WO2007060985A1

WO2007060985A1 - Production resource management system, evaluation value calculation method, and program

Info

Publication number: WO2007060985A1
Application number: PCT/JP2006/323307
Authority: WO
Inventors: Nobuya Fujita
Original assignee: Ns Solutions Corporation
Priority date: 2005-11-24
Filing date: 2006-11-22
Publication date: 2007-05-31
Also published as: JP4959577B2; MY149410A; CN101313260A; JPWO2007060985A1

Abstract

An evaluation value calculation unit (106) calculates an evaluation value relating to production of a product according to material stock period information indicating a period during which the material is in stock and production period information indicating a period from a production start of a product produced by the material to a shipment. The cost required for keeping the material in stock is converted as a lead time and it is possible to calculate an evaluation value reflecting the cost actually required for producing a product.

Description

Specification

Production resource management system, evaluation value calculation method and program

Technical field

[0001] The present invention relates to a production resource management system, an evaluation value calculation method, and a program for calculating an evaluation value related to manufacture of a product in consideration of inventory costs.

Background art

[0002] In general, in the manufacturing industry, when producing a product, a production plan is made so that the product can be supplied without excess or deficiency in the market. The production plan is created in consideration of the required time called lead time. For example, if a product is manufactured through three processes, it takes 9 days in total if process (1) takes 2 days, process (2) takes 2 days, and process (3) takes 4 days. . These 9 days are called production lead time for this product.

[0003] Furthermore, materials are required to manufacture products. The material means all parts, semi-finished products, products, etc. that are used as materials during manufacturing. For example, when you receive an order for a product, if you have all the materials, you can't start manufacturing. Therefore, it is necessary to consider procurement lead time in addition to manufacturing lead time. In the previous example, if material A is required in step (1) and it takes one day to order and deliver material A, as shown in Fig. 16, The total lead time is 1 day for procurement lead time + 10 days for production lead time 9 days. Of course, since it is necessary to consider the procurement lead time of all materials and parts required in steps (1) to (3), it will actually be 10 days or longer.

[0004] In the manufacturing industry, demand forecasts are made to reduce the excess and deficiency of product supply, and when to start making products to be shipped at a certain time, and when to procure materials, etc. The production plan is set based on the procurement lead time and manufacturing lead time. By manufacturing products based on this production plan, it is possible to suppress oversupply and shortage of products to the market.

Patent Document 1: Japanese Patent Laid-Open No. 5-181871

Patent Document 2: JP-A-8-190586 Disclosure of the invention

[0006] However, by setting the lead time based on the information on when to ship this product, it can contribute to the suppression of oversupply and shortage of products to the market. It is an idea. On the other hand, looking at the manufacturing process, it was difficult to calculate the costs actually incurred during manufacturing.

[0007] This is because, in the manufacturing industry, the idea of “total lead time = procurement lead time + production lead time” is based on the assumption that production starts as soon as materials are delivered. However, in reality, since there is no material, manufacturing cannot start, so it is safer to order materials early and have them in stock. As shown in Fig. 17, ideally, the necessary parts in a certain manufacturing process should be procured just before that. Procurement of materials first with an extra period is inevitably inevitable. Therefore, apart from reducing the excess and deficiency of product supply, the issue of controlling the cost of keeping materials in stock was very important for the manufacturing industry. However, until now it has been ineffective to calculate an evaluation value that reflects the cost of inventory.

[0008] In particular, if a plurality of materials are kept in stock in one process, the cost increases accordingly, which is an important management item.

[0009] Furthermore, depending on the manufacturing industry, a material called a semi-finished product is self-produced based on the procured material, and a final product is produced based on this semi-finished product. For example, in the steel industry, raw iron ore is procured to produce semi-finished products called slabs. Based on this slab, various final products including plate products are manufactured by rolling. For example, as shown in Fig. 18, after manufacturing a product using a part of slab 1, the remaining slab 2 is kept in stock and another product is manufactured using it. Done. In such a case, as mentioned above, many semi-finished products need to be manufactured and kept in stock so that various end product orders can be handled quickly. However, having a lot of inventory leads to high costs

[0010] In general, in order to reduce the manufacturing cost of products, the manufacturing industry has factories in areas where labor costs and land are cheap, and transports materials to factories where labor costs and land are cheap. Increasingly, cases of final product assembly or final processing are increasing. However, the above-mentioned factories tend to have a lot of safe inventory of parts, where the material transportation period and procurement period are often long. For this reason, it was impossible to calculate the actual costs that were incurred during production, reflecting the costs that were incurred for inventory. Therefore, it was hard to keep costs down. In particular, the products handled in the manufacturing industry have many parts and many inventories, leading to higher costs.

[0011] Further, when a plurality of factories are owned, it is a very important factor to determine at which factory the material is manufactured because it greatly affects the cost of the product. However, as described above, the factory may be determined in a state where the actual cost that reflects the cost of inventory cannot be calculated, and the manufacturing may continue with the increased cost. The conventional selection method will be described with reference to FIGS.

[0012] Figure 19 illustrates one conventional method of simply selecting a factory based on the speed at which the product is manufactured, and represents the delivery date of the product as 30 days. From this figure, we can see that the C-Factory and B-Factory are the factories that produce products in time for delivery. And because C-Factory can be manufactured in the shortest time, it was decided that C Factory was a factory for manufacturing products.

[0013] However, in the manufacturing industry, it is necessary to consider the cost as described above as well as the need to manufacture a product quickly. Therefore, in Fig. 20, we will explain the conventional selection method that shows the material purchase cost of the product on the X axis.

[0014] Figure 20 shows that material purchase costs increase in the order of A—Factory, B—Factory, C—Factory. In other words, the factory that can meet the delivery date and reduce the material purchase cost,

B—It turns out to be a Factory. Therefore, B—Factory is determined as the factory that manufactures the product.

[0015] However, in the conventional method described above, the cost related to inventory, which is a problem of the present application, is not considered at all for each material. For example, in Fig. 20, the force B-Factory with B-Factory selected is in a remote area and it may be necessary to hold a large amount of inventory for manufacturing the product. In this case, B-Factory costs a lot of inventory, and if B-Factory is decided, the cost becomes enormous. Nevertheless, this has been considered in the past. There was no need to calculate the cost in consideration.

[0016] As described above, in the conventional manufacturing industry, production plans are made based on lead times in order to suppress oversupply and shortage of products to the market. It is desirable to regenerate the plan considering the inventory cost of materials and the like. Despite the conventional issues, there was no evaluation value for manufacturing products that considered inventory costs. Also, having raw materials and semi-finished products with high unit prices in stock is preferable from the perspective of cash flow and is not a thing!

[0017] Accordingly, an object of the present invention is to calculate an evaluation value related to manufacturing of a product in consideration of a period (inventory lead time) in which a material such as a semi-finished product stays in stock together with a manufacturing lead time.

[0018] The production resource management system of the present invention includes material stagnation period information indicating a period during which a material stays in stock, and a manufacturing start time of a product manufactured using the material, and a manufacturing period indicating a period until shipment. Evaluation value calculating means for calculating an evaluation value related to the manufacture of the product based on the period information is provided.

The evaluation value calculation method of the present invention is an evaluation value calculation method by a production resource management system, and is a material stay period information indicating a period during which a material stays in stock, and a production start time of a product manufactured by the material. And an evaluation value calculating step for calculating an evaluation value related to the manufacture of the product based on manufacturing period information indicating a period from the time of shipment to the time of shipment.

The program of the present invention is based on the material stay period information indicating the period during which the material stays in stock, and the production period information indicating the period from the start of manufacture to the shipment of the product manufactured by the material. It is characterized by causing a computer to execute an evaluation value calculating step for calculating an evaluation value related to manufacture of a product.

[0019] In the present invention, based on the material stay period information indicating the period during which the material stays in stock, and the production period information indicating the period up to the time of shipment of the product, the evaluation related to the manufacture of the product It is configured to calculate a value. Therefore, according to the present invention, it is possible to calculate the evaluation value reflecting the cost actually generated when the product is manufactured by converting the cost required for inventory as the lead time. Brief Description of Drawings

FIG. 1 is a block diagram showing a functional configuration of a production resource management system according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing an example of a table in the material DB.

FIG. 3 is a diagram schematically showing an example of a table in the production management DB.

FIG. 4 is a block diagram showing a hardware configuration of the production resource management system.

FIG. 5 is a flowchart showing information registration processing in the material DB.

FIG. 6 is a flowchart showing information registration processing in the production management DB.

[FIG. 7] FIG. 7 is a flowchart showing a material stay period, a product manufacturing period, an evaluation value calculation process, and the like.

FIG. 8 is a diagram for specifically explaining an evaluation value calculation method in the embodiment of the present invention.

FIG. 9 is a diagram for specifically explaining an evaluation value calculation method according to the embodiment of the present invention.

FIG. 10 is a diagram for explaining a specific example of an evaluation value calculation method according to another embodiment of the present invention.

FIG. 11 is a diagram for explaining a specific example of an evaluation value calculation method according to another embodiment of the present invention.

FIG. 12 is a diagram for explaining weighting of evaluation values by a weighting unit.

[FIG. 13] FIG. 13 is a diagram for explaining a method of selecting a factory for manufacturing a product at a reduced cost by using an evaluation value.

FIG. 14 is a bubble chart expressing the amount of material that can be supplied.

FIG. 15 is a flowchart showing a weighting index calculation process by a weighting unit.

[FIG. 16] FIG. 16 is a diagram for explaining a lead time including a procurement lead time and a manufacturing lead time.

[FIG. 17] FIG. 17 is a diagram for explaining how the conventional procurement lead time and manufacturing lead time are taken. [FIG. 18] FIG. 18 is a diagram for explaining that there is one need to store slabs in stock when manufacturing semi-finished slab power products.

[FIG. 19] FIG. 19 is a diagram for explaining a conventional method of simply selecting a factory based on the speed at which products are manufactured.

[FIG. 20] FIG. 20 is a diagram for explaining a conventional selection method in which the material purchase cost of a product is represented on the X axis.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments to which the present invention is applied will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a functional configuration of the production resource management system according to the embodiment of the present invention. In FIG. 1, the production resource management system 100 includes a material management unit 101, a material DB (database) 102, a production management unit 103, a production management DB (database) 104, a material inventory period information calculation unit 105, and a production period information calculation unit 109. The evaluation value calculation unit 106, the output control unit 107, the output unit 108, and the input unit 110 are included.

[0023] The material management unit 101 performs the material ordering process by transmitting the ordering information of the material etc. to the external terminal of the ordering party, and when the material is received, the information on the arrival of the material Is entered. The material arrival information includes the material ID, which is identification information of the material received, and the arrival date of the material. When the arrival information is input, the material management unit 101 registers the material ID and the arrival date of the material included in the arrival information in the material DB 102. On the other hand, when the material for which the above arrival information is registered in the material DB102 is used at the time of product manufacture, the material ID and the stock quantity after use are input to the material management unit 101 as inventory information, and the material The management unit 101 registers the stock quantity in the material DB 102 in association with the corresponding material.

[0024] The production management unit 103 inputs production plan information indicating a product production plan and product information indicating a material used for the product. The production plan information includes an order ID, which is product order identification information, and a product ID of the product for which the order has been placed. Product information includes the material ID of the material used to manufacture the product. When the production plan information is input, the production management unit 103 registers the order ID and product ID included in the production plan information in the production management DB 104, and when the product information is input, the material included in the product information. ID production management DB104 Register with. On the other hand, when production of a product whose production plan information and product information are registered in the production management DB 104 is started, the product ID, order ID, and start date are input to the production management unit 103 as start date information. The production management unit 103 registers the start date in the production management DB 104 in association with the corresponding product. In addition, when the material ID registered in the product information is used during the manufacture of the product for which the production plan information and product information are registered in the product management DB 104, the product ID, order, material ID and use date are used. Information is input to the production management unit 103, and the production management unit 103 registers the use date in the production management DB 104 in association with the corresponding material. Further, when a product having the production plan information and product information registered in the production management DB 104 is shipped, the product ID, order ID, and shipping date are input to the production management unit 103 as shipping information, and the production management unit 103 Registers the shipping date in the production management DB 104 in association with the corresponding product.

[0025] Here, a table configuration in the material DB 102 will be described with a specific example. FIG. 2 is a diagram schematically showing an example of a table in the material DB 102. In Fig. 2, the material DB 102 has a material ID registration field, an arrival date registration field, and an inventory quantity registration field for each record. For example, in the uppermost record in Fig. 2, information on the part ID "123" is registered, the part ID "123" is entered in the part ID registration field, and the arrival date of the part is entered in the arrival date registration field. In the “10Zl” and the inventory quantity registration field, the inventory quantity “100” of the part after the part is used for product manufacture is registered.

Next, the table configuration in the production management DB 104 will be described with a specific example. FIG. 3 is a diagram schematically showing an example of a table in the production management DB 104. In Fig. 3, the production management DB 104 has an order ID registration field, a product ID registration field, a start date registration field, a shipping date registration field, and a material ID registration field (in Fig. 3, material ID1 registration field to material ID3 registration). Field only) and usage date registration fields (in FIG. 3, only usage date 1 registration field to usage date 3 registration field are shown) are provided for each record.

[0027] For example, information on the order ID "abc" is registered in the uppermost record in FIG. 3, the order ID "abc" is registered in the order ID registration field, and the information in the product ID registration field. Product ID "28" of the product requested to be manufactured by order, the product in the start date registration field “10Z20”, the date of actual manufacture of the product, “12Zl”, the date of actual shipment of the product in the shipping date registration field, and the material ID1 registration field to the material ID3 registration field in the shipping date registration field. Used material IDs “123”, “110”, “092”, use date 1 registration field to use date 3 In the registration field, the material ID “123”, “110”, “092” is entered when the product is manufactured. Each day used "10Z21", "10/20", "10/22" is registered.

[0028] Returning to the description of FIG. Based on the arrival date registered in the arrival date registration field in the material DB 102 and the use date registered in the use date registration feed in the production management DB 104, the material inventory period information calculation unit 105 stores the corresponding material in stock. Calculate the period of stay (stay period) in the warehouse. That is, the material inventory period information calculation unit 105 acquires a record corresponding to each material of the product designated as the evaluation value calculation target by the user from the material DB 102 and the production management DB 104, and stores the records in the acquired material records. Referring to the arrival date registration field and the use date registration field, the number of days from the arrival date to the use date is calculated for each material as the stay period of the material.

[0029] The production period information calculation unit 109 is based on the start date registered in the start date registration field in the production management DB 104 and the shipment date registered in the shipment date registration field in the production management DB 104. Calculate the production period of the corresponding product. That is, the manufacturing period information calculation unit 109 acquires a record corresponding to the product designated as the evaluation value calculation target by the user from the production management DB 104, and sets the start date registration field and the shipment date registration in the acquired record. Referring to the field, calculate the production period of the product from the start date to the shipment date.

[0030] The evaluation value calculation unit 106 adds the stay period of the stock of each material calculated by the material inventory period information calculation unit 105 and the product manufacturing period calculated by the manufacturing period information calculation unit 109. An evaluation value related to the manufacture of the product is calculated.

The output control unit 107 causes the output unit 108 to output the evaluation value calculated by the evaluation value calculation unit 106 and notifies the user.

[0032] The input unit 110 has a configuration corresponding to a keyboard controller 210, a keyboard 211, and the like, which will be described later, and can receive an instruction input according to an operation by a user. FIG. 4 is a block diagram showing a hardware configuration of the production resource management system 100. The CPU 201 comprehensively controls the controllers connected to the system bus. The ROM 203 or HD 207 stores a BIOS (Basic Input / Output System), an operating system program, which is a control program for the CPU 201, and the processing programs shown in FIGS. 5 to 7 executed by the production resource management system 100, for example. ing.

Note that in the example of FIG. 4, the hard disk (HD) 207 has a configuration arranged inside the production resource management system 100. In another embodiment, the configuration equivalent to the HD 207 is the production resource management system 100. It is good also as a structure arrange | positioned outside. Further, for example, the program for performing the processing shown in FIGS. 5 to 7 according to the present embodiment is recorded on a computer-readable recording medium such as a flexible disk (FD) 206 and a CD-ROM, and the program is executed. It can be configured to supply recording medium power, or it can be supplied via communication media such as the Internet.

The RAM 202 functions as a main memory, work area, etc. for the CPU 201. The CPU 201 implements various operations by loading a program necessary for execution of processing into the RAM 202 and executing the program.

The disk controller 205 controls access to external memories such as the HD 207 and the FD 206. The communication IF controller 204 is connected to the Internet or a LAN, and controls communication with the outside by, for example, TCP / IP.

The display controller 208 controls image display on the display 209.

The KB (keyboard) controller 210 receives an operation input from the keyboard (KB) 211 and transmits it to the CPU 201. Although not shown, in addition to the keyboard 211, a pointing device such as a mouse can also be applied to the production resource management system 100 according to the present embodiment as a user operation means.

[0039] The arrival information, inventory information, product information, production plan information, shipping information, use date information and start date information shown in FIG. 1 are produced by the user's operation on the operation means such as the input unit 110. It may be input to the resource management system 100, or may be input to the production resource management system 100 from another device under the control of the communication IF controller 204 via a communication line such as the Internet or LAN. [0040] The material management unit 101, the production management unit 103, the material inventory period information calculation unit 105, the production period information calculation unit 109, and the evaluation value calculation unit 106 are stored in, for example, the HD 207 and loaded into the RAM 202 as necessary. The configuration corresponds to the program to be executed and the CPU 201 that executes the program.

[0041] The material DB 102 and the production management DB 104 have a configuration corresponding to a part of the storage area in the HD 207, for example. The output control unit 107 has a configuration corresponding to, for example, the display controller 208, and the output unit 108 has a configuration corresponding to, for example, the display 209.

Next, the operation of the production resource management system 100 according to the present embodiment will be described with reference to FIGS. Fig. 5 is a flowchart showing the information registration process in the material DB102. FIG. 6 is a flowchart showing information registration processing in the production management DB 104. FIG. 7 is a flowchart showing the material stay period, product manufacturing period, evaluation value calculation processing, and the like.

First, the information registration processing in the material DB 102 by the material management unit 101 will be described with reference to FIG. In FIG. 5, when a material is received, the material management unit 101 receives the material arrival information (step S501). Subsequently, the material management unit 101 registers arrival information (material ID and arrival date) in the material DB 102 (step S502).

[0044] On the other hand, when the material for which the arrival information is registered in the material DB 102 is used at the time of manufacturing the product, the inventory information (the material ID and the inventory amount after using the material) is input to the material management unit 101. (Step S503), the material management unit 101 registers the stock quantity in the material DB 102 in the record registered in Step S502 corresponding to the input material ID (Step S504).

Next, the information registration processing in the production management DB 104 by the production management unit 103 will be described with reference to FIG. In FIG. 6, when the production plan information and product information are input (step S601), the production management unit 103 inputs the production plan information (order ID, product ID), product information (material used for the product). ID) is registered in the production management DB 104 (step S60 2).

[0046] On the other hand, when the manufacture of the product registered in the production management DB 104 is started and the start date information (product ID, order ID, start date) of the product is input to the production management unit 103 (STEP The production management unit 103 registers the start date in the record corresponding to the product registered in step S602 corresponding to the input product ID and order ID (step S604).

[0047] In addition, the material is used when manufacturing the product registered in the production management DB 104, and the date of use (product ID, order ID, material ID, date of use) of the product is used for production management. When entered in the part 103 (step S607), the production management part 103 registers the use date in the record corresponding to the product registered in step S602 corresponding to the entered product ID, order ID and material ID. (Step S608).

[0048] Further, when the product registered in the production management DB 104 is shipped and the shipping information (product ID, order ID, shipping date) of the product is input to the production management unit 103 (step S605), The production management unit 103 registers the shipping date in the record corresponding to the product registered in step S602 corresponding to the input product ID and order ID (step S606).

[0049] Next, the calculation process of the stay period information of material stock, the calculation process of the product manufacturing period, and the evaluation value calculation process will be described with reference to FIG.

[0050] First, the user inputs the product ID and order ID of the product whose evaluation value is to be calculated (step S701). The manufacturing period information calculation unit 109 obtains a record corresponding to the input product ID and order ID from the production management DB 104 (step S702), and registers the shipping date from the start date registered in the start date registration field in the record. The production period information up to the shipping date registered in the field is calculated (step S703).

[0051] Subsequently, the material inventory period information calculation unit 105 refers to the used material ID registration record in the record acquired in step S702, and selects a record corresponding to the material ID registered in the used material ID registration record. Obtained from the material DB102 (step S704). Next, the material inventory period information calculation unit 105 calculates the stay period information for each material from the arrival date registered in the arrival date registration field in each acquired record to the usage date registered in the usage date registration field for each material. (Step S705).

[0052] Subsequently, the evaluation value calculating unit 106 adds the product manufacturing period information calculated by the manufacturing period information calculating unit 109 and the stay period information of each material calculated by the material inventory period information calculating unit 105. Thus, the evaluation value related to the manufacture of the product is calculated (step S706). Subsequently, the output control unit 107 causes the output unit 108 to output the evaluation value calculated by the evaluation value calculation unit 106, and notifies the user (step S707).

Next, the evaluation value calculated by the above-described configuration and operation will be described with a specific example. 8 and 9 are diagrams for specifically explaining the evaluation value calculation method in the present embodiment. In the figure, processes A, B, and C are product manufacturing processes using materials a, b, and c, respectively.

First, the example shown in FIG. 8 will be described. Since the arrival date of the material a is “10Z2” and the usage date is “10/6”, the material inventory period information calculation unit 105 calculates the stay period of the material a as “4 days”. Since the arrival date of the material b is “10/1” and the usage date is “10/11”, the material inventory period information calculation unit 105 calculates the stay period of the material b as “10 days”. Since the arrival date of the material c is “10Z2” and the usage date is “10Z14”, the material inventory period information calculation unit 105 calculates the stay period of the material c as “12 days”. Further, since the start date of product manufacture is “10/6” and the shipping date is “10Z17”, the manufacturing period information calculation unit 109 calculates the manufacturing period of the product as “11 days”. Therefore, the evaluation value is calculated as follows by the evaluation value calculation unit 106.

"4 days" + "10 days" + "12 days" + "11 days" = "37 days (value)"

Next, the example shown in FIG. 9 will be described. Since the arrival date of the material a is “10Z2” and the usage date is “10/6”, the material inventory period information calculation unit 105 calculates the stay period of the material a as “4 days”. Since the arrival date of the material b is “10/5” and the use date is “10/11”, the material inventory period information calculation unit 105 calculates the stay period of the material b as “6 days”. Since the arrival date of the material c is “10Z2” and the usage date is “10Z14”, the material inventory period information calculation unit 105 calculates the stay period of the material c as “2 days”. In addition, since the start date of product manufacture is “10/6 and the shipping date is“ 10Z17 ”, the manufacturing period information calculation unit 109 calculates the manufacturing period of the product as“ 11 days. ”Therefore, the evaluation value is calculated. The evaluation value is calculated by section 106 as follows.

"4 days" + "6 days" + "12 days" + "11 days" = "33 days (value)"

As described above, specific examples of the evaluation value calculation method have been described for the examples shown in FIGS. 8 and 9. In both the examples of FIGS. 8 and 9, the manufacturing period is the same as “11 days”. The example shown in Since the stay period of materials b and materials c in stock is long, a higher evaluation value than the example in Fig. 9 is calculated, and the inventory cost is reflected in the evaluation value. In this way, even if the product manufacturing period is the same, if material b and material c are kept in stock for a long time and the inventory cost is high, the evaluation value will be high, and the example in Figure 9 In comparison, it can be seen that the example in Fig. 8 is not preferable in terms of cost.

[0058] As described above, according to this embodiment, the period from the date of product manufacture to the date of shipment (manufacturing lead time) and the period from the date of arrival of materials to the date of use (stock lead time) are considered. It is possible to calculate the evaluated value. Therefore, the user can grasp the overall cost evaluation for product production based on the inventory cost by referring to the evaluation value.

Next, another embodiment of the present invention will be described. In the present embodiment, it is possible to calculate an evaluation value that takes into account the inventory cost until all the materials necessary for the product manufacturing process are used up. As a result, as shown in Fig. 18, when a certain product is manufactured by repeating the process using semi-finished products, the inventory generated in the slab 2 and slab 3 stages is also reflected as a cost. Thus, the evaluation value can be calculated.

[0060] In this method, a period from when a material is received until the end of the manufacturing process in which the material is used is treated as a material stay period. FIG. 10 is a diagram for explaining a specific example of the evaluation value calculation method according to another embodiment of the present invention.

For example, as shown in FIG. 10, when the arrival date of the material a is “10Z2” and the end point of the process A in which the material a is used is “10Z11”, the material inventory period information calculation unit 105 The stay period for material a is calculated as “9 days”. Since the arrival date of the material b is “10/1” and the end point of the process B in which the material b is used is “10Z14”, the material inventory period information calculation unit 1 05 determines the stay period for the material b. Calculated as “13 days”. In addition, since the arrival date of the material c is 10 Z2 "and the end point of the process C in which the material c is used is" 10Z17 ", the material inventory period information calculation unit 105 sets the stay period for the material c to" “15 days”, and since the manufacturing start date of the product is “10Z6” and the shipping date is “10Z17”, the manufacturing period information calculation unit 109 sets the manufacturing period of the product to “11 days”. Therefore, the evaluation value is calculated as follows by the evaluation value calculation unit 106. "9 days" + "13 days" + "15 days" + "11 days" = "48 days (evaluation value)"

As described above, in this embodiment, it is possible to calculate an evaluation value that uses all necessary materials in the manufacturing process of the product and takes into account the inventory cost until cutting.

[0063] Next, another embodiment of the present invention will be described. In this embodiment, it is possible to calculate an evaluation value that takes into account inventory costs when a product is manufactured by combining a plurality of materials in each step.

[0065] For example, as shown in Fig. 11, the arrival date of material a is "10Zl", the arrival date force of material b is 10 3 ", and the use date of process A in which materials a and b are used is" 10Z8 " In this case, the material inventory period information calculation unit 105 calculates the stay period for material a as “7 days” and the stay period as for material b as “5 days.” Material C is added to the product manufactured in process A. In the combination process B, when the arrival date of the material c is “10Z3” and the process date where the material c is used is “10Z10”, the material inventory period information calculation unit 105 determines the stay period for the material a. Similarly, when the arrival date of the material d is “10Z3” and the daily use force of the process C where the material d is used is “10 Z12”, the material inventory period information calculation unit 105 The length of stay for material d is calculated as “9 days”. Further, since the production start date of the product is “10Z8” and the shipping date is “10Z15”, the production period information calculation unit 109 calculates the production period of the product as “7 days”. Accordingly, the evaluation value is calculated by the evaluation value calculation unit 106 as follows.

"7 days" + "5 days" + "7 days" + "9 days" + "7 days" = "35 days (value)"

As described above, in this embodiment, even when a product is completed through a manufacturing process in which a plurality of materials of the product are combined, it is possible to calculate an evaluation value in consideration of inventory costs.

In the present embodiment, as described above, the evaluation value calculation unit 106 includes the stay period of each material calculated by the material inventory period information calculation unit 105 and the product period calculated by the manufacturing period information calculation unit 109. An evaluation value related to the manufacture of the product is calculated from the manufacturing period. In another embodiment, at least one of the material inventory period information calculation unit 105 and the production period information calculation unit 109 is connected to the production resource management system 100 and a communication circuit such as the Internet. It can also be provided in an external device connected via a line. In this case, the production resource management system 100 acquires at least one of the stay period of each material and the production period of the product calculated by the external device, and the evaluation value calculation unit 106 evaluates the production of the product. Calculate the value. In addition, when the residence period of each material is obtained from an external device, the material inventory period information calculation unit 105 is not required from the production resource management system, and when the external device force production period is obtained, it is obtained from the production resource management system. The manufacturing period information calculation unit 109 becomes unnecessary.

[0068] As yet another embodiment, at least one of the stay period of each material and the production period of the product is input via the input unit 110 by the user's operation, and is stored in the RAM 202 in FIG. It is also possible for the value calculation unit 106 to calculate the evaluation value related to the manufacture of the product using the stay period of each material held in the RAM 202 and the manufacture period of the product. In this case, the material inventory period information calculation unit 105 is not required from the production resource management system when the stay period is input, and the production period information calculation unit 109 is not required from the production resource management system when the production period is input. It becomes.

[0069] As yet another embodiment, a weighting unit may be provided that calculates an index value that takes into account the influence of material stock on product manufacturing. As the weighting by the weighting unit, weighting according to the unit price of materials and the inventory price per unit quantity of materials can be considered. The inventory price is a value that evaluates the cost of the inventory stay period and the degree of influence of inventory on the business. For example, even if the inventory period is 10 days, there are very high demand, high price, and materials that care about the storage location, and materials that are very low demand, inexpensive, and have no storage location specified. Different assessments should be made for the cost of inventory management. The weighting unit is a function that takes these into consideration and reflects them in the evaluation value.

The weighting of the evaluation value by the weighting unit will be described with reference to FIG. The weighting may be the unit price at the time of procurement of materials, exchange rate, service life, high or low demand. Figure 12 shows the weighting DB 112 used for this weighting. The weighting DB 112 has a weighting ID, material ID, procurement unit price, exchange rate at the time of procurement, and life span for each record. For example, information on the weight ID “001” is registered in the uppermost record in FIG. 12. The weight ID “001” is registered in the weight ID registration field, and the material ID is registered in the material ID registration field. Price ID "125", procurement unit price field is the material price at the time of procurement "1.5 dollars", exchange rate field at the time of procurement is the exchange rate at the time of procurement "100 yen Z dollars", and the material for the lifetime registration field The lifetime of "15 months" is registered. The weighting DB 112 is configured to correspond to a part of the storage area in the HD 207, like the material DB 102 and the like.

[0071] As described above, the values set in the fields of Fig. 12 are multiplied and handled as a weighting index. For example, assume that the material inventory period of the material with weight ID “001” and material ID “125” is 20 days. From Fig. 12, the weighting index in this case = "unit price 1.5" X "exchange at the time of procurement 100" X "lZ life 15 months" = 10. Therefore, it is calculated as material inventory period = 20 × 10 = 200 days. Similarly, when the weighting index of weighting ID002 and material ID123 is calculated from FIG. 12, “10” X “120” X “1/1” = 1200. Therefore, material inventory period = 20 x 1200 = 24000 days.

A flow of calculating the weighting index by the weighting unit will be described with reference to FIG. For example, as illustrated in FIG. 15, the record associated with the material ID held in step 704 is acquired from the weighting DB 112 (step 1501). Processing is performed based on a predetermined calculation formula (in the above example, multiplication formula) using each field of the record, and a weighting index is calculated (step 1502). Then, an evaluation value reflecting the weighting index is calculated using the calculated weighting index and the material inventory period (step 1503).

The specific examples of the weighting index value and the material inventory period calculation method reflecting the weighting index value have been described above with reference to FIGS. 12 and 15. Both materials have the same number of days as “material inventory period = 20 days”. “Weighting ID = 002” is a material that is not desirable to have as a stock in terms of cost. Compared to materials with “Weighting ID = 001” Indicators and evaluation values are calculated at a high level. That is, it is reflected in the index and the evaluation value.

As described above, according to the present embodiment, it is possible to calculate an evaluation value in consideration of the influence of having a material as an inventory on the cost side. Therefore, the user can grasp the exact cost evaluation based on the property of each material by referring to this index and evaluation value.

[0075] Needless to say, an index can be expressed not only by multiplying each field but also by addition, subtraction, and division. For example, as mentioned above, materials with shorter life spans are kept in stock. Things have a negative impact on costs. In such a case, for example, by registering the life registration field for registering the life in the weighting DB 112 and dividing the calculated weighting index by the life registration field, the evaluation index value of the material inventory considering the life is calculated. .

In the above-described embodiment, the number of days is used as the unit of the evaluation value. However, the present invention is not limited to this, and the unit of month, week, time, etc. may be used, or a value obtained by converting those values. May be used.

In the above-described embodiment, the calculation of the evaluation value in consideration of the inventory period of the product manufactured in various processes and the evaluation value in consideration of the property of the stock of the material used for manufacturing has been described. Next, Using this evaluation value, a method for selecting a factory for manufacturing products at a reduced cost will be described with reference to FIG. As mentioned above, determining the power at which a material is manufactured in a factory is a very important issue because it greatly affects the cost of the product.

FIG. 13 differs from the conventional method (FIGS. 16 and 17) in that the material inventory period is combined with the material purchase cost. In this way, the construction schedule is different from the method of simply comparing the material purchase costs, and the cost of inventory is also taken into consideration, so it is necessary to select a factory that can manufacture products while suppressing the costs actually incurred during production. Is possible. This will be explained using Fig. 13. The material purchase cost is the consideration paid when the material is purchased.

[0079] In FIG. 13, the combination of material cost and material inventory period increases in the order of A—Factory, C—Factory, B—Factory. In other words, if the delivery date is 30 days, as in Fig. 17, it can be seen that the factory that manufactures products that meet the deadline and reduce material purchase costs is C Factory. This is because the cost generated at the time of manufacturing for each material is taken into account using the evaluation value. In this way, this embodiment presents information that cannot be grasped by simply comparing the material purchase costs as shown in Fig. 17, so it is possible to select a factory that actually manufactures products at a reduced cost during manufacturing. Thus, the problem of the present application can be solved.

[0080] In addition, when the material inventory period is calculated using the weighting unit as described above, it is not limited to the combination with the material purchase cost described above, and it is possible to make other factory selections suitable for the situation. Become. For example, when using foreign exchange, it is necessary to indicate which of several factories overseas can produce valuable products and products with reduced costs. Is possible.

[0081] In addition, since the value of a product varies depending on the situation of the time, if the product has no value at the time of completion of manufacture, even if it can be manufactured at low cost, there is no meaning. For example, Figure 13 clearly shows that C Factory should be selected if the delivery date is 10 days or less, and A—Factory should be selected if the delivery date is 40 days or more. . Therefore, by using the material inventory period as shown in Fig. 13, it is possible to select a factory that realizes production of valuable products and products with reduced costs. This can reduce the production of unnecessary products and the costs associated with them.

Further, in FIG. 14, the amount of material that can be supplied can be represented by a bubble chart. As a result, it is possible to present the amount of material that can be supplied by the factory, so it is possible to present a factory that can supply the necessary amount during manufacturing. Therefore, it is possible to select a factory that manufactures products at a reduced cost, reflecting the situation more accurately, taking into account that the required amount can be secured.

Industrial applicability

[0083] According to the present invention, it is possible to calculate the evaluation value that reflects the cost actually generated during the manufacture of the product by converting the cost required for inventory as the lead time.

Claims

The scope of the claims

[1] Manufacture of the product based on the material stay period information that indicates the period during which the material stays in stock, and the manufacturing time information that indicates the period until the time of shipment of the product manufactured by the material A production resource management system characterized by comprising an evaluation value calculation means for calculating an evaluation value related to the above.

[2] The production according to claim 1, wherein the material stay period information is information indicating a period from a time when the material is received to a time when the material is used for manufacturing the product. Resource management system.

[3] The production according to claim 1, wherein the material stay period information is information indicating a period from the time when the material is received until the end of the manufacturing process in which the material is used. Resource management system.

[4] The production resource management system according to claim 1, wherein the evaluation value calculation means calculates the evaluation value by adding the material stay period information and the manufacturing period information. .

[5] It further comprises weighting means for weighting the material stay period information corresponding to the material,

2. The evaluation value calculation unit according to claim 1, wherein the evaluation value calculation unit calculates the evaluation value based on the material stay period information weighted by the weighting unit and the manufacturing period information. Production resource management system.

6. The production resource management system according to claim 5, wherein the weighting unit performs weighting according to a unit price of the material.

7. The production resource management system according to claim 5, wherein the weighting means performs weighting according to an inventory price per unit quantity of the material.

[8] An evaluation value calculation method by a production resource management system,

An evaluation value related to the manufacture of the product based on the material stay period information indicating the period during which the material stays in stock and the manufacturing period information indicating the period from the start of manufacture of the product manufactured by the material to the time of shipment. The evaluation value calculation method characterized by including the evaluation value calculation step which calculates. An evaluation value related to the manufacture of the product based on the material stay period information indicating the period during which the material stays in stock and the manufacturing period information indicating the period from the start of manufacture of the product manufactured by the material to the time of shipment. A program for causing a computer to execute an evaluation value calculating step for calculating.