JP7133493B2 - Production/transportation planning system and production/transportation planning method - Google Patents

Description

The present invention relates to a production/transportation planning system.

In the conventional transportation planning business, the production plan and the transportation distribution plan are optimized separately, and after the production plan is generated, the transportation distribution plan is generated in accordance with the production plan.

As background arts in this technical field, there are the following prior arts. In Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-164501), an order information input unit that receives input of order quantity and delivery date of products to be transported to the demand area, and a product transport based on the transport plan When the number of products at the place of demand on the delivery date falls below or exceeds a predetermined standard, a transportation plan change department that changes the transportation plan of the product, the production volume of the product based on the production plan, the amount of orders received, and a production plan changing unit for changing the production plan of the product when the number of products at a certain point in the supply chain falls below or exceeds a predetermined standard based on the inventory amount. (see summary).

In addition, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2015-60566), a reading unit that reads a work plan, switching cost information, and additional work information, and a section between works assigned to the work subject a graph network creation unit that creates a graph network by setting a section vertex, connecting an input vertex, a section vertex, and an exit vertex with an edge, and setting a weight variable to the edge to create a graph network; a route selection unit that selects a route based on the total sum of edge weights of each route; and a work plan that exchanges work between the work subjects according to the selected route and allocates the additional work to the section created by the exchange. A work plan scheduling apparatus is described (see abstract).

In addition, Patent Document 3 (Japanese Unexamined Patent Application Publication No. 2012-238301) describes a terminal of a primary procurement company that orders products in response to instructions from a client company, and a plurality of suppliers that ship products according to the orders. The terminal of the company, the terminal of the delivery agent company that acts as a proxy for the delivery of the products shipped from the supplier company to the client company, and the server device are connected via a communication network, and the product is ordered and delivered. A product ordering support device is described that processes information so that the progress of product delivery can be grasped in real time (see abstract).

JP 2014-164501 A JP 2015-60566 A JP 2012-238301 A

Generally, there is a trade-off relationship between production costs and transportation costs. That is, if the number of setup changes in the production equipment is reduced, the setup change cost will be reduced, but the production lot will be larger, and the number of items that can be produced will be reduced. Since only the required quantity is transported to the place of demand, when many items are sold in small quantities, a small number of items are transported in small quantities in one transport. For this reason, the loading rate tends to decrease. Therefore, the conventional method of generating a transportation plan after generating a production plan may not be able to obtain an optimal plan as a whole.

In Patent Document 1 mentioned above, a physical distribution simulation is executed for a given production plan and transportation plan. Moreover, in Patent Literature 2, the setup change is optimized. Moreover, in Patent Document 3, the transportation frequency is calculated after the transportation amount is determined. In this way, the known technology does not consider a plan that integrates the production plan and the transportation plan. In addition, even if a simulation is performed by combining well-known technologies and combining an individually optimized production plan (changeover) and a transportation plan, the plan that minimizes the total cost of changeover loss cost, transportation cost, and inventory cost is found. cannot be generated.

An object of the present invention is to create a plan that minimizes the total cost of changeover loss costs, transportation costs, and inventory costs by integrating production planning and transportation planning.

A representative example of the invention disclosed in the present application is as follows. That is, the production/transportation planning system comprises an arithmetic device that executes a predetermined process and a memory that can be accessed by the arithmetic device . A plurality of production plans for the products are generated so that the requested amount can be delivered by the requested date, and the products produced according to the generated production plans arrive at the destination by the requested date. Generate a plurality of transportation plans for the product as follows, calculate the transportation cost using the transportation rate in the generated transportation plan, and multiply the inventory quantity and inventory unit price according to the generated production plan and transportation plan. calculating the inventory cost, adding the calculated transportation cost, loss cost and inventory cost to calculate a plurality of total costs, and calculating the minimum total cost among the calculated plurality of total costs and a transport plan combination, wherein the arithmetic unit selects the earliest departure date, and the shipping date determined by the production plan is selected from the previous departure date to the selected departure date Determine the transportation rate by multiplying the container occupancy rate and the shipment volume of the items between , to calculate transportation costs .

According to one aspect of the present invention, the production plan and transportation plan are integrated into an optimized plan. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

It is a figure which shows the structure of a production and transportation planning system. 10 is a flowchart of production/transportation planning processing; It is a flow chart of transportation plan creation processing. It is a figure which shows the structural example of request|requirement amount information. It is a figure which shows the structural example of item information. It is a figure which shows the structural example of inventory unit price information. It is a figure which shows the structural example of transportation calendar information. It is a figure which shows the structural example of equipment calendar information. It is a figure which shows the structural example of production information. It is a figure which shows the structural example of setup change information. FIG. 4 is a diagram showing a configuration example of scenario information; It is a figure which shows the structural example of production planning information. It is a figure which shows the structural example of setup change plan information. 4 is a diagram showing a configuration example of transportation item planning information; FIG. It is a figure which shows the structural example of transportation cost information. It is a figure which shows the structural example of inventory information. It is a figure which shows the structural example of cost information. FIG. 10 is a diagram showing an example of a scenario comparison screen; It is a figure which shows the structural example of a production and transportation planning screen.

<Example 1>
FIG. 1 is a diagram showing the configuration of a production/transportation planning system according to an embodiment of the present invention.

A production/transportation planning system 1 of the embodiment of the present invention is composed of a computer having a processor (CPU) 11, a communication interface 12, an input/output interface 13 and a memory 14. FIG. The processor 11, communication interface 12, input/output interface 13, and memory 14 are connected so as to be accessible by communication means such as a bus.

The processor 11 is an arithmetic device that executes programs stored in the memory 14 . Various functions of the production/transportation planning system 1 are realized by the processor 11 executing various programs. Note that part of the processing performed by the processor 11 by executing the program may be performed by another computing device (for example, a hardware FPGA or ASIC).

The memory 14 includes ROM, which is a non-volatile storage element, and RAM, which is a volatile storage device. The ROM stores immutable programs (eg, BIOS) and the like. RAM is a high-speed and volatile storage device such as DRAM (Dynamic Random Access Memory), and stores programs executed by the processor 11 and data used when the programs are executed (for example, data read from the storage device 2). Store temporarily. For example, the processor 11 executes a production plan/transportation plan generation program to configure the production plan/transportation plan generation unit 15 . The production plan/transportation plan generation unit 15 creates a production plan and a transportation plan, and calculates various costs according to the generated plans. Further, the screen generation unit 16 is configured by the processor 11 executing the screen generation program. The screen generation unit 16 generates data for displaying a screen on which the user can visually recognize the generated plan and the calculated cost.

The communication interface 12 is a network interface device that controls communication with other devices according to a predetermined protocol.

Output devices such as a display device 17 and a printer (not shown), and output devices such as a keyboard 18, a mouse (not shown), and a touch panel (not shown) are connected to the input/output interface 13 so that the execution results of the program can be displayed to the user. is an interface that outputs in a visible format and receives input from the user.

Programs executed by the processor 11 are provided to the server via removable media (CD-ROM, flash memory, etc.) or a network, and stored in the non-volatile memory 14 or auxiliary storage device, which are non-temporary storage media. Therefore, the production/transportation planning system 1 preferably has an interface for reading data from a network or removable media.

The production/transportation planning system 1 is a computer system configured on one physical computer or on a plurality of logically or physically configured computers, and is constructed on a plurality of physical computer resources. It may run on a virtual machine that has been installed.

A production/transportation planning system 1 is connected to a storage device 2 . The storage device 2 has a large-capacity, non-volatile storage device such as a magnetic storage device (HDD) or flash memory (SSD), and stores data used by the processor 11 when executing programs. For example, the storage device 2 stores requested quantity information 21, item information 22, inventory unit price information 23, transportation calendar information 24, facility calendar information 25, production information 26, which are data used by the production/transportation planning system 1 for arithmetic processing. Setup change information 27 and scenario information 28 are stored. The storage device 2 also stores production plan information 31, changeover plan information 32, transportation item plan information 33, transportation cost information 34, inventory information 35, and cost information 36 output by the production/transportation planning system 1 as a result of arithmetic processing. to store Details of the information stored in the storage device 2 will be described later with reference to FIGS. 4 to 17. FIG. Note that the storage device 2 may store programs executed by the processor 11 .

In the configuration shown in FIG. 1, the storage device 2 is provided separately from the production/transportation planning system 1, but an auxiliary storage device, which is a non-volatile storage device for storing data, may be provided within the production/transportation planning system 1. .

The production/transportation planning system 1 may be connected to other systems (for example, a customer POS system 3, a factory production control system 4, a transport control system 5, and an inventory control system 6) via a communication interface 12. . The customer POS system 3 is a system for managing product sales at the store, and is also used by the store for ordering products. The factory production control system 4 is a system for managing production of products in factories. The transportation management system 5 is a system for a transportation company (for example, a shipping company) to manage the operation of means of transportation. The inventory management system 6 is a system for managing inventory stored in factories and warehouses.

The production/transportation planning system 1 is a system for distributors and wholesalers to manage the distribution of products. , is a computer system that creates a transportation plan for transporting manufactured products from factories to dealers.

FIG. 2 is a flow chart of production/transport planning processing.

First, the production plan/transportation plan generator 15 selects one scenario (101). Scenario selection can be done in a variety of ways, including:
(1) One scenario may be selected from the scenario information 28 . For example, all scenarios used in the past may be used.
(2) A plurality of child scenarios may be generated by changing the production order of products from the default order within the scenario defined in the scenario information 28, and the generated child scenarios may be selected one by one. In general, changeover costs and loads (production stoppage time) differ depending on the item before and after the changeover, so the production cost can be reduced by a scenario in which the production order is changed.
(3) Scenarios may be generated according to predetermined rules, and the generated scenarios may be selected one by one. By generating a scenario without using the scenario information 28 in this way, it is possible to generate a production plan and a transportation plan without determining the scenario information 28 in advance.

Next, the production plan/transportation plan generator 15 creates a production plan according to the selected scenario (102). For example, equipment for producing the product of the requested quantity of the requested quantity information 21 is selected from the equipment calendar information 25, and the production date is determined in consideration of the transportation lead time of the transportation calendar information 24. FIG. In addition, it is preferable to refer to the setup change information 27, change the setup as necessary, and switch the products to be produced to produce a plurality of types of products in one day. Also, it is preferable to refer to the production information 26 and select a production facility with a low production unit price. The created production plan is stored in production plan information 31 and setup change plan information 32 .

Next, a specific example of production planning processing will be described. A production plan can be generated by a general scheduling method. An example is described here. The date obtained by going back the transportation lead time of the transportation calendar information 24 from the request date of the request amount information 21 is set as the date of shipment from the factory. The factory determines the production equipment and production date according to the selected scenario so that the requested quantity can be shipped on the shipping date.

For example, when Scenario 1 is selected, one item is produced for each facility every day in the order registered in the item information 22 . If items are registered in the order of product A, product B, and product C in the item information 22, and there is equipment X, product A will be registered to equipment X on October 1, 2018, the first day of production, and product A will be registered on October 1, 2018. The product B is assigned to the facility X on the 2nd of the month, and the product C is assigned to the facility X on the 3rd of October, 2018. The production capacity of the facility X is 150, and the load of the product A on the facility X is 1. Therefore, on October 1, 2018, the facility X produces 150 products A. The changeover load from product A to product B is 0, and the load of product B in facility X is 1. Therefore, 150 units of product B are produced in facility X on October 2, 2018. Similarly, the production date and production quantity are determined for all items, shipping dates and quantities.

Next, the production plan/transportation plan generation unit 15 creates a transportation plan according to the generated production plan (103). For example, the transportation date is determined according to the production plan stored in the production planning information 31, the transportation lead time of the transportation calendar information 24, and the requested amount of the requested amount information 21, and the item information 22 and the transportation calendar information 24 are referred to. Determine the container (i.e. departure date) in which the product will be shipped and generate a shipping plan. The created transport plan is stored in transport item plan information 33 and transport cost information 34 . Furthermore, based on the production plan information 31 and the transportation item plan information 33, the inventory quantity for each scenario and for each product is calculated and recorded in the inventory information 35. FIG. Inventory information 35 may be recorded in inventory management system 6 .

Next, a specific example of transportation plan creation processing will be described with reference to FIG. First, the earliest departure date after the planning date is selected from the transportation calendar information 24 (111). Next, items whose shipping dates determined by the production planning process are between the previous departure date and the retrieved departure date are identified. For the specified item, the container occupancy rate registered in the item information 22 is multiplied by the shipping amount to determine the transportation rate of the item for the current departure date. The total shipping rate is calculated 112 by adding the shipping rates for all identified items. Then, an integer value obtained by rounding up the decimal point of the total transportation rate is set as the number of containers (113). Then, search for the earliest departure date after the departure date. If there is no applicable date, the process is terminated, and if there is an applicable date, the process returns to step 111 and repeats the process.

Next, the production plan/transportation plan generation unit 15 calculates production costs, changeover costs, transportation costs, and inventory costs (104). For example, by multiplying the production volume of the production plan information 31 by the production unit price of the production information 26, the production cost for each product is calculated. The calculated production cost is stored in the production plan information 31. FIG. Also, regarding the calculation of the changeover cost, the changeover plan information 32 is referenced in the changeover information 27 to record the changeover load and loss cost recorded in the changeover plan information 32 . It should be noted that referring to the production plan information 31, the load should be set to 0 because the setup change outside the operating hours of the facility does not affect the production volume of the product. As for the calculation of the transportation cost, the transportation cost of the transportation calendar information 24 is recorded as the transportation cost of the transportation cost information 34 . Also, the inventory cost is calculated by referring to the inventory unit price information 23 and recorded in the inventory information 35 .

Finally, the total cost obtained by summing the calculated production cost, changeover cost, transportation cost, and inventory cost is recorded in the cost information 36 . The sum of the production cost, setup change cost, transportation cost, and inventory cost may be weighted and totaled. This weighting factor may be determined according to a user's instruction, or may be determined in consideration of seasonality. By calculating the total cost by adding the costs multiplied by weighting factors, it is possible to calculate an appropriate total cost considering various factors. For example, a product that degrades or depreciates in inventory may have a higher inventory cost factor so that plans with less inventory have lower total costs. Also, when the cash flow is abundant, the effect of the inventory cost on management is small, and the coefficient of the inventory cost may be small.

In step 104, the total cost is calculated including the production cost, but the total cost may be calculated without including the production cost. If the unit load or production unit price differs depending on the equipment used, the production cost will also differ depending on the order in which the product is produced. On the other hand, if the unit load and production unit price are the same depending on the equipment used, the production volume is determined according to the requested volume, so the production volume of the product (that is, the production cost) does not change depending on the scenario. In such cases, calculating the total cost without including the production cost can reduce the computational load.

Next, the production plan/transportation plan generator 15 determines whether the calculated total cost is cheaper than the provisional solution (105). Note that the initial value of the provisional solution is set to infinity when a new scenario is selected. Then, if the total cost is cheaper than the provisional solution, the calculated total cost is saved as the provisional solution (106).

In this example, the method of creating a transportation plan after creating a production plan was explained. It is also possible to create a production plan and a transportation plan at the same time by solving with a general method such as

Next, the production plan/transportation plan generation unit 15 determines whether the cost calculation using all of the production plans and transportation plans generated according to the selected scenario has been completed (107). If the cost calculation for the selected scenario has not been completed, the process returns to step 102 to create the next production plan and transportation plan, and continue to calculate costs based on this plan. On the other hand, if all costs have been calculated for the selected scenario, the process proceeds to step 108 (107).

At step 108, the production plan/transportation plan generator 15 determines whether the cost calculation for all scenarios in the scenario information 28 has been completed. If the cost calculation for a part of the scenario has not been completed, the provisional solution for that scenario is stored in the memory 14, the process returns to step 101, another scenario is selected, and the cost calculation is continued. On the other hand, if the calculation of costs for all scenarios has been completed, the process proceeds to step 109 .

After that, the screen generator 16 generates data for displaying a screen on which the user can view the generated production plan, transportation plan, and calculated cost (109). The generated data is output from the input/output interface 13 and displayed on the display device 17 .

FIG. 4 is a diagram showing a configuration example of the requested amount information 21. As shown in FIG. The requested quantity information 21 is data summarizing product orders sent from the customer's POS system 3, and is used when generating a production plan (step 102 in FIG. 2). The requested amount information 21 includes date, sales location name, item name, and requested amount data. The date is the date on which the product should be delivered to the place of sale (name of sales base). In this embodiment, an example of creating a transportation plan for transporting a product manufactured in a factory in one country to another country, which is a sales area, in a shipping container, is shown. You may define by the city name in which they are located.

FIG. 5 is a diagram showing a configuration example of the item information 22. As shown in FIG. The item information 22 is information related to the quantity of the means (shipping container) that transports the products produced in the factory to the sales area, and is used when generating the production plan and when calculating the transportation cost (step 102 in FIG. 2, 104). The item information 22 includes item name and container occupancy data. In other words, the item information 22 records the occupancy rate of the container when one product is transported. For example, product A occupies 1/1000th of the volume of the container, in other words one container can carry 1000 products A. Note that the item information may be defined by the weight of the product instead of the volume of the product.

FIG. 6 is a diagram showing a configuration example of the inventory unit price information 23. As shown in FIG. The inventory unit price information 23 is cost information for keeping products as inventory, and is used when calculating the inventory cost (step 104 in FIG. 2). The inventory unit price information 23 includes data on site names, item names, and inventory storage unit prices. The inventory storage unit price may be recorded in yen cost per day (for example, in units of 1,000 yen), but may also be recorded in other periods and units (local currency units per month). For example, if product A is stocked at the Indonesian factory, the cost is 1,000 yen per day.

FIG. 7 is a diagram showing a configuration example of the transportation calendar information 24. As shown in FIG. The transportation calendar information 24 is information relating to transportation of containers carrying products, and is used when generating transportation plans and calculating inventory costs (steps 103 and 104 in FIG. 2). The transportation calendar information 24 includes departure date, origin name, destination name, number of containers, transportation lead time (transportation LT), and transportation cost. The number of containers is the number of containers reserved for product distribution by a distributor or a wholesaler operating this production/transportation planning system 1 . The transport lead time is the time (days) required for transporting a container from the origin to the destination. The transportation cost is the cost (for example, in units of 1,000 yen) required for transporting the container from the origin to the destination.

FIG. 8 is a diagram showing a configuration example of the facility calendar information 25. As shown in FIG. The equipment calendar information 25 is information relating to the operation of equipment in the factory, and is used when generating a production plan (step 102 in FIG. 2). The equipment calendar information 25 includes date, production site name, equipment name, and production capacity data. Production capacity is recorded in predetermined units (eg, unit load, which is the time it takes to produce a product). For example, on October 1, 2018, the production capacity of facility X in the Indonesian factory is 150 units, and the production capacity of facility Y is 200 units.

FIG. 9 is a diagram showing a configuration example of the production information 26. As shown in FIG. The production information 26 is information on the production of products in the factory, and is used when generating a production plan and calculating production costs (steps 102 and 104 in FIG. 2). The production information 26 includes data on production base names, facility names, item names, unit loads, and production unit prices. A unit load is the time to produce a product. The production unit price is the cost of producing a product, including material costs and depreciation costs for production equipment. For example, the unit load for producing product A with facility X and facility Y in the Indonesian factory is 1, the cost of producing product A with facility X is 10,000 yen, and the cost of producing product A with facility Y is 15. 1,000 yen. The unit load (production time) of the product A is the same for both the equipment X and the equipment Y, but it can be seen that the production cost of the equipment Y is higher than that of the equipment X.

FIG. 10 is a diagram showing a configuration example of the setup change information 27. As shown in FIG. The changeover information 27 is information relating to the changeover of products in the factory, and is used when generating a production plan and calculating production costs (steps 102 and 104 in FIG. 2). The changeover information 27 includes data on previous items, subsequent items, loss costs, and loads. The loss cost is the cost required for cleaning the production equipment, exchanging the molds, etc. in order to switch products to be produced, and is recorded in units of 1,000 yen, for example. The load is the load that occurs when multiple types of products are produced on the same day, that is, the time required to switch the product to be produced, and is represented by a unit load. For example, the cost of switching from product A to product B is 1,000,000 yen, and the switching time is 10 unit loads.

FIG. 11 is a diagram showing a configuration example of the scenario information 28. As shown in FIG. Scenario information 28 is a rule for generating a production plan and a transportation plan that are prerequisites for cost calculation, and one of the registered scenarios is selected in step 101 of FIG. The scenario information 28 includes scenario numbers and input order determination rule data. For example, Scenario 1 is a scenario in which one item is produced per day in the order recorded in the item information 22 (in the order of products A, B, and C), and setup is changed outside of operating hours on the production set-up day. Scenario 2 is a scenario in which the production of products is started in the order of earliest requested date, and the requested amount is produced in order of shortest setup change time. Scenario 3 is a scenario in which the requested amount is produced in the order recorded in the item information 22 (the order of products A, B, and C).

FIG. 12 is a diagram showing a configuration example of the production plan information 31. As shown in FIG. The production plan information 31 is a production plan generated according to the scenario and generated in steps 102 and 104 of FIG. The production plan information 31 includes data on scenarios, dates, production site names, equipment names, input order, item names, production volumes, and production costs. For example, using Scenario 2, on October 1, 2018, equipment X in the Indonesian factory produces 90 units of product A (the production cost is 900,000 yen), and after that, equipment X produces 25 units of product C. (The production cost is 500,000 yen.) The plan is recorded.

FIG. 13 is a diagram showing a configuration example of the setup change plan information 32. As shown in FIG. The changeover plan information 32 is information on changeovers in the generated production plan, and is generated in steps 102 and 104 of FIG. The changeover plan information 32 includes scenario, date, production site name, previous item, subsequent item, load, and loss cost data. For example, using Scenario 1, a plan is recorded to switch from product A to product B at equipment X in the Indonesian factory on October 2, 2018, with a load of 0 unit hours and a cost of 1,000,000 yen. Something is recorded. In this case, the product to be produced is switched every day, and the setup change is performed outside the operating hours of the equipment, so there is no impact on the production of the products before and after, and the load is zero. Also, using Scenario 2, a plan to switch from product A to product C at equipment X in the Indonesian factory on October 1, 2018 is recorded, with a load of 10 unit hours and a cost of 100,000 yen. Something is recorded.

FIG. 14 is a diagram showing a configuration example of the transportation item planning information 33. As shown in FIG. The transport item plan information 33 is a transport plan generated according to the scenario, and is generated in step 103 of FIG. The transport item plan information 33 includes data on scenario, departure date, origin name, destination name, item name, and transport volume. For example, 90 units of product A and 70 units of product B produced in the Indonesian factory using Scenario 1 are shipped from Indonesia to Japan on October 2, 2018, and the transportation plan is recorded.

FIG. 15 is a diagram showing a configuration example of the transportation cost information 34. As shown in FIG. The transportation cost information 34 is information on the transportation cost of the transportation plan generated according to the scenario, and is generated in steps 103 and 104 of FIG. The transportation cost information 34 includes data on scenario, date of departure, origin name, destination name, number of containers, and transportation cost. For example, using Scenario 1, it is recorded that the transportation cost for one container that ships products produced in the Indonesian factory from Indonesia to Japan on October 2, 2018 is 2,000,000 yen.

FIG. 16 is a diagram showing a configuration example of the inventory information 35. As shown in FIG. The inventory information 35 is inventory information derived from the production plan and transportation plan generated according to the scenario, and is generated in steps 103 and 104 of FIG. The inventory information 35 includes scenario, date, production site name, item name, inventory quantity, and inventory cost data. For example, for product A produced at the Indonesian factory according to Scenario 1, the inventory on October 1, 2018 is 150 (inventory cost is 150,000 yen), and the inventory on the 2nd and 3rd of the same month is 60 (inventory The cost is 60,000 yen), and the inventory amount on October 1, 2018 is 150 (inventory cost is 150,000 yen).

FIG. 17 is a diagram showing a configuration example of the cost information 36. As shown in FIG. The cost information 36 is information on the production cost, setup change cost, transportation cost, and inventory cost calculated in step 104 of FIG. 2, and is calculated in step 104 of FIG. When comparing costs without including the production cost, the total cost may be calculated without including the production cost, and the cost information 36 may not include the production cost.

FIG. 18 is a diagram showing an example of a scenario comparison screen. The scenario comparison screen is output from the input/output interface 13 and displayed on the display device 17 . On the scenario comparison screen, the costs are displayed in graph form so that the costs for each scenario can be compared. In addition, you may represent cost with a numerical value. In addition, the production cost, setup change cost, transportation cost, and inventory cost are displayed in a distinguishable manner, so that it is possible to see which cost contributes to the reduction of the total cost. When comparing costs without including production costs, setup change costs, transportation costs, and inventory costs are displayed.

FIG. 19 is a diagram showing a configuration example of a production/transportation planning screen. The production/transport planning screen is output from the input/output interface 13 and displayed on the display device 17 . On the production/transportation plan screen, the production plan and shipping date of the product for each day and for each facility in the production plan and transportation plan that minimize the total cost for each scenario are displayed in a graph format. For example, it can be seen that part of product B produced at facility X on October 2nd will be shipped on October 2nd, but the rest will be in inventory.

In the production/transportation plan screen, the production plan and transportation plan that minimize the total cost are output for each scenario, but the production plan and transportation plan may be output under other conditions (minimum inventory cost). By selecting the production plan and the transportation plan according to the inventory cost, a user who has a large influence of the inventory cost on management can easily generate an appropriate production plan and transportation plan.

As described above, the production plan/transportation plan generation unit 15 generates a product production plan (production plan information 31) so that the requested amount can be delivered by the input requested date. Generate a transportation plan for the product (transportation item plan information 33) so that the product produced by will reach the destination by the requested date, calculate the transportation cost of the generated transportation plan (transportation cost information 34), and generate Calculate the changeover loss cost (changeover plan information 32) in the generated production plan, calculate the inventory cost (inventory information 35) in accordance with the generated production plan and transportation plan, and calculate the calculated transportation cost, Since the loss cost and inventory cost are output as a scenario comparison screen, the production plan and transportation plan can be integrated to generate a low-cost plan.

In addition, the production plan/transportation plan generation unit 15 uses Scenario 2 to start production of products in order of earliest requested dates and to produce requested amounts in order of short setup changeover times, so that the requested dates and times of products are complied with. can generate low-cost production and transportation plans.

In addition, the production/transportation plan generation unit 15 adds the calculated transportation cost, loss cost, and inventory cost to calculate the total cost, and generates the production plan and transportation plan that minimize the total cost on the production/transportation plan screen. , the low-cost plan can be easily selected from the generated production plans and transportation plans.

In addition, the production plan/transportation plan generation unit 15 calculates the total cost by adding the values obtained by multiplying the calculated transportation cost, loss cost, and inventory cost by a predetermined weighting factor. A suitable total cost can be calculated.

In addition, the production plan/transportation plan generating unit 15 calculates the production cost of the product in the generated production plan and adds the calculated production cost to calculate the total cost. Even if they are different, the total cost can be calculated properly.

In addition, the production plan/transportation plan generation unit 15 generates a plurality of production plans and a plurality of transportation plans according to a plurality of scenarios, and the production plan and transportation plan that minimize the total cost for each scenario as the production/transportation plan screen. Since it is output, an appropriate production plan and transportation plan can be presented for each scenario, and the user can easily select a low-cost plan.

In addition, since the production plan/transportation plan generator 15 outputs the production plan and transportation plan that minimize the inventory cost, the production plan and transportation plan suitable for users who want to reduce the impact of inventory cost on management can be easily generated. can be generated.

It should be noted that the present invention is not limited to the embodiments described above, but includes various modifications and equivalent configurations within the scope of the appended claims. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and the present invention is not necessarily limited to those having all the described configurations. Also, part of the configuration of one embodiment may be replaced with the configuration of another embodiment. Moreover, the configuration of another embodiment may be added to the configuration of one embodiment. Further, additions, deletions, and replacements of other configurations may be made for a part of the configuration of each embodiment.

In addition, each configuration, function, processing unit, processing means, etc. described above may be realized by hardware, for example, by designing a part or all of them with an integrated circuit, and the processor realizes each function. It may be realized by software by interpreting and executing a program to execute.

Information such as programs, tables, and files that implement each function can be stored in storage devices such as memories, hard disks, and solid state drives (SSDs), or recording media such as IC cards, SD cards, and DVDs.

In addition, the control lines and information lines indicate those considered necessary for explanation, and do not necessarily indicate all the control lines and information lines necessary for mounting. In practice, it can be considered that almost all configurations are interconnected.

1 production/transport planning system 2 storage device 3 customer POS system 4 factory production control system 5 transport control system 6 inventory control system 11 processor 12 communication interface 13 input/output interface 14 memory 15 transport plan generator 16 screen generator 17 display device 18 keyboard 21 requested amount information 22 item information 23 inventory unit price information 24 transportation calendar information 25 facility calendar information 26 production information 27 changeover information 28 scenario information 31 production plan information 32 changeover plan information 33 transportation item plan information 34 transportation cost information 35 Inventory information 36 Cost information

Claims (10)

A production and transportation planning system,
comprising an arithmetic unit for executing predetermined processing and a memory accessible by the arithmetic unit,
The computing device is
Generating a plurality of product production plans so that the products are produced in the order of the entered request dates and in the order of the lowest loss costs, and the requested amounts can be delivered by the request dates;
generating a plurality of transportation plans for the product so that the product produced according to the generated production plan will arrive at the destination by the requested date;
Calculate a transportation cost using the transportation rate in the generated transportation plan;
Calculate the changeover loss cost in the generated production plan,
Calculate the inventory cost by multiplying the inventory quantity and the inventory unit price according to the generated production plan and transportation plan,
adding the calculated transportation cost, loss cost and inventory cost to calculate a plurality of total costs;
Selecting and outputting a combination of a production plan and a transportation plan that minimizes the total cost from among the plurality of calculated total costs,
The arithmetic device selects the earliest departure date, and multiplies the container occupancy rate of the item whose shipment date determined by the production plan is between the previous departure date and the selected departure date by the shipment amount for transportation. A production/transportation planning system characterized by determining a transportation rate, and calculating a transportation cost based on the number of containers obtained by converting the total transportation rate calculated by adding the determined transportation rate for all items into an integer. . The production/transportation planning system according to claim 1,
The production/transportation planning system, wherein the arithmetic unit calculates a total cost by adding a value obtained by multiplying each of the calculated transportation cost, loss cost and inventory cost by a predetermined weighting factor. The production/transportation planning system according to claim 1 or 2,
The computing device is
Calculate the production cost of the product in the generated production plan;
A production/transportation planning system, wherein the calculated production cost is also added to calculate a total cost. The production/transportation planning system according to claim 1,
Stores multiple scenarios that are rules for generating production plans and transportation plans that are prerequisites for calculating costs,
The computing device is
generating a plurality of production plans and a plurality of transportation plans according to the plurality of scenarios;
A production/transportation planning system that outputs a production plan and a transportation plan that minimize total cost for each of the scenarios. The production/transportation planning system according to claim 1,
A production/transportation planning system, wherein the arithmetic device outputs a production plan and a transportation plan that minimize an inventory cost. A production and transportation planning method executed by a computer,
The computer has an arithmetic device that executes a predetermined process and a memory that can be accessed by the arithmetic device,
The method includes:
The arithmetic device produces the products in the order of the earliest requested date and in the order of lowest loss cost, and generates a plurality of production plans for the product so that the requested amount can be delivered by the requested date,
The computing device generates a plurality of transportation plans for the product so that the product produced according to the generated production plan will arrive at the destination by the requested date;
The computing device calculates a transportation cost using the transportation rate in the generated transportation plan;
The computing device calculates a changeover loss cost in the generated production plan,
The computing device calculates an inventory cost by multiplying the inventory quantity and the inventory unit price according to the generated production plan and transportation plan,
the computing device adding the calculated transportation costs, loss costs and inventory costs to calculate a plurality of total costs;
The computing device selects and outputs a combination of a production plan and a transportation plan that minimizes the total cost from among the plurality of calculated total costs,
The arithmetic device selects the earliest departure date, and multiplies the container occupancy rate of the item whose shipment date determined by the production plan is between the previous departure date and the selected departure date by the shipment volume for transportation. A production/transportation planning method, characterized by determining a transportation rate, and calculating a transportation cost based on the number of containers obtained by integerizing the total transportation rate calculated by adding the determined transportation rate for all items. . The production and transportation planning method according to claim 6,
The production/transportation planning method, wherein the calculation unit calculates a total cost by adding a value obtained by multiplying each of the calculated transportation cost, loss cost, and inventory cost by a predetermined weighting factor. The production/transportation planning method according to claim 6 or 7,
The computing device is
Calculate the production cost of the product in the generated production plan;
A production/transportation planning method, wherein the calculated production cost is also added to calculate a total cost. The production and transportation planning method according to claim 6,
The computer stores a plurality of scenarios that are rules for generating production plans and transportation plans that are prerequisites for calculating costs,
The computing device is
generating a plurality of production plans and a plurality of transportation plans according to the plurality of scenarios;
A production/transportation planning method, wherein a production plan and a transportation plan that minimize total cost are output for each of the scenarios. The production and transportation planning method according to claim 6,
A production/transportation planning method, wherein the computing device outputs a production plan and a transportation plan that minimize an inventory cost.

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