead time from when the order is received until the product is completed can be shortened. In addition, by having multiple allocation points, an order that has no allowance until delivery date is allocated to an intermediate product with an allocation point closer to the lower process, and an order that has a surplus until delivery date is an allocation closer to the upper process. Therefore, it is possible to take a flexible measure such as allocating intermediate products of points, and as a result, delay in delivery can be prevented. Furthermore, since the replenishment plan for the intermediate product used for manufacturing the ordered product is created at the same time, it is possible to cope with keeping an appropriate inventory amount (in-process amount) of the intermediate product.

  Here, in the schedule creation method and the schedule creation program according to the present invention, the production route information storage step further registers a product type that is a kind of raw material for producing the product, and the allocation point determination step includes: For each product type, when the same process is represented as one node and each process of the manufacturing route of the product is expressed in a tree structure, a process that becomes a node branching to a plurality of branches may be allocated and determined as a point.

  Further, in the schedule creation device according to the present invention, the manufacturing route information storage unit further registers a kind that is a kind of raw material for producing the product, and the allocation point determination step is the same for each kind. When each process of the manufacturing route of the product is expressed by a tree structure with a process as one node, a process that becomes a node that branches into a plurality of branches may be allocated and determined as a point.

  According to this, a versatile intermediate product can be allocated and used as an intermediate product of points.

  In the schedule creation method and schedule creation program according to the present invention, the schedule creation method and the schedule creation program further include a step processing capability information storage step for registering processing capability in each step for each product type, and the schedule creation step is based on the processing capability. Then, the load may be calculated.

  In the schedule creation device according to the present invention, the schedule creation device further includes a process capability information storage unit for registering a process capability in each process for each product type, and the schedule creation unit loads the load based on the process capability. You may calculate.

  According to this, when processing the same amount in the same process, it is possible to cope with the case where the processing time is different if the type is different.

  Further, in the schedule creation method and schedule creation program according to the present invention, the manufacturing route information storage step is a time that is a minimum time required between the step and the previous step for each step of the manufacturing route. Further, the schedule creation step may allocate the load of each process to the equipment that can be used in consideration of the time between processes.

  Further, in the schedule creation device according to the present invention, the manufacturing route information storage unit further includes an inter-process time that is a time required for a minimum interval between the process and the previous process for each process of the manufacturing route. The schedule creation unit may allocate the load of each process to the equipment that can be used in consideration of the time between processes.

  According to this, it is possible to create a production plan for orders and a replenishment plan for intermediate products in consideration of the time for transporting between the process and the previous process.

  Further, in the schedule creation method and schedule creation program according to the present invention, the order allocation step is an allocation target in order of early delivery date, and an intermediate product included in the manufacturing route of the ordered product that is the allocation target. As intermediate products that can be allocated, intermediate products that can be allocated to the order that is the target of allocation are allocated in the order of intermediate products with the largest number of processes passed, and can be allocated. When all of the above are eliminated, the same raw material as the product of the ordered product to be allocated is allocated, and the intermediate product allocation step is allocated in the order of the intermediate products having the larger number of processes passed. An intermediate product that is included in the production route of the intermediate product, and that is included in the process that passes until the intermediate product to be allocated is manufactured. As intermediate products that can be allocated, the intermediate products that can be allocated to the intermediate products that are to be allocated are allocated in the order of intermediate products with the largest number of processes passed. When all of them are eliminated, the same raw material as the intermediate product type to be allocated may be allocated.

  Further, in the schedule creation device according to the present invention, the order allocation unit can allocate the order products in the order of early delivery date, and can allocate intermediate products included in the manufacturing route of the product of the order that is the allocation target. As intermediate products, provision is made in the order of intermediate products with the number of processes passed from the intermediate products that can be reserved for the order that is the target of allocation, and there are no intermediate products that can be allocated. The intermediate product allocation unit allocates the same raw material as the product of the ordered product to be allocated, and the intermediate product allocation unit allocates the intermediate products in the order of the number of processes that have passed, and the intermediate product that is the allocation target. An intermediate product included in the manufacturing route of the intermediate product, which is an allocation target as an intermediate product that can be allocated as an intermediate product included in the process of passing through the intermediate product to be allocated. From the intermediate products that can be allocated to the intermediate products, the intermediate products are allocated in the order of the number of processes that have passed through, and when there are no intermediate products that can be allocated, the intermediate products to be allocated You may reserve the same raw materials as the varieties.

According to this, the provisional point intermediate product produced to replenish the provisional point intermediate product included in the production route of the ordered product and completed as an intermediate product, and the provision included in the production route of the ordered product Intermediate products with a large number of processes that have been passed in order from the earliest delivery date as intermediate products that can be allocated to the intermediate products at the point of production. Therefore, the lead time from the process of the allocated intermediate product to the completion of the ordered product can be shortened, and delays in delivery can be prevented. When there are a plurality of orders having the same delivery date, the priority for allocation is increased as the order quantity increases. In addition, when there are a plurality of orders having the same delivery date and the same order quantity, the priority for allocation is increased as the product code is younger. Further, when there are a plurality of orders having the same delivery date and the same order quantity and the same product code, the priority order to be allocated is increased as the order number is smaller. Note that the order of priority of orders to be allocated is not limited to this, and can be set as appropriate.
In addition, since intermediate products with a large number of processes passed in order from the intermediate products with the large number of processes passed are allocated, the lead time from the process of the allocated intermediate products to the completion of the intermediate product is shortened and passed. It is possible to replenish quickly in order from the intermediate product with the largest number of processes. Furthermore, by quickly replenishing the intermediate products with the number of steps passed through in order, the lead time until the order is completed can be shortened by the intermediate product (ie, the number of steps passed). Intermediate products), which can prevent delays in delivery. Here, when there are a plurality of intermediate products having the same number of passing steps, the higher the “target inventory amount—the remaining amount after the allocation is completed”, the higher the priority for allocation. Further, when there are a plurality of intermediate products having the same number of passing processes and the same “target inventory amount—remaining amount after the allocation is completed”, the priority of allocation is increased as the product type code is younger. Note that the priority order of the intermediate products to be allocated is not limited to this, and can be set as appropriate.

  Further, in the schedule creation method and schedule creation program according to the present invention, an intermediate product information storage step for storing an initial inventory quantity and a target inventory quantity that are inventory quantities of the intermediate product at the allocation point at the start of schedule creation, The intermediate product allocating step may calculate the replenishment amount as a difference between a target inventory amount of the intermediate product and a remaining inventory amount after allocating the intermediate product.

  The schedule creation device according to the present invention further includes an intermediate product information storage unit that stores an initial stock quantity and a target stock quantity that are stock quantities of the intermediate product at the allocation point at the start of schedule creation, The product allocation unit may calculate the replenishment amount as a difference between a target inventory amount of the intermediate product and a remaining inventory amount after the intermediate product is allocated.

  According to this, by adjusting the target inventory amount of the intermediate product, the inventory amount (in-process amount) of the intermediate product in the production line can be appropriately adjusted.

  Further, in the schedule creation method and schedule creation program according to the present invention, the intermediate product information storage step further registers a delivery date for replenishment of the intermediate product, and the schedule creation step includes the order or the delivery date of the intermediate product. In order of increasing the number of days divided by the number of remaining processes necessary to manufacture the order or the intermediate product, the load of each process of the manufacturing route is allocated to the equipment that can be used, and the production plan or A replenishment plan may be created.

  Further, in the schedule creation device according to the present invention, the intermediate product information storage unit further registers a delivery date for replenishment of the intermediate product, and the schedule creation unit indicates the number of days until the delivery date of the order or the intermediate product, The production plan or replenishment plan is created by allocating the load of each process of the manufacturing route to the available equipment in ascending order of the value divided by the number of remaining processes required to produce an order or the intermediate product. You can do it.

  According to this, since the process for manufacturing the product of the order can be assigned at an early stage to an order with a close delivery date, delays in the delivery date can be reduced. Also, by registering the delivery date for replenishment of the intermediate product, it is possible to adjust the replenishment time of the intermediate product.

  In the schedule creation method and schedule creation program according to the present invention, the schedule creation method and the schedule creation program further include a period information storage step for registering a period that is a unit of a period for creating a schedule, and the intermediate product information storage step and the schedule creation step include The schedule creation start time may be the time when the period starts.

  The schedule creation device according to the present invention further includes a period information storage unit for registering a period that is a unit of a period for creating a schedule, and the intermediate product information storage unit and the schedule creation unit start schedule creation Time may be the point in time when the period starts.

  According to this, by adjusting the period interval, the schedule creation interval can be adjusted, and the schedule can be flexibly created according to the situation.

  The schedule creation program according to the present invention can be recorded and distributed on a fixed recording medium such as a removable recording medium or a hard disk, or can be distributed via a communication network such as the Internet by wired or wireless telecommunication means. Is possible.

  The schedule creation method, the schedule creation program, and the schedule creation apparatus according to the present invention reduce the number of orders that are delayed in delivery as much as possible, and can perform production while maintaining an appropriate amount of work in progress and replenishment of intermediate products. A plan can be created.

It is a figure which shows the manufacture route of the production line made into object by this embodiment. It is a block diagram of the schedule creation apparatus which concerns on this embodiment. It is the flowchart explaining the procedure of the process of the schedule creation method which concerns on this embodiment. In a present Example, it is a figure which shows the manufacturing route regarding the product which uses the kind A as a raw material, The allocation point is shown by the arrow. In a present Example, it is a figure which shows the manufacture route regarding the product which uses the kind B as a raw material, The allocation point is shown by the arrow.

  Hereinafter, a form for implementing a schedule creation method, a schedule creation program, and a schedule creation device according to the present invention will be described with reference to a specific example with reference to the drawings. In addition, what is demonstrated below is only what was illustrated and does not show the application limit of the schedule creation method and schedule creation program which concern on this invention, and a schedule creation apparatus. That is, the schedule creation method, the schedule creation program, and the schedule creation device according to the present invention are not limited to the following embodiments, and various modifications are possible as long as they are described in the claims. .

  A production route of a production line targeted in this embodiment is shown in FIG. FIG. 1 shows a series of a plurality of steps (that is, a production route) from a raw material to a product of a production line targeted in the present embodiment. As shown in FIG. 1, the manufacturing route is composed of a plurality of processes such as “melting”, “HOT (hot rolling)”, “cold rolling”, from the raw material to the product, There are several facilities that can be used in the process. Then, intermediate products in the process of production and finished products are temporarily stored as necessary. In the present embodiment, it is assumed that there is no lead time from completion as a product until shipment.

  Here, the intermediate product has versatility. As shown in the example of FIG. 1, for example, when using an intermediate product that has passed through the “dissolution” process, the “HOT” process, and the “cold rolling (coarse)” process, using the type A, which is the type of raw material. Can produce all products with product codes 100, 101, 102, 103, 104, 105, 110, 113. In addition, using the product A, a “melting” step, a “HOT” step, a “cold rolling (coarse)” step, a “cold rolling (intermediate)” step, an “intermediate annealing” step, and a “cold rolling (finishing)” step When using an intermediate product that has passed through the above, products with product codes 100, 110, 103, 113, 102, and 105 can be produced.

  Moreover, even if it passes the same manufacturing process if a kind differs, a product will differ. That is, even if an intermediate product that has passed through the “dissolution” process, the “HOT” process, and the “cold rolling (coarse)” process is used using the product type B, the product codes 100, 101, 102, 103, 104, None of the products 105, 110, 113 can be produced.

  First, the schedule creation apparatus according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram of the schedule creation device according to the present embodiment. The schedule creation device 1 includes an arithmetic unit, a storage unit, an input unit, and an output unit, and is mounted on a computer. Here, each part (calculation part, memory | storage part, input part, and output part) of the schedule preparation apparatus 1 shown by FIG. 2 is comprised by computers, such as a general purpose personal computer. Such a computer stores hardware such as a CPU, ROM, RAM, hard disk, and CD-ROM drive, and the hard disk stores a program (this program is recorded on a removable storage medium). Can be installed on a variety of computers). And the above-mentioned each part is constructed | assembled by combining these hardware and software.

  As shown in FIG. 2, the calculation unit includes an allocation point determination unit 11, an order allocation unit 12, an intermediate product allocation unit 13, a schedule creation unit 14, an order information storage unit 21, and manufacturing route information. The storage unit 22, the intermediate product information storage unit 23, the period information storage unit 24, the facility information storage unit 25, and the process throughput information storage unit 26 are configured.

  The order information storage unit 21 stores the order product, the delivery date, the order quantity, and the date when the order is entered as information relating to an order entered before the date of the start of the period stored in the period information storage unit 24 described later. belongs to.

  The manufacturing route information storage unit 22 is for externally registering and storing the type of product, the type of raw material, the order of the process, the order of the process, the time between processes, and the type of process as information on the manufacturing route. Here, the inter-process time means a time that is required to be at least between the process and the previous process.

  The intermediate product information storage unit 23 stores information on intermediate products at the start of schedule creation as information on the intermediate products of the allocation points determined by the allocation point determination unit 11 (to be described later) (hereinafter referred to as “intermediate products”). The initial stock quantity that is the quantity, the target stock quantity that is the stock quantity that is to be retained as the intermediate product, and the delivery date for replenishment of the intermediate product are registered and stored from the outside. The initial inventory quantity is the quantity of intermediate products that are produced to replenish the provisional point intermediate product included in the production route of the ordered product and are completed as the provisional point intermediate product. Here, the provisional intermediate product means an intermediate product that can produce various products and is an intermediate product that reserves an order. The allocation point is a process in which an intermediate product of the allocation point is manufactured, and is determined by the allocation point determination unit 11 described later.

  The period information storage unit 24 is for externally registering and storing a period, which is a unit for creating a schedule from the start of schedule creation, as information about the period. Here, when creating a schedule across a plurality of periods, the order allocating unit 12, the intermediate product allocating unit 13, and the schedule creating unit 14 are arranged in order from the beginning of the schedule generation, in order of period. Suppose that a schedule is created.

  The equipment information storage unit 25 is used for registering and storing equipment, processes that can be used by the equipment, and equipment capacity as information related to the equipment.

  The process capacity information storage unit 26 is for externally registering and storing the process capacity (ton / hour in this embodiment) for each product type in each process as information on the process capacity.

  Here, information registered from outside in the order information storage unit 21, the manufacturing route information storage unit 22, the intermediate product information storage unit 23, the period information storage unit 24, the facility information storage unit 25, and the process throughput information storage unit 26. Is input from an input unit (keyboard or the like) (not shown), recorded on a removable storage medium, or provided via a communication network such as the Internet by wired or wireless electrical communication means at the start of schedule creation. Or stored in a storage unit such as a storage device (auxiliary storage device).

  The allocation point determination unit 11 is for determining allocation points from information on the manufacturing route registered in the manufacturing route information storage unit 22 at the start of schedule creation. Specifically, the allocation point determination unit 11 allocates a node that branches into a plurality of branches as a point when a product manufacturing process is expressed in a tree structure as one node for each product type. The intermediate product manufactured in the determined provision point section (ie, the process expressed as the section) is determined as the provision point intermediate product. The allocation point may be determined by automatically selecting a node that branches into a plurality of branches by calculation of a computer, or may be input from an input unit or recorded in a removable storage medium. Alternatively, it may be determined by selecting a node that branches into a plurality of branches, for example, via a communication network such as the Internet by wired or wireless telecommunication means.

  The order allocating unit 12 is information on the order (order quantity and delivery date) registered in the order information storage unit 21 and the intermediate product registered in the intermediate product information storage unit 23 in order from the start of schedule creation. With reference to the information (initial stock quantity), the order is assigned to the intermediate product or raw material. Specifically, the order allocation unit 12 targets allocations in the order of early delivery dates, and calculates to which intermediate product or raw material the order quantity of the order targeted for allocation is allocated. When there are a plurality of orders having the same delivery date, the priority for allocation is increased as the order quantity increases. In addition, when there are a plurality of orders having the same delivery date and the same order quantity, the priority for allocation is increased as the product code is younger. Further, when there are a plurality of orders having the same delivery date and the same order quantity and the same product code, the priority order to be allocated is increased as the order number is smaller. Note that the order of priority of orders to be allocated is not limited to this, and can be set as appropriate. Further, when creating a schedule across a plurality of periods based on the period registered in the period information storage unit 24, the order allocation unit 12 and a later-described unit will be described in order from the beginning of the schedule creation. It is assumed that schedule creation is performed by the intermediate product allocation unit 13 and a schedule creation unit 14 described later.

  Specifically, the order allocation unit 12 first allocates an order quantity of an order to be allocated to an intermediate product that can be allocated. Here, an intermediate product that can be allocated means an intermediate product that can manufacture an order to be allocated. That is, the intermediate product included in the production route of the ordered product to be allocated is an intermediate product that can be allocated. And for the intermediate product that can be allocated, which is allocated as the order quantity of the order to be allocated, the allocated quantity is deducted from its inventory quantity (or the initial inventory quantity if it is just after the start of schedule creation). The stock quantity is updated. That is, the order quantity of the order is allocated with the upper limit of the inventory quantity of each intermediate product (the initial inventory quantity in the case of immediately after the start of schedule creation). In addition, when there are a plurality of intermediate products that can be allocated, the stock amount (the initial stock amount in the case of immediately after the start of schedule creation) is allocated to the upper limit in order from the intermediate product having the largest number of passing processes. Furthermore, if there is no inventory amount of intermediate products that can be allocated (or the initial inventory amount if it is immediately after the start of schedule creation), allocation is made for the raw material. Here, specifically, the inventory quantity is the initial inventory quantity if it is immediately after the start of schedule creation, the schedule creation spans multiple periods, and if it is outside the period immediately after the schedule creation start The remaining amount that has not been allocated to the order in the order allocation unit 12 after the start of the previous period, and the quantity that has been produced for replenishment within the period of the previous period and has already been completed at the start of the period It is the total of the quantity that has been produced for replenishment within the period of the immediately preceding period, but has progressed only to the intermediate process at the start of the period and has not yet been completed.

  The intermediate product allocation unit 13 sequentially stores information on intermediate products registered in the intermediate product information storage unit 23 after completing the allocation of all orders by the order allocation unit 12 in units of periods from the start of schedule creation. With reference to (target stock amount), an amount to be replenished for the intermediate product (replenishment amount) is allocated to the intermediate product or raw material. Specifically, for each intermediate product, the intermediate product allocating unit 13 determines the remaining amount after all the orders have been allocated by the order allocating unit 12 and the intermediate product registered in the intermediate product information storage unit 23. The replenishment amount is calculated from the difference between the remaining amount and the target stock amount with reference to the information regarding the target stock amount (target stock amount). Then, the allocation is made in the order of intermediate products having the largest number of passing processes, and it is calculated to which intermediate product or raw material the replenishment amount of the allocated intermediate products is allocated. When there are a plurality of intermediate products having the same number of passing steps, the higher the “target inventory amount—the remaining amount after the allocation is completed”, the higher the priority for allocation. Further, when there are a plurality of intermediate products having the same number of passing processes and the same “target inventory amount—remaining amount after the allocation is completed”, the priority of allocation is increased as the product type code is younger. Note that the priority order of the intermediate products to be allocated is not limited to this, and can be set as appropriate. In addition, when a schedule is created across a plurality of periods based on the period registered in the period information storage unit 24, the order allocation unit 12 and the intermediate product are categorized in units of periods from the start of schedule creation. It is assumed that schedule creation is performed by the allocation unit 13 and a schedule creation unit 14 described later.

  Specifically, the intermediate product allocation unit 13 allocates the replenishment amount of the intermediate product to be allocated to an intermediate product that can be allocated (that is, the intermediate product to be allocated can be manufactured). Here, an intermediate product that can be allocated means an intermediate product that can manufacture the intermediate product to be allocated. That is, an intermediate product included in the production route of the intermediate product to be allocated and included in the process that is passed until the intermediate product to be allocated is manufactured is an intermediate product that can be allocated. Become. Then, the reserveable intermediate product allocated as the supplement amount of the intermediate product to be allocated is updated by subtracting the allocated amount from the remaining amount. That is, the replenishment amount of each intermediate product is allocated with the remaining amount of each intermediate product after the allocation of all orders is completed by the order allocation unit 12 as an upper limit. In addition, when there are a plurality of intermediate products that can be allocated, the remaining amount is allocated to the upper limit in order from the intermediate products having the larger number of passing processes. Furthermore, when there is no remaining amount of intermediate product that can be allocated, the material is allocated. Here, the remaining amount is specifically the inventory amount at the start of the period (that is, the initial inventory amount of the intermediate product for each allocation point if it is immediately after the start of the schedule creation, and the schedule creation Is in a period other than the period immediately after the start of schedule creation, the intermediate product of each allocation point remains without being allocated to the order by the order allocation unit 12 after the start of the previous period. The remaining amount was produced for replenishment within the period of the immediately preceding period, and the quantity already produced at the start of the period and the replenishment within the period of the immediately preceding period were produced. From the sum of the amount that has only progressed to the middle of the process and has not yet been completed), at the start of the relevant period, the amount allocated to the intermediate product of each allocation point for all orders by the order allocation unit 12 Is the difference.

  The schedule creation unit 14 refers to the information registered in the period information storage unit 24, the facility information storage unit 25, and the process capability information storage unit 26, and in order from the start of schedule creation, the order allocation unit 12 and an intermediate product allocation unit 13 for creating an order production plan and an intermediate product replenishment plan. Specifically, for each segment as a unit of time, the schedule creation unit 14 applies the load of each process of the manufacturing route for manufacturing the order from the intermediate product or the raw material in which the order quantity is reserved to the equipment that can use the process. In addition to creating a production plan, the load of each process of the production route for manufacturing the intermediate product to which the replenishment amount is allocated or the intermediate product to be supplemented from the raw material is loaded on the equipment that can be used in that process (that is, To create a replenishment plan for intermediate products. In addition, when creating a schedule across a plurality of periods based on the period registered in the period information storage unit 24, the order allocation unit 12 and intermediate products It is assumed that a schedule is created by the allocation unit 13 and the schedule creation unit 14.

  Specifically, the schedule creation unit 14 first calculates, for each segment, the maximum load that can be accumulated in the segment, assuming that the facility capacity registered in the facility information storage unit 25 is applied to the segment. Further, the load of each process is calculated by (the processing amount performed in the process) / (the processing capacity of the process registered in the process capacity information storage unit 26). Here, the processing capacity is determined by the combination of the type and process to be processed in the process. And the load of each process calculated is piled up for every installation in an order from the segment corresponded at the time of the start of the period registered in the period information storage part 24. FIG. For example, the load is accumulated in ascending order of numerical values obtained by dividing the number of days remaining until the delivery date by the number of remaining processes for manufacturing the product or intermediate product. In addition, when loading, the time between processes of each process is considered.

  The order allocation unit 12 assigns the order to the intermediate product or raw material, the intermediate product allocation unit 13 allocates the intermediate product to the intermediate product or raw material, and the schedule creation unit 14 The produced order production plan and intermediate product replenishment plan may be output as calculation results in the schedule creation device 1 to an output unit such as a display or a printer (not shown).

Next, the process procedure of the schedule creation method according to the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart illustrating the processing procedure of the schedule creation method according to the present embodiment.
Note that the processing of the schedule creation method according to the present embodiment described below can be similarly read and executed by the CPU as a schedule creation program in a computer. Further, the schedule creation program can be installed in storage devices of various computers by recording it in a removable storage medium.

  As shown in FIG. 3, in the computer, basic information (that is, information on orders, information on manufacturing routes, information on periods, information on equipment, information on processing capacity of processes) is inputted in advance from an input unit. Recorded in a removable storage medium, or given via a communication network such as the Internet by wired or wireless telecommunication means and registered in the storage unit (STEP 1: order information storage step, manufacturing route) Information storage step, period information storage step, equipment information storage step, process throughput information storage step). Details of this step are described in the order information storage unit 21, the manufacturing route information storage unit 22, the period information storage unit 24, the equipment information storage unit 25, and the process capability information storage unit 26 of the schedule creation device 1 described above. This is the same as the contents, and the description thereof is omitted.

  Further, the allocation points are determined (STEP 2: allocation point determination step). The details of this step are the same as those described in the allocation point determination unit 11 of the schedule creation device 1 described above, and a description thereof is omitted.

  Then, information regarding the intermediate product of the allocation point determined in STEP 2 is input from the input unit, is recorded in a removable storage medium, is given, or a communication network such as the Internet is connected by wired or wireless telecommunication means. Or registered in the storage unit (STEP 3: intermediate product information storage step). The details of this step are the same as the contents described in the intermediate product information storage unit 23 of the schedule creation device 1 described above, and a description thereof is omitted.

  Next, in order from the start of schedule creation, refer to the information related to the order registered in STEP 1 (order quantity and delivery date) and the information related to the intermediate product registered in STEP 3 (initial stock quantity) in the period unit. The intermediate product or raw material is allocated (STEP 4: Order allocation step). Note that this step is the same as that described in the order allocation unit 12 of the schedule creation device 1 described above, and a description thereof will be omitted.

  In addition, after all schedules have been allocated in STEP 4 in order from the start of schedule creation, the intermediate products are replenished with reference to the information (target stock amount) related to the intermediate products registered in STEP 3. It is calculated to which intermediate product or raw material the power (replenishment amount) is allocated (STEP 5: Intermediate product allocation step). Note that this step is the same as the description in the intermediate product allocation unit 13 of the schedule creation device 1 described above, and a description thereof will be omitted.

  Then, referring to the information registered in STEP 1 in order from the start of schedule creation, an order production plan and intermediate product replenishment plan are created based on the results of STEP 4 and STEP 5 (STEP 6). : Schedule creation step). This step is the same as the description of the schedule creation unit 14 of the schedule creation device 1 described above, and a description thereof is omitted.

  In addition, when creating a schedule across a plurality of periods based on information related to the period registered in STEP 1, in order from the start of schedule creation to the end of the last period schedule creation, It is assumed that the process of STEPs 4 to 6 is performed to create a schedule. Then, the process of the schedule creation method ends.

  As described above, according to the schedule creation device, the schedule creation method, and the schedule creation program of the present embodiment, orders that can be produced while reducing the order that is delayed in delivery as much as possible and maintaining an appropriate amount of work in progress. Production plans and replenishment plans for intermediate products can be created.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  Next, a simple example will be described below in order to explain a specific example of the schedule creation device, schedule creation method, and schedule creation program of the present embodiment.

  In this embodiment, as shown in Table 1, the period information storage unit 24 has a period of 7 days, the schedule creation start time is October 08, 2009, and the first period is October 08, 2009 to 2009. The second period is registered as October 14, 2009 to October 21, 1009 (STEP 1).

  In addition, as shown in Table 2, an order product (“product code” in Table 2) is stored in the order information storage unit 21 as information related to orders entered before the start date of the first period registered in the period information storage unit 24. ), Delivery date, order quantity, and the date the order was placed (corresponding to the “order entry date” column in Table 2) (step 1).

  In addition, as shown in Tables 3 to 6, in the manufacturing route information storage unit 22, as the information regarding the manufacturing route, the type of product (corresponding to the column of “product code” in Tables 3 to 6) and the type of raw material (Corresponding to the column of “Product Code” in Tables 3 to 6), process order (corresponding to the column of “Process Serial Number” in Tables 3 to 6), time between processes, type of process (“Process of Tables 3 to 6”) (Corresponding to the column “Code”) is registered (STEP 1). Here, Tables 3 and 4 are production routes of products 100 to 103 using varieties A as raw materials and products 104, 105, 110, and 113 using varieties A as raw materials, and Tables 5 and 6 are varieties B. This is a manufacturing route for products 200 to 203 made from the raw material 200 and products 204, 205, 210, and 213 made from the product B. The production routes for multiple products made from variety A and variety B are divided into Table 3 and Table 4, Table 5 and Table 6 and Table 2, respectively. This is for marking purposes, and one table may be put together.

  Here, as shown in Tables 3 and 4, there are 8 types of products with product code 100, 101, 102, 103, 104, 105, 110, 113 as the raw material, and product B is the raw material. There are eight types of products, product codes 200, 201, 202, 203, 204, 205, 210, and 213. In this embodiment, if the last two digits of the product code are the same, the varieties are different but the passing process is the same. For example, the product code 100 passes through the steps in the order of melting, HOT, cold rolling (coarse), cold rolling (intermediate), intermediate annealing, cold rolling (finishing), finish annealing, correction, surface treatment, slitting, inspection, The product code 200 goes through the same process. The inter-process time is a time that needs to be at least as long as the previous process, and in this embodiment, the unit is a segment. For example, one segment of inter-process time is required between the first process and the second process of the product code 100. In this embodiment, one segment is 8 hours.

  In addition, as shown in Table 7, in the equipment information storage unit 25, as equipment-related information, equipment (corresponding to the column of “equipment code” in Table 7), processes that can be used by the equipment (“process code” in Table 7) The facility capacity is registered (corresponding to the column) (STEP 1).

  Further, as shown in Table 8, the process capability information storage unit 26 stores information on the process capability of each process (corresponding to the column of “process code” in Table 8) for each type (“Type of Table 8”). The processing capacity (ton / hour) corresponding to the “code” column is registered (STEP 1).

  Next, as shown in FIGS. 4 and 5, the allocation point determination unit 11 determines allocation points for each product type (STEP 2). FIG. 4 is a diagram showing a manufacturing route of a product using the product type A as a raw material, and an allocation point is indicated by an arrow. FIG. 5 is a diagram showing a production route of a product using the product type B as a raw material, and an allocation point is indicated by an arrow. In other words, as shown in FIG. 4, for products made from product type A, the steps indicated by the arrows “C1A”, “C2A”, “C3A”, “C4A”, “C5A”, “C6A” The provisional points are intermediate products C1A, C2A, C3A, C4A, C5A, and C6A, which are provisioned points. For example, the reserved intermediate product C1A is an intermediate product that has passed through from the raw material (variety A) to the “melting” step, the “HOT” step, and the “cold rolling (coarse)” step.

  Then, in the intermediate product information storage unit 23, as shown in Table 9, as an intermediate product information, an initial inventory amount (shown in Table 9) which is the amount of the intermediate product of the allocation points determined by the allocation point determination unit 11 as intermediate product information. (Corresponds to the column of “Delivery time setting parameter” shown in Table 9), the target inventory amount that is the amount that should be retained, and the delivery date for replenishment of intermediate products Are registered (STEP 3).

  Next, the order allocation unit 12 is registered in the intermediate product information storage unit 23 and information related to orders (order quantity and delivery date) registered in the order information storage unit 21 in order from the start of schedule creation. Referring to information on intermediate products (initial stock quantity), orders that are placed in order from the earliest date for each period to the order prior to the start date of the period, are subject to allocation in the order of early delivery date, and orders that are eligible for allocation To which intermediate product or raw material is to be allocated (STEP 4). Here, when there are a plurality of orders having the same delivery date, the priority for allocation is increased as the order quantity increases. In addition, when there are a plurality of orders having the same delivery date and the same order quantity, the priority for allocation is increased as the product code is younger. Further, when there are a plurality of orders having the same delivery date and the same order quantity and the same product code, the priority order to be allocated is increased as the order number is smaller.

  First, the schedule of the first period is created, and as shown in Table 2, order numbers 1 to 6 and 11 to 16, which are orders entered before the start date of the first period, are allocated. In this embodiment, the order quantities 1 to 4 and 11 to 14 are the same. Therefore, according to the priority order based on the order quantity, the order numbers 3 and 13 have the same priority order. Further, according to the priority order based on the product code, the product code of the order number 3 is 102 and the product code of the order number 13 is 202, order number 3 has the highest priority. Therefore, in this embodiment, the allocation is made from the order number 3.

  In this embodiment, first, the allocation is started with the order of order number 3 as the allocation target. Since the order of order number 3 is product code 102, C6A, C3A, C2A, and C1A are intermediate products that can be allocated (see FIG. 4). Reserve for C6A. All the initial stock quantity 50 tons of the intermediate product C6A is reserved for the order quantity 72.1 tons. Next, the remaining order quantity 22.1 tons (72.1 tons-50 tons) of order number 3 is allocated to the intermediate product C3A having the next number of passing steps after the intermediate product C6A. At this time, the inventory amount of the intermediate product C6A is updated to 0 tons (initial inventory amount 50 tons-50 tons), and the inventory amount of the intermediate product C3A is updated to 27.9 tons (initial inventory amounts 50 tons to 22.1 tons). The In this way, the order quantity 72.1 tons of the order number 3 was allocated to the intermediate products C6A and C3A. In addition, the order quantity of 32.1 tons of order number 3 was allotted for intermediate products C6A and C3A. However, if the intermediate products C6A, C3A, C2A, C1A and the number of passing processes were large, they were reserved. In this case, if there is no initial stock amount of all intermediate products, the raw material is allocated. Subsequently, the remaining orders (in the present embodiment, order numbers 1, 2, 4 to 6 and 11 to 16) are allocated to intermediate products or raw materials in the same manner.

  As described above, Table 10 shows the result of allocating the order quantities of all orders to intermediate products or raw materials. In Table 10, the “order number” column corresponds to the order to be allocated, the “product code” column corresponds to the product type of the order to be allocated, and the “product code” column is allocated. It corresponds to the varieties of the target order. “Allocated intermediate product or raw material” corresponds to the intermediate product for which the order to be allocated is allocated, and “Allocated amount” is the intermediate product or raw material for which the order to be allocated is allocated. Is equivalent to

  Then, the intermediate product allocating unit 13 enters the period from the start of the schedule creation in units of periods, and for each intermediate product, the order allocating unit 12 enters from the earliest order for each period before the start date of the period. Regarding the order, the remaining amount after the allocation of all orders is completed is calculated (STEP 5). In this embodiment, at the start of the first period stored in the period information storage unit 24, the remaining amount of each intermediate product after all orders are allocated to intermediate products or raw materials by the order allocation unit 12 11 and so on.

  Then, the intermediate product allocating unit 13 in order from the start of schedule creation in units of periods, the remaining amount of each intermediate product calculated as described above and information on the intermediate product registered in the intermediate product information storage unit 23 (target inventory amount) ) To calculate the replenishment amount from the difference from the target inventory amount with reference to), and allocate the replenishment amount in the order of intermediate products with the largest number of passing processes, and allocate the replenishment amount of the intermediate products to be allocated to which intermediate product or raw material (STEP 5). Here, when there are a plurality of intermediate products having the same number of passing processes, the higher the “target inventory amount (Table 9) —the remaining amount after allocation (Table 11)”, the higher the priority for allocation. Further, when there are a plurality of intermediate products having the same number of passing processes and the same “target inventory (Table 9) —remaining amount after allocation (Table 11)”, the priority order to be allocated as the product code is younger To increase. In this embodiment, the number of passing steps is 9 for the intermediate products C5A and C5B. Then, “target inventory quantity—remaining quantity after allocation” is the same for C5A of 50−6 = 44 tons and C5B of 100−56 = 44 tons. Accordingly, since C5A is A and C5B is B, C5A has the highest priority in the product type code. As described above, first, C5A is an allocation target, and then C5B is an allocation target.

  In this embodiment, first, an intermediate product C5A having nine passing steps is allocated (see FIG. 5), and is calculated from the target inventory amount 50 tons of the intermediate product C5A registered in the intermediate product information storage unit 23. The intermediate product C1A, C2A, C3A, which can produce the intermediate product C5A for replenishment of the intermediate product C5A, with a replenishment amount of 44 tons (50 ton-6 tons) minus the remaining 6 tons (see Table 11) In C4A (see FIG. 4), provision is made in the order of intermediate products having the largest number of passing processes.

  Here, the replenishment amount of 44 tons of the intermediate product C5A is first allocated to the remaining amount of 11.5 tons (see Table 11) of the intermediate product C4A, which is the eight processes having the largest number of passing processes. The remaining replenishment amount of 32.5 tons (44 tons to 11.5 tons) is allocated to the remaining amount of 7.3 tons (see Table 11) of the intermediate product C3A having the next largest number of passing steps. Further, the remaining replenishment amount of 25.2 tons (32.5 tons−7.3 tons) is allocated to C2A having the next largest number of passing processes. As described above, since the replenishment amount 44 tons of the intermediate product C5A is allotted to the intermediate products C4A, C3A, C2A, the intermediate product C1A is not allocated. At this time, the remaining amount of the intermediate product C4A is updated to 0 ton, the remaining amount of the intermediate product C3A is updated to 0 ton, and the remaining amount of the intermediate product C2A is updated to 3.8 ton (29 ton-25.2 ton).

  Next, the remaining amount 56 calculated from the target stock amount 100 tons of the intermediate product C5B registered in the intermediate product information storage unit 23, with the intermediate product C5B having the number of passing steps of 9 being allocated (see FIG. 5). Intermediate products C1B and C2B capable of producing intermediate product C5B in the same manner for the replenishment amount (44 tons = 100 tons−56 tons) minus 0.0 tons (see Table 11) , C3B, C4B (see FIG. 5) are allocated in the order of intermediate products with the largest number of passing steps. Subsequently, the replenishment amount of the remaining intermediate product (in this embodiment, C1A, C2A, C3A, C4A, C6A, C1B, C2B, C3B, C4B, C6B) is allocated to the intermediate product or raw material in the same manner.

  As described above, Table 12 shows the result of allocating the replenishment amount of all intermediate products to the intermediate products or raw materials. In Table 12, the column “order number” corresponds to the serial number of the intermediate product to be allocated (in this embodiment, starts from number 21), and the column “product code” is the allocation target. The column of “product code” corresponds to the product of the intermediate product to be allocated. The column of “Allocated intermediate product or raw material” corresponds to the intermediate product or raw material for which the intermediate product to be allocated is allocated, and the intermediate product for which “Allocated amount” is to be allocated is allocated. This corresponds to the amount of intermediate product or raw material.

  When the results of Table 12 calculated by the intermediate product allocation unit 13 are collected, the supplement information shown in Table 13 is obtained. Table 13 summarizes the replenishment amount for each intermediate product to be allocated in Table 12. In Table 13, the order numbers 21 to 32 in which the column of “order input date” is October 08, 2009, which is the first period start date, are supplemented by the intermediate product allocation unit 13 at the start of the first period. Is determined. Here, the column “order quantity” corresponds to the replenishment quantity for replenishing the intermediate product. The column “Delivery date” is a delivery date for achieving this replenishment, and corresponds to the delivery date for replenishment registered in the intermediate product information storage unit on the first period start date (corresponding to the “Delivery time setting parameter” column in Table 9). ). In this embodiment, since the delivery date for replenishment is 7 days for all products, the delivery date is all October 15, 2009.

  Then, the schedule creation unit 14 refers to the information registered in the period information storage unit 24, the facility information storage unit 25, and the process capability information storage unit 26, and in order from the start of schedule creation, in order units Based on the results of the control unit 12 and the intermediate product allocation unit 13, for each segment as a unit of time, the load of each process of the manufacturing route for manufacturing the order from the intermediate product or raw material in which the order quantity is allocated is Equipment that can be used to load each process of the manufacturing route that produces intermediate products that have been replenished, or intermediate products that should be replenished from raw materials, while creating a production plan. The intermediate product replenishment plan is carried out (STEP 6). In this embodiment, one segment is set to 8 hours, and the maximum load that can be loaded on the segment is set to the facility capacity registered in the facility information storage unit 25 in 8 hours (in the column of “equipment capacity” in Table 7 described above). Equivalent)). Further, the load (time) of each process is calculated by the processing capacity (ton) performed in that process / the processing capacity (ton / Hr) registered in the process capacity information storage unit 26. Here, the processing capacity is determined by the combination of the type and process to be processed in the process, and corresponds to the column of “Processing capacity” in Table 5 described above in this embodiment.

  Here, in this example, Table 14 shows the load of each process at the start of the first period calculated by the schedule creation unit 14. In Table 14, the load (time) of each process at the start of the first period corresponds to the column of “processing time”. In addition, the column “processing capability” in Table 14 refers to “processing capability” shown in Table 8 above. In Table 14, job numbers are assigned as serial numbers in the order in which orders are allocated by the order allocation unit 12, and then in the order in which intermediate products are allocated by the intermediate product allocation unit 13.

  In Table 14, for example, job number 1 is “product code 102” (product type is “product code A”) which is an order product of “order number 3”, and for this order, the order quantity is changed to intermediate product C6A. Since 50.0 tons have been allocated, the intermediate product C6A is used, and manufacturing starts from the “09) surface treatment” process, which is “process serial number 8”. Since the “processing capability” in the “09) surface treatment” process is 3 (tons / Hr), the “treatment time” is 50.0 tons ÷ 3 (tons / Hr) = 16.7 (Hr). In Table 14, job numbers 14 to 32 in which “product code” is an intermediate product code are information on processes for supplementing the intermediate product.

  The start of the periods registered in the period information storage unit 24 in ascending order of the numerical value obtained by dividing the calculated load of each process by the number of remaining days until the delivery date divided by the number of remaining processes for manufacturing the product or intermediate product It is piled up for each equipment in order from the segment corresponding to time.

  In this example, the process of job number 4 in Table 14 has 2 days remaining until the delivery date and 6 processes remaining, and most “manufactured the product or intermediate product with the remaining days until delivery date” The numerical value divided by the number of remaining processes to do is small. Therefore, the load ("processing time" shown in Table 14) is loaded on the segment corresponding to 0:00 to 8:00 on October 08, 2009 for the equipment CR03 that can process the process of job number 4. Next, the process with the smaller “number of days remaining until delivery date divided by the number of remaining processes for manufacturing the product or intermediate product” is the process of job number 5 in Table 14, so the load of this process is also Stack in the same way. In the same manner, the load of each process shown in Table 14 is accumulated in a segment corresponding to 0:00 to 8:00 on October 08, 2009. Then, loads are sequentially applied to the segments after the segment corresponding to 8:00 to 16:00 on October 08, 2009.

  In this way, the calculated load of each process is registered in the period information storage unit 24 in ascending order of the numerical value obtained by dividing the number of remaining days until the delivery date by the number of remaining processes for manufacturing the product or intermediate product. Tables 15 to 17 show some of the results of loading for each facility in order from the segment corresponding to the start of the period.

In Table 15, the first to tenth lines corresponding to job number 1 manufacture 102, which is the product of the order of “order number 3” (order quantity is 72.1 tons, delivery date is October 15, 2009). All of the first to tenth steps (corresponding to the column of “step number” shown in Table 15) are described. And the order of “order number 3” starts from the 8th process using the intermediate product C6A 50 tons from the above calculation result (see Table 14). , Equipment code, order number, start date, start time, end date, and end time are set. And the operation | work of each process means performing as follows. In Table 15, in the column of “manufacturing code”, the allocated intermediate product C6A is described in the process before the eighth process to start manufacturing, and in the processes after the eighth process to start manufacturing. The product number is described.
・ "09) Surface treatment" of the 8th step is performed between 16:00:00 on October 09, 2009 and 00:00:00 on October 10, 2009, using the equipment SF00. To do.
・ The “10) slit” process of the ninth process is performed between 8:00:00 on October 13, 2009 and 16:00:00 on October 13, 2009 using the equipment SF02. Do.
-The "12) Inspection slit" process of the 10th process is performed between 00:00:00 on October 15, 2009 and 8:00:00 on October 15, 2009 using the equipment IN00. To do.

  Further, from the above calculation results, the remaining 22.1 tons of the order of “order number 3” are manufactured using C3A. Therefore, in Table 15, in the 11th to 20th lines corresponding to job number 2 The same is described.

  Table 16 is the same description method as Table 15. The first to ninth lines corresponding to job number 12 are orders of “order number 5” (order quantity is 10.5 tons, delivery date is October 2009) All of the first to ninth steps (corresponding to the column of “step number” shown in Table 16) for manufacturing 104, which is a product on the 15th), are described. Then, the order of “order number 5” starts from the fourth process using 10.5 tons of the intermediate product C1A from the above calculation result (see Table 14). In the process, an equipment code, an order number, a start date, a start time, an end date, and an end time are set.

  Table 17 is also the same description method as Table 15, and the first to ninth lines corresponding to job number 17 are manufactured to replenish 14.8 tons of C5B, which is an intermediate product of “order number 22”. All of the first to ninth steps (corresponding to the column of “step number” shown in Table 17) are described. And, since the intermediate product of “order number 22” starts production from the ninth process using 14.8 tons of the intermediate product C4B from the above calculation result (see Table 14), The equipment code, order number, start date, start time, end date, and end time are set. In Table 17, the “09) surface treatment” step of the ninth step is performed using the equipment SF00, from 16:00:00 on October 10, 2009 to 0:00:00 on October 11, 2009. Means to do in seconds. In the job number 17, 14.8 tons of the total replenishment amount of the intermediate product C4B 44.0 tons is replenished, and the remaining 29.2 tons (44.0 tons-14.8 tons) is then ordered. This means that the job number 41 for manufacturing the product No. 19 is replenished. Note that the last two lines of the job number 41 in Table 17 indicate a process of manufacturing the product 200 with the order number 19 using 29.2 tons of the intermediate product C4B later.

From the above Tables 15 and 16, the following can be understood.
・ Order with order number 3, which is an earlier delivery date, is reserved for intermediate products that are closer to the lower process (out of 72.1 tons of order quantity, 50 tons for C6A and 22.1 tons for C3A) .
-The order number 5 which is an order with a late delivery date allocates all the order quantity 10.5 tons to the intermediate product C1A closer to the upper process.
Therefore, a production plan for reducing the delivery delay can be made.

  Table 17 also shows that a replenishment plan for replenishing the intermediate product C5B that has been reduced from the target stock quantity for order allocation can be established at the same time.

  With the above, the schedule creation for the first period is completed, and the production plan for the order for the first period and the replenishment plan for intermediate products can be drawn up (step S6). Then, returning to step S4, the second period schedule creation is started by repeating steps S4 to S6 as in the first period schedule creation.

  In order to create a schedule for the second period, first, as shown in Table 2, the order allocation unit 12 relates to order numbers 7 to 10 and 17 to 20 which are orders entered before the start date of the second period. Then, the allocation is made in the order of early delivery, and the intermediate product or raw material to which the order quantity of the order subject to the allocation is allocated is calculated (STEP 4).

In the present embodiment, provision is made from the order number 7 with the earliest delivery date, the largest order quantity, and the earliest product code. Since the order number 7 is the product code 110, C5A, C4A, C3A, C2A, and C1A are intermediate products that can be allocated. Among them, the intermediate product C5A having the largest number of passing steps is allocated. Become. At the time of allocation, the order allocation unit 12 determines whether the intermediate product C5A inventory quantity at the start of the second period is less than the first period replenishment result and the information about the intermediate product registered in the intermediate product information storage unit 23. Calculate the breakdown of.
(A) 6 tons, which is the remaining amount of the initial inventory that was not allocated when the order was allocated after the start of the first period (see Table 11)
(B) Produced to replenish C5A within the period of the first period, and 18.8 tons, which is already completed as C5A at the start of the second period (c) Replenished with C5A within the period of the first period 25.2 tons, which is an amount that has not been completed as C5A at the start of the second period, and has not been completed yet, and in the inventory quantity of (a) to (c) First, 44 tons of order number 7 is allocated to 6 tons of (a). Next, 18.8 tons are allocated to (b). Finally, 19.2 tons of (c) is reserved. As a result, the order amount of 44 tons of order number 7 is allotted to the intermediate product C5A (44 tons = 6 tons + 18.8 tons + 19.2 tons).

  Subsequently, the remaining orders (order numbers 8 to 10 and 17 to 20) are similarly allocated. Table 18 shows the result of the allocation. In Table 18, the column of “order number” corresponds to the order to be allocated, the column of “product code” corresponds to the type of product of the order to be allocated, and “allocated intermediate product” The column “or raw material” corresponds to an intermediate product that has allocated an order to be allocated, and “allocated amount” corresponds to the amount of an intermediate product or raw material that has allocated an order to be allocated.

  Here, in Table 18, job numbers 14 to 16, 18 to 20, 22, and 24 are also described in Table 12. For example, job number 14 produces 11.5 tons of intermediate product C5A from intermediate product C4A during the period of the first period, and then orders number 7 to 11.5 tons at the start of the second period. It means that it was allocated.

  Next, the intermediate product allocation unit 13 refers to the remaining amount of each intermediate product calculated by the order allocation unit 12 and the target inventory that refers to the information (target inventory amount) related to the intermediate product registered in the intermediate product information storage unit 23. The amount of replenishment is calculated from the difference from the amount, and is allocated in the order of intermediate products with the largest number of passing processes, and it is calculated to which intermediate product or raw material the replenishment amount of the allocated intermediate product is allocated (STEP 5) .

  In this embodiment, first, at the start of the second period, the intermediate product allocation unit 13 calculates the remaining amount of the intermediate product at each allocation point after the order allocation unit 12 allocates the order. The results are shown in Table 19.

Here, at the start of the second period, the remaining amount calculated by the intermediate product allocation unit 13 is specifically a value obtained by subtracting (b) from the following (a).
(B) The remaining amount that is not allocated to the order in the order allocation unit 12 after the start of the first period of the intermediate product of the allocation point, and the production to be replenished within the period of the first period, The sum of the quantity already completed at the start of the second period and the quantity that was produced for replenishment within the period of the first period, but was only completed halfway at the start of the second period and has not yet been completed (B) At the start of the second period, the order allocation unit 12 (STEP 4) allocates all orders to the intermediate product of each allocation point. For example, in the case of the intermediate product C5A, (b) is 50 tons, (B) is 50 tons (44 tons for order number 7 and 6 tons for order number 9), so the remaining amount is 0 tons.

  Next, an intermediate product to be allocated is calculated from the intermediate products to be allocated. In the present embodiment, among the intermediate products C5A and C5B having the largest number of passing processes of 9, intermediate product C5B having a large difference between the target stock amount and the remaining amount is calculated as the first intermediate product to be allocated. Then, the replenishment amount 85. 5 obtained by subtracting the remaining amount 14.8 tons (see Table 19) calculated from the target stock amount 100 tons of the intermediate product C5B registered in the intermediate product information storage unit 23 with respect to the intermediate product C5B. 2 tons (100 tons-14.8 tons) is the most number of passing steps among intermediate products C1B, C2B, C3B, C4B (see FIG. 6) that can produce intermediate product C5B for replenishment of intermediate product C5B Reserve in the order of intermediate products with the largest number.

  Here, the replenishment amount of 85.2 tons of the intermediate product C5B is first allocated to the remaining amount of 63.2 tons (see Table 19) of the intermediate product C4B, which is the eight processes having the largest number of passing processes. The remaining replenishment amount of 22.0 tons (85.2 tons-63.2 tons) is allocated to the intermediate product C3B (remaining amount of 100.0 tons) having the next largest number of passing steps. As described above, since the replenishment amount 85.2 tons of the intermediate product C5B is allotted to the intermediate products C4B and C3B, no provision is made to the intermediate products C2B and C1B. At this time, the remaining amount of the intermediate product C4B is updated to 0 ton, and the remaining amount of the intermediate product C3B is updated to 78.0 ton (100.0 ton-22.0 ton).

  Next, an intermediate product C5A having a passing process number of 9 is allocated (see FIG. 5), and the remaining calculated from the target stock quantity 50.0 tons of the intermediate product C5A registered in the intermediate product information storage unit 23 Intermediate product C5A can be manufactured for replenishment of intermediate product C5A in the same manner using the replenishment amount (50.0 ton = 50 ton-0.0 ton) minus 0.0 ton (see Table 19) Among intermediate products C1A, C2A, C3A, and C4A (see FIG. 5), provision is made in the order of intermediate products having the largest number of passing steps.

  Here, the replenishment amount 50.0 tons of the intermediate product C5A is not allocated because the intermediate product C4A, which is the eight steps with the largest number of passing steps, is the remaining amount 0.0 tons (see Table 19). Next, the remaining amount of the intermediate product C3A having a large number of passing processes is allocated to 1.0 ton. The remaining replenishment amount of 49.0 tons (50.0 tons-1.0 tons) is allocated to the intermediate product C2A (remaining amount of 50.0 tons) having the next largest number of passing steps. As described above, since the replenishment amount 85.2 tons of the intermediate product C5A is allotted to the intermediate products C3A and C2A, no provision is made to the intermediate product C1A. At this time, the remaining amount of the intermediate product C3A is updated to 0 ton, and the remaining amount of the intermediate product C2A is updated to 1.0 ton (50.0 ton-49.0 ton).

  Here, referring to Table 20 showing the result of the replenishment plan of the order number 34 (this result is created by the schedule creation unit 14 (STEP 6) to be described later), C3A (1. 0 tons) is not completed as C3A at the time of allocation (as of October 15, 2009 at the start of the second period), and has progressed only to process 04) cooling (intermediate) in the middle is there. Subsequent processes are planned to pass in the order of 05) intermediate annealing, 06) cold rolling (finishing), and 07) finish annealing. In other words, at the start of the second period, the intermediate product allocation unit 13 produced the intermediate product to be replenished within the period of the first period. It can be seen that it has been allocated to the amount of intermediate products that have not yet been completed. In Table 20, “equipment code”, “start date”, “start time”, “end date”, and “end time” after the process serial number 8 are blank. Since this is a process performed after the end of the term, it is blank.

  Subsequently, the replenishment amount of the remaining intermediate product (in this embodiment, C1A, C2A, C3A, C4A, C6A, C1B, C2B, C3B, C4B, C6B) is similarly allocated to the intermediate product or raw material.

  Table 21 shows supplementary information that summarizes the results of the provision of the intermediate product allocation unit 13 for the intermediate products or raw materials by the intermediate product allocation unit 13 as described above.

  In Table 21, the order numbers 33 to 44 in which the column of “order input date” is October 15, 2009, which is the second period start date, are replenished by the intermediate product allocation unit 13 at the start of the second period. Is determined. Here, the column “order quantity” corresponds to the replenishment quantity for replenishing the intermediate product. The column “Delivery date” is a delivery date for achieving this replenishment, and corresponds to the delivery date for replenishment registered in the intermediate product information storage unit on the start date of the second term (corresponding to the “Delivery time setting parameter” column in Table 9). ). In this embodiment, since the delivery date for replenishment is 7 days for all products, the delivery date is all October 22, 2009.

  Then, the schedule creation unit 14 refers to the information registered in the period information storage unit 24, the facility information storage unit 25, and the process processing capacity information storage unit 26, and the order allocation unit 12 and the intermediate product allocation unit 13 Based on the result, the production plan for the second order and the replenishment plan for the intermediate product are created (STEP 6). The creation of the production plan for the second order and the replenishment plan for the intermediate product performed by the schedule creation unit 14 (STEP 6) in the present embodiment are the creation of the production plan for the first order and the intermediate product described above. This is the same as the creation of the replenishment plan, and detailed description is omitted. Here, in this embodiment, the schedule result created as the production plan for order number 8 as part of the production plan for the second order created by the schedule creation unit 14 and the replenishment plan for the intermediate product is shown in Table 22. Shown in Here, Table 22 is described in the same manner as Table 15 described above, and in the first to eleventh lines corresponding to job number 14, intermediate product C5A of “order number 21” is set to 11 using intermediate product C4A. Manufactured to replenish 5 tons (completed as C5A on October 11, 2009), then use 11.5 tons to order 110 which is the product of the order of “Order Number 7” The process for manufacturing is described. In the 12th to 22nd lines corresponding to the job number 15, the intermediate product C3A is manufactured to be supplemented with 7.3 tons of the intermediate product C5A of the “order number 21”, and then the 7.3 A process for manufacturing 110, which is a product of an order of “order number 7”, is described. Further, the 23rd to 33rd lines corresponding to the job number 36 describe steps for manufacturing 110 which is an ordered product of “order number 7” using 6 tons of the intermediate product C5A. Further, in the 34th to 44th lines corresponding to the job number 37, the intermediate product C2A is manufactured to be replenished with 19.2 tons of the intermediate product C5A of the “order number 21”. A process for manufacturing 110, which is a product of an order of “order number 7”, is described.

  As described above, the schedule creation for the second period is completed, the production plan for the order for the second period and the replenishment plan for the intermediate product can be made (step S6), and the schedule creation process is terminated.

DESCRIPTION OF SYMBOLS 1 Schedule creation apparatus 11 Allocation point determination part 12 Order allocation part 13 Intermediate product allocation part 14 Schedule creation part 21 Order information storage part 22 Manufacturing route information storage part 23 Intermediate product information storage part 24 Period information storage part 25 Facility information Storage unit 26 Process capability information storage unit S1 Order information storage step, manufacturing route information storage step, period information storage step, facility information storage step, process processing capability information storage step S2 Reserve point determination step S3 Intermediate product information storage step S4 Order allocation step S5 Intermediate product allocation step S6 Schedule creation step

Claims (24)

A schedule creation method for creating a production plan for orders and a replenishment plan for intermediate products for a production line that manufactures products in a plurality of processes,
The processing executed by the computing unit of the computer is
An order information storage step for registering an order product, an order quantity, and a delivery date;
A manufacturing route information storage step for registering a manufacturing route that is a series of a plurality of processes for manufacturing a product for each product;
Equipment information storage step for registering equipment that can be used in the process;
An allocation point determining step for determining an allocation point, which is a process of manufacturing an intermediate product for allocating the order based on the manufacturing route;
As an object to be allocated for each order, the order quantity of the order to be allocated is set to the intermediate product capable of allocating the order to be allocated, with an inventory quantity at the start of schedule creation as an upper limit. An order allocating step for allocating raw materials if the inventory of the intermediate product capable of allocating the order to be allocated is not available;
As the allocation target for each intermediate product, the replenishment amount of the intermediate product that is the allocation target is added to the intermediate product that can allocate the intermediate product that is the allocation target. An intermediate product allocating step of allocating to the raw material if there is no remaining inventory of the intermediate product that can be allocated with an inventory amount as an upper limit and the intermediate product to be allocated can be allocated;
Based on the result of the intermediate product or raw material that reserves the order quantity of the order, the load of each process of the manufacturing route for manufacturing the order from the intermediate product or raw material is started at the facility that can be used at the start of scheduling Of the production route for producing the intermediate product from the intermediate product or the raw material based on the result of the intermediate product or the raw material allocated with the intermediate product in order, and creating a production plan. A schedule creation step of allocating the load of each process to the equipment that can be used in order from the start of schedule creation and creating a replenishment plan;
A schedule creation method characterized by comprising: The manufacturing route information storing step includes
Further registering a variety that is a kind of raw material for producing the product,
The allocation point determining step includes:
For each product type, when each process of the manufacturing route of the product is expressed by a tree structure with the same process as one node, a process that becomes a node branching to a plurality of branches is allocated and determined as a point. The schedule creation method according to claim 1. Process capacity information storage step for registering the process capacity in each process for each product type,
Further comprising
The schedule creation step includes:
The schedule creation method according to claim 1, wherein the load is calculated based on the processing capability. The manufacturing route information storing step includes
For each process of the manufacturing route, further register an inter-process time that is a time that needs to be at least between the process and the previous process,
The schedule creation method according to any one of claims 1 to 3, wherein the schedule creation step assigns the load of each process to the equipment that can be used in consideration of the time between the processes. The order allocation step includes:
Can be allocated to the order to be allocated as an intermediate product that can be allocated as an intermediate product that can be allocated to the intermediate product included in the manufacturing route of the product of the order that is the allocation target. All intermediate products are allocated in the order of the number of processes that have passed through, and when all the intermediate products that can be allocated are exhausted, the same raw material as the product type of the order product to be allocated is allocated. ,
The intermediate product allocation step includes:
The intermediate products in the order of the number of processes that have passed are targeted for allocation, and the intermediate products that are included in the production route of the intermediate product that is the allocation target and pass until the intermediate products that are the allocation target are manufactured. As intermediate products that can be allocated to intermediate products that are included in the process to be allocated, the intermediate products that are allocated to the intermediate products that are to be allocated are allocated in the order of intermediate products that have been passed through the largest number of processes. 5. The schedule creation method according to claim 2, wherein when all the intermediate products that can be allocated disappear, the same raw material as the type of the intermediate product to be allocated is allocated. . An intermediate product information storage step for storing an initial stock amount and a target stock amount, which are stock amounts of intermediate products at the allocation point at the start of schedule creation;
Further comprising
The intermediate product allocation step includes:
6. The replenishment amount is calculated as a difference between a target inventory amount of the intermediate product and a remaining inventory amount after the intermediate product is allocated. Schedule creation method. The intermediate product information storing step further registers a delivery date for replenishment of the intermediate product,
In the schedule creation step, each process of the manufacturing route is performed in ascending order of the value obtained by dividing the number of days until the delivery date of the order or the intermediate product by the number of remaining processes required until the order or the intermediate product is manufactured. The schedule creation method according to claim 1, wherein a production plan or a replenishment plan is created by allocating the load of the equipment to the equipment that can be used. Period information storage step for registering a period that is a unit of a period for creating a schedule,
Further comprising
The schedule creation method according to any one of claims 1 to 7, wherein the intermediate product information storage step and the schedule creation step have a schedule creation start time as a time when the period starts. A schedule creation program that creates a production plan for orders and a replenishment plan for intermediate products for production lines that produce products in multiple processes,
An order information storage step for registering an order product, an order quantity, and a delivery date;
A manufacturing route information storage step for registering a manufacturing route that is a series of a plurality of processes for manufacturing a product for each product;
Equipment information storage step for registering equipment that can be used in the process;
An allocation point determining step for determining an allocation point, which is a process of manufacturing an intermediate product for allocating the order based on the manufacturing route;
As an object to be allocated for each order, the order quantity of the order to be allocated is set to the intermediate product capable of allocating the order to be allocated, with an inventory quantity at the start of schedule creation as an upper limit. An order allocating step for allocating raw materials if the inventory of the intermediate product capable of allocating the order to be allocated is not available;
As the allocation target for each intermediate product, the replenishment amount of the intermediate product that is the allocation target is added to the intermediate product that can allocate the intermediate product that is the allocation target. An intermediate product allocating step of allocating to the raw material if there is no remaining inventory of the intermediate product that can be allocated with an inventory amount as an upper limit and the intermediate product to be allocated can be allocated;
Based on the result of the intermediate product or raw material that reserves the order quantity of the order, the load of each process of the manufacturing route for manufacturing the order from the intermediate product or raw material is started at the facility that can be used at the start of scheduling Of the production route for producing the intermediate product from the intermediate product or the raw material based on the result of the intermediate product or the raw material allocated with the intermediate product in order, and creating a production plan. A schedule creation step of allocating the load of each process to the equipment that can be used in order from the start of schedule creation and creating a replenishment plan;
And a schedule creation program that is read out by a calculation unit in a computer and causes each step to be executed. The manufacturing route information storing step includes
Further registering a variety that is a kind of raw material for producing the product,
The allocation point determining step includes:
For each product type, when each process of the manufacturing route of the product is expressed by a tree structure with the same process as one node, a process that becomes a node branching to a plurality of branches is allocated and determined as a point. The schedule creation program according to claim 9. Process capacity information storage step for registering the process capacity in each process for each product type,
Further comprising
The schedule creation step includes:
The schedule creation program according to claim 9 or 10, wherein the load is calculated based on the processing capability. The manufacturing route information storing step includes
For each process of the manufacturing route, further register an inter-process time that is a time that needs to be at least between the process and the previous process,
The schedule creation program according to any one of claims 9 to 11, wherein the schedule creation step assigns a load of each process to the equipment that can be used in consideration of the time between the processes. The order allocation step includes:
Can be allocated to the order to be allocated as an intermediate product that can be allocated as an intermediate product that can be allocated to the intermediate product included in the manufacturing route of the product of the order that is the allocation target. All intermediate products are allocated in the order of the number of processes that have passed through, and when all the intermediate products that can be allocated are exhausted, the same raw material as the product type of the order product to be allocated is allocated. ,
The intermediate product allocation step includes:
The intermediate products in the order of the number of processes that have passed are targeted for allocation, and the intermediate products that are included in the production route of the intermediate product that is the allocation target and pass until the intermediate products that are the allocation target are manufactured. As intermediate products that can be allocated to intermediate products that are included in the process to be allocated, the intermediate products that are allocated to the intermediate products that are to be allocated are allocated in the order of intermediate products that have been passed through the largest number of processes. 13. The schedule creation program according to claim 9, wherein when there are no more intermediate products that can be allocated, the same raw materials as the types of the intermediate products to be allocated are allocated. . An intermediate product information storage step for storing an initial stock amount and a target stock amount, which are stock amounts of intermediate products at the allocation point at the start of schedule creation;
Further comprising
The intermediate product allocation step includes:
14. The replenishment amount is calculated as a difference between a target stock amount of the intermediate product and a remaining stock amount after the intermediate product is allocated. Schedule creation program. The intermediate product information storing step further registers a delivery date for replenishment of the intermediate product,
In the schedule creation step, each process of the manufacturing route is performed in ascending order of the value obtained by dividing the number of days until the delivery date of the order or the intermediate product by the number of remaining processes required until the order or the intermediate product is manufactured. The schedule creation program according to any one of claims 9 to 14, wherein a production plan or a replenishment plan is created by allocating the load to the equipment that can be used. Period information storage step for registering a period that is a unit of a period for creating a schedule,
Further comprising
The schedule creation program according to any one of claims 9 to 15, wherein the intermediate product information storage step and the schedule creation step have a schedule creation start time as a time when the period starts. A schedule creation device for creating a production plan for orders and a replenishment plan for intermediate products using a calculation unit of a computer for a production line that manufactures products in a plurality of processes,
An order information storage unit for registering products, order quantities, and delivery times of orders;
A manufacturing route information storage unit for registering a manufacturing route that is a series of a plurality of processes for manufacturing a product for each product;
An equipment information storage unit for registering equipment that can be used in the process;
An allocation point determination unit that determines an allocation point that is a step of manufacturing an intermediate product that allocates the order based on the manufacturing route;
As an object to be allocated for each order, the order quantity of the order to be allocated is set to the intermediate product capable of allocating the order to be allocated, with an inventory quantity at the start of schedule creation as an upper limit. An order allocating section for allocating raw materials if there is no inventory amount of the intermediate product capable of allocating the order to be allocated;
As the allocation target for each intermediate product, the replenishment amount of the intermediate product that is the allocation target is added to the intermediate product that can allocate the intermediate product that is the allocation target. An intermediate product allocating unit that allocates to stock if there is no remaining inventory of the intermediate product that can be allocated as an upper limit and the intermediate product to be allocated can be allocated;
Based on the result of the intermediate product or raw material that reserves the order quantity of the order, the load of each process of the manufacturing route for manufacturing the order from the intermediate product or raw material is started at the facility that can be used at the start of scheduling Of the production route for producing the intermediate product from the intermediate product or the raw material based on the result of the intermediate product or the raw material allocated with the intermediate product in order, and creating a production plan. A schedule creation unit that assigns the load of each process to the equipment that can be used in order from the start of schedule creation, and creates a replenishment plan;
A schedule creation device characterized by comprising: The manufacturing route information storage unit
Further registering a variety that is a kind of raw material for producing the product,
The allocation point determination unit is
For each product type, when each process of the manufacturing route of the product is expressed by a tree structure with the same process as one node, a process that becomes a node branching to a plurality of branches is allocated and determined as a point. The schedule creation device according to claim 17. A process capacity information storage unit for registering the process capacity in each process for each product type;
Further comprising
The schedule creation unit
The schedule creation device according to claim 17 or 18, wherein the load is calculated based on the processing capability. The manufacturing route information storage unit
For each process of the manufacturing route, further register an inter-process time that is a time that needs to be at least between the process and the previous process,
The schedule creation device according to any one of claims 17 to 19, wherein the schedule creation unit assigns the load of each process to the equipment that can be used in consideration of the time between the processes. The order allocation unit includes:
Can be allocated to the order to be allocated as an intermediate product that can be allocated as an intermediate product that can be allocated to the intermediate product included in the manufacturing route of the product of the order that is the allocation target. All intermediate products are allocated in the order of the number of processes that have passed through, and when all the intermediate products that can be allocated are exhausted, the same raw material as the product type of the order product to be allocated is allocated. ,
The intermediate product allocation unit is
The intermediate products in the order of the number of processes that have passed are targeted for allocation, and the intermediate products that are included in the production route of the intermediate product that is the allocation target and pass until the intermediate products that are the allocation target are manufactured. As intermediate products that can be allocated to intermediate products that are included in the process to be allocated, the intermediate products that are allocated to the intermediate products that are to be allocated are allocated in the order of intermediate products that have been passed through the largest number of processes. 21. The schedule creation device according to claim 17, wherein when all the intermediate products that can be allocated disappear, the same raw material as the type of the intermediate product to be allocated is allocated. . An intermediate product information storage unit for storing an initial stock amount and a target stock amount, which are stock amounts of intermediate products at the allocation point at the start of schedule creation;
Further comprising
The intermediate product allocation unit is
The replenishment amount is calculated as a difference between a target stock amount of the intermediate product and a remaining stock amount after the intermediate product is allocated, 22. The method according to any one of claims 17 to 21, Schedule creation device. The intermediate product information storage unit further registers a delivery date for replenishment of the intermediate product,
The schedule creation unit is configured so that each process of the manufacturing route is performed in ascending order of a value obtained by dividing the number of days until the delivery date of the order or the intermediate product by the number of remaining processes necessary to manufacture the order or the intermediate product. The schedule creation device according to any one of claims 17 to 22, wherein a production plan or a replenishment plan is created by allocating the load to the equipment that can be used. Period information storage unit for registering a period that is a unit of a period for creating a schedule,
Further comprising
The schedule creation device according to any one of claims 17 to 23, wherein the intermediate product information storage unit and the schedule creation unit set a schedule creation start time as a time when the period starts.

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