JP2014164501A - Control device, simulation system, control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an appropriate production plan and transportation plan without repeated simulations.SOLUTION: A control device comprises: an order reception information input unit 201 which receives input of order volume and a delivery day of products to be transported to a demand place; a transportation plan alteration unit 205 which alters a transportation plan of the products when the number of the products at the demand place falls below or exceeds a prescribed criterion as a result of transporting the products on the basis of a transportation plan; and a production plan alteration unit 206 which alters a production plan of the products when the number of the products in a stage in a supply chain falls below or exceeds a prescribed criterion on the basis of production volume, order volume, or inventory of the products based on the production plan.

Description

  The present invention relates to a control device that controls a supply chain that transports a product produced in a supply place at a certain point to a demand point that is another point, a simulation system that simulates the supply chain, a control method, and a program.

  A production management method called prospective production is widely used for products having a long lead time from production to delivery with respect to the delivery date of the product requested by the customer. Prospect production is a production management technique for storing a product inventory in a location near a customer and producing a product to be stored in the inventory based on an order forecast. In a supply chain that performs such prospective production, it is necessary to make an accurate order prediction and reduce the deviation from the actual order.

  On the other hand, in Patent Document 1, a production plan corresponding to a change in orders is generated, a simulation is executed according to the production plan, and the simulation is repeatedly executed until an evaluation value obtained by the simulation satisfies a predetermined standard. Thus, a technique for obtaining an appropriate production plan and transportation plan is disclosed.

International Publication No. 2009/061733

  In recent years, shipping services with a low transportation cost are generally selected as a means for transporting products. For this reason, the lead time from the start of production until the finished product is stored as inventory tends to be longer. On the other hand, the order forecast period used for the production plan needs to be determined according to the lead time. However, the longer the order forecast period, the greater the influence of order variation, and the lower the accuracy of the production plan. Even if the method disclosed in Patent Document 1 is used, the accuracy of the production plan is lowered according to the length of the lead time as long as the order fluctuation occurs.

  On the other hand, it is conceivable to reestablish the production plan by recalculating the production plan every time an order fluctuation occurs using the method disclosed in Patent Document 1, but the method disclosed in Patent Document 1 performs a simulation. Since the optimum production plan and transportation plan are obtained by repeatedly executing, there is a problem that the combination of simulation conditions becomes enormous and it takes time to obtain an appropriate production plan and transportation plan.

  The objective of this invention is providing the control apparatus, simulation system, control method, and program which solve the subject mentioned above.

  The present invention has been made to solve the above-described problems, and transports a product produced at a supply point that is a certain point based on a production plan and a transportation plan that are generated in advance to a demand point that is another point. A control device for controlling a supply chain, and an order information input unit for receiving an input of an order quantity and a delivery date of the product to be transported to the demand area, and transporting the product based on the transport plan Thus, when the number of the products in the demand area on the delivery date falls below a predetermined standard or exceeds a predetermined standard, the transportation plan change unit that changes the transportation plan of the product, and the production plan When the number of products at a certain point in the supply chain falls below a predetermined standard or exceeds a predetermined standard based on the production volume of the product, the order volume, or the inventory volume Characterized in that it comprises a production plan changing unit for changing the production plan of the product.

  In the present invention, the transportation plan change unit is a transportation means used for transportation of the product in the transportation plan, from the earliest date that can be set as the transportation start date of the product to the delivery date. When the transportation period is shorter than the normal transportation means, the product transportation means is changed to a transportation means having a transportation period shorter than that of the normal transportation means.

  In the present invention, the transportation plan change unit is a transportation means used for transportation of the product in the transportation plan, from the earliest date that can be set as the transportation start date of the product to the delivery date. In the case where it is longer than the transportation period by the normal transportation means, the transportation start date of the product is advanced.

  In the present invention, the production plan change unit may change the production plan so that a sum of the production amounts in a predetermined period and a sum of the order quantities in the period coincide with each other.

  Further, in the present invention, the production plan changing unit changes the production plan so that a sum of the production quantities at the lead time of the product matches a sum of the order quantities at the lead time. To do.

  Further, the present invention is a simulation system for simulating a supply chain for transporting a product produced at a supply point at a certain point to a demand point at another point, which is based on a production plan and a transportation plan generated in advance. A simulator for simulating the production of the product at the supply area and the transportation of the product to the demand area, and an order information input section for receiving an order quantity and a delivery date of the product to be transported to the demand area And if the number of the products in the demand area falls below a predetermined standard or exceeds a predetermined standard by transporting the product based on the transportation plan, A transportation plan change section to be changed, and the supply chain based on the production quantity, the order quantity, or the inventory quantity of the product based on the production plan. If the number of the product at the point that is above the case or predetermined criteria below a predetermined standard, characterized in that it comprises a production plan changing unit for changing the production plan of the product.

  In addition, the present invention uses a control device for controlling a supply chain that transports a product produced in a supply area that is a certain point based on a production plan and a transportation plan that are generated in advance to a demand point that is another point. The order information input unit accepts input of an order quantity and a delivery date of the product to be transported to the demand area, and a transport plan change unit transports the product based on the transport plan. When the number of the products in the demand area falls below a predetermined standard or exceeds a predetermined standard on the delivery date, the transportation plan of the product is changed, and the production plan changing unit adds the production plan to the production plan. Based on the production volume of the product based on, the order volume, or the inventory volume, if the number of the products at a point in the supply chain falls below a predetermined standard or exceeds a predetermined standard, And changing the product of the production plan.

  In addition, the present invention provides a computer for a control device for controlling a supply chain, which transports a product produced at a supply location that is a point based on a production plan and a transport plan that are generated in advance to a demand point that is another point. An order information input unit that receives an input of an order quantity and a delivery date of the product to be transported to the demand area, and the product at the demand area on the delivery date by transporting the product based on the transportation plan. The transportation plan change unit that changes the transportation plan of the product, the production amount of the product based on the production plan, the order quantity received, or the inventory quantity when the number of products is below a predetermined standard or exceeds a predetermined standard Based on the production, the production plan of the product is changed when the number of the products at a certain point in the supply chain falls below a predetermined standard or exceeds a predetermined standard. Is a program for functioning as an image changing unit.

  According to the present invention, it is possible to obtain an appropriate production plan and transportation plan without performing repeated simulation by changing the initial production plan and transportation plan based on the input order quantity and delivery date. it can.

It is a schematic block diagram which shows the structure of the simulation system by the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the simulation system which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows the structure of the simulation system by the 2nd Embodiment of this invention. It is a figure which shows the example of the model obtained in the 2nd Embodiment of this invention. It is a figure which shows the example of the model obtained in the 3rd Embodiment of this invention.

<< First Embodiment >>
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic block diagram showing the configuration of a simulation system according to the first embodiment of the present invention.
The simulation system according to the first embodiment simulates a supply chain that transports a product produced at a supply point that is a certain point to a demand point that is another point. The simulation system includes a simulator device 100 that simulates a supply chain, and a control device 200 that controls the simulator device 100 by changing a production plan and a transportation plan used for the simulation based on confirmed order information.

The simulator device 100 includes a factory model 101, a first transport model 102, a second transport model 103, an inventory model 104, and a customer model 105. The factory model 101, the first transport model 102, the second transport model 103, the inventory model 104, and the customer model 105 are examples of simulator units.
The factory model 101 simulates the production of a product by a factory in a supply chain supply area according to a production plan, and stores the number of stocks stored in the supply area. The factory model 101 is preliminarily given information such as a factory in charge of production, a production capacity, a process, a production lead time, a production unit price, and a factory operation date as constraints relating to production.

The first transportation model 102 simulates transportation of a product to a demand area by a transportation means (ordinary transportation means) having a low transportation cost according to a transportation plan. As a normal transportation means, for example, a shipping service is used.
The second transportation model 103 simulates the transportation of the product to the demand area by the transportation means (emergency transportation means) having a transportation period shorter than that of the normal transportation means according to the transportation plan. As an emergency transportation means, for example, air mail is used.
In the first transport model 102 and the second transport model 103, information such as transport lead time, transport unit price, and transportable date is given in advance as a constraint condition related to physical distribution.

The inventory model 104 stores the number of products in stock that are simulated to be transported to demand areas by the first transportation model 102 or the second transportation model 103. The inventory model 104 is preliminarily given information such as an initial inventory quantity, an inventory limit quantity, and an inventory unit price as a constraint condition relating to inventory.
The customer model 105 simulates delivery of the product from the inventory at the demand area to the customer according to the order information input to the control device 200, and subtracts the number of delivered products from the number of inventory stored in the inventory model 104.

The control device 200 includes an order information input unit 201, a plan generation unit 202, an order information storage unit 203, a simulated information acquisition unit 204, a transportation plan change unit 205, and a production plan change unit 206.
The order information input unit 201 accepts input of an estimated order quantity and an expected delivery date of a product to be transported to a demand area in a predetermined period (for example, annually), and an order quantity and a delivery date determined for the product to be transported to the demand area. .
The plan generation unit 202 generates a production plan and a transportation plan in the supply chain based on the predicted order quantity and the expected delivery date received by the order information input unit 201. The production plan associates the production start date of the product with the production amount at the factory in the supply chain supply area. A transportation plan associates a transportation means used for transportation, a transportation start date, and a transportation amount.
The order information storage unit 203 stores the predicted order quantity and the predicted delivery date received by the order information input unit 201, and the confirmed order quantity and delivery date.
The simulated information acquisition unit 204 acquires the production amount of the product, the amount of the product being transported and its arrival date, and the inventory amount from the simulator device 100.
The transportation plan change unit 205 receives the order date and the delivery date stored in the order information storage unit 203 and the delivery date of the product being transported based on the inventory amount and the product amount in transit acquired by the simulated information acquisition unit 204. Change the product transportation plan when the quantity of the product in the demand area is less than the order quantity. Specifically, the transportation plan change unit 205 performs transportation when the inventory falls below a predetermined standard or exceeds a predetermined standard, such as when inventory does not fully absorb fluctuations in orders and there is a possibility that the stock will be out of stock or excessive. Change the transportation plan to keep the inventory at an appropriate value by switching means, transportation start date, and transportation volume.
The production plan change unit 206 changes the product production plan based on the order quantity and delivery date stored in the order information storage unit 203 and the production quantity acquired by the simulated information acquisition unit 204. Specifically, the production plan change unit 206 changes the production plan so that the production amount is corrected so that the sum of the production amounts becomes equal to the sum of the order amounts, and the in-process inventory on the supply chain is appropriately maintained.

Next, the operation of the simulation system according to the first embodiment will be described.
Note that the simulation system according to the first embodiment simulates the supply chain in parallel with the actual operation of the supply chain. That is, the simulation system performs a simulation in which the unit time of the simulation is one day, and the unit time is advanced every time one day of the actual time has passed. In addition, the order quantity and the delivery date actually confirmed in the supply chain are input to the control device 200.

FIG. 2 is a flowchart showing the operation of the simulation system according to the first embodiment of the present invention.
First, the supply chain manager determines a period for performing the simulation, and inputs the predicted order quantity and the predicted delivery date and the production, inventory, and physical distribution constraint conditions to the control device 200 during the period. Thereby, the order information input unit 201 of the control device 200 accepts the input of the predicted order quantity, the predicted delivery date, and each constraint condition (step S1).

  Next, the plan generation unit 202 generates a supply chain production plan and a transportation plan based on the predicted order quantity and the predicted delivery date received by the order information input unit 201 and each constraint condition (step S2). For example, the plan generation unit 202 generates a production plan for starting production of a product on a day before the lead time of the product from the predicted delivery date for a certain product, and transports by the normal transportation means from the predicted delivery date of the product. On the day before the period, a transportation plan for transporting the product by normal transportation means is generated. In addition to the simulation by the simulator device 100, production and transportation are performed using the production plan and transportation plan in the actual supply chain.

  Next, the control device 200 outputs the production plan and transportation plan generated by the plan generation unit 202 and each constraint condition received by the order information input unit 201 to the simulator device 100, and the simulator device 100 outputs the production plan and transportation. Based on the plan and each constraint condition, a simulation is started for one unit time of the supply chain (step S3).

  Specifically, the factory model 101 simulates the production of a product by a factory in the supply chain supply area according to the production plan, and the first transportation model 102 and the second transportation model 103 according to the transportation plan demand areas by the transportation means. Simulate the transportation of the product to. At this time, when the simulator apparatus 100 receives the predetermined order quantity and delivery date input from the control apparatus 200, and the simulated date (time) is the same day as the delivery date, the customer model 105 The product of the order quantity associated with the delivery date is withdrawn from the product stored in the inventory model 104 as inventory.

  Then, the simulator device 100 outputs the product production amount, the in-transport product amount, and the inventory amount obtained by the simulation for one unit time to the control device 200. Thereby, the simulated information acquisition unit 204 of the control device 200 acquires the production amount of the product, the amount of the product being transported and its arrival date, and the inventory amount (step S4).

  Next, the transportation plan change unit 205 of the control device 200 performs inventory based on the order quantity and the delivery date stored in the order information storage unit 203, and the in-transport product quantity and inventory quantity acquired by the simulated information acquisition unit 204. It is determined whether or not the amount is appropriate (step S5). That is, the transportation plan changing unit 205 determines whether the number of the products in the demand area is less than a predetermined standard or exceeds a predetermined standard on the delivery date. Examples of the predetermined standard include the number of items that may be out of stock, a predetermined safety stock amount, a stock limit amount, and the like. Here, the safety stock amount is an amount determined as an extra stock amount required to prevent the product from being out of stock. Note that the predetermined reference may be a predetermined value, or may change periodically (for example, one month) due to user input, prediction calculation, or the like.

  Specifically, the transportation plan changing unit 205, when the simulator device 100 simulates transportation of a product based on the current transportation plan, when the stock quantity of the product in the demand area becomes smaller than the order quantity on the delivery date. In addition, it is determined that the inventory quantity is not appropriate. Alternatively, when the safety stock amount is determined in advance, it is determined that the stock amount is not appropriate when the amount obtained by subtracting the safety stock amount from the product stock amount at the demand place on the delivery date is smaller than the order quantity. The transportation plan changing unit 205 determines that the inventory quantity is not appropriate when the inventory quantity of the product in the demand area on a certain date exceeds the inventory limit quantity given as the constraint condition.

  When the transportation plan changing unit 205 determines that the stock quantity is not appropriate, that is, the number of the products in the demand area on the delivery date falls below a predetermined standard or exceeds the predetermined standard (step S5: NO), the product The transportation plan is changed (step S6). Specifically, the transportation plan changing unit 205 determines that the factory model 101 when the time from the earliest date that can be set as the transportation start date of the product to the delivery date is shorter than the transportation period by the normal transportation means. The transportation means is changed to the emergency transportation means by the amount of the difference between the stock quantity and the order quantity among the products produced in (1). On the other hand, the transportation plan change unit 205 is produced in the factory model 101 when the time from the earliest date that can be set as the transportation start date of the product to the delivery date is longer than the transportation period by the normal transportation means. Among the products to be shipped, the date of the start of transportation by the normal transportation means is advanced by the difference between the stock quantity and the order quantity. At this time, if there is a normal transportation means that starts transportation on a date in time for the delivery date and there is room for further loading of the product in the normal transportation means, it is preferable to transport the product to the normal transportation means. As a result, the product can be transported by the delivery date, and the transportation fee can be minimized. Further, when the inventory amount of the product in the demand area on a certain date is larger than the inventory limit amount, the transportation plan change unit 205 delays the product transportation start date for the difference between the inventory amount and the inventory limit amount. Thereby, the stock quantity of the product in a demand place can be restrained to below the stock limit quantity.

  Then, the transportation plan change unit 205 outputs the changed transportation plan to the simulator device 100. Thereby, the 1st transportation model 102 and the 2nd transportation model 103 of simulator device 100 perform subsequent simulation based on the transportation plan after change. Also in the actual supply chain, the product can be transported appropriately by transporting based on the transport plan changed by the transport plan changing unit 205.

On the other hand, when the transportation plan changing unit 205 determines that the stock quantity is appropriate (step S5: YES), or when the transportation plan is changed, the production plan changing unit 206 stores the orders received by the order information storage unit 203. Based on the quantity and delivery date, the production quantity acquired by the simulated information acquisition unit 204 and the inventory quantity at each point, it is determined whether or not the production quantity is appropriate (step S7). That is, the production plan changing unit 206 determines whether the number of products at a certain point in the supply chain is below a predetermined standard or above a predetermined standard.
Specifically, the production plan change unit 206 receives an order for a product having a delivery date between the lead times when the product is transported by the normal transportation means from the earliest date that can be set as the production start date of the product. If the sum of the quantities does not match the sum of the production quantities in the period, it is determined that the production quantity is not appropriate. Alternatively, when the allowable deviation amount between the production amount and the order quantity is determined in advance, when the difference between the total order quantity and the total production amount exceeds the allowable deviation amount, it is determined that the production quantity is not appropriate.

  If the production plan change unit 206 determines that the production amount is not appropriate (step S7: NO), the production plan change unit 206 changes the product production plan with respect to the difference between the total order quantity and the total production quantity (step S8). . For example, when the production amount is too low, the production plan changing unit 206 determines the production amount on the day with the smallest production amount among the production start dates determined in the production plan as the sum of the order quantity and the sum of the production amounts. The production plan may be changed by increasing the difference amount. Further, for example, when the production amount is excessive, the production plan changing unit 206 calculates the production amount on the day with the largest production amount among the production start dates determined in the production plan as the sum of the order quantities and the production amount. The production plan may be changed by decreasing the amount of difference from the sum of the two. In addition, when the production amount cannot be increased on any production start date, the production plan changing unit 206 adds a date that is not set as the production start date as a new production start date. You may change the plan. Further, the production plan changing unit 206 subtracts the inventory amount in the demand area and the transportation amount of the product being transported from the number obtained by multiplying the average inventory usage amount by the product lead time, and further adds a predetermined safety stock amount. The production plan may be changed so that only the number is ordered.

  Then, the production plan changing unit 206 outputs the changed production plan to the simulator device 100. Thereby, the factory model 101 of the simulator apparatus 100 performs the subsequent simulation based on the changed production plan. Also, in an actual supply chain, a product can be appropriately produced by producing based on the production plan changed by the production plan changing unit 206.

  Next, the control device 200 determines whether or not the current date and time corresponds to the simulation end date (step S9). For example, the control device 200 can determine that the current date / time corresponds to the end date of the simulation when the predicted order quantity and the predicted delivery date period received in step S1 have elapsed.

  When the control device 200 determines that the current date does not correspond to the simulation end date (step S9: NO), the order information input unit 201 determines the order quantity and the delivery date determined on the date simulated by the simulator device 100. Is received (step S10). Since the simulation system according to the first embodiment simulates the supply chain in parallel with the actual operation of the supply chain, the manager has the order quantity and the delivery date actually confirmed on that day. In this case, the order quantity and the delivery date are input to the control device 200.

When receiving the input of the confirmed order quantity and delivery date, the order information input unit 201 outputs the order quantity and delivery date to the simulator device 100 and records the order quantity and delivery date in the order information storage unit 203. . Thereby, the customer model 105 of the simulator apparatus 100 can withdraw the product of the order quantity from the inventory model 104 on the delivery date.
Then, when the actual time has elapsed by one unit time, that is, the next day, the process returns to step S3, and the simulation is executed for the next one unit time.

  On the other hand, when the control device 200 determines in step S9 that the current date / time corresponds to the simulation end date (step S9: YES), the simulator device 100 ends the supply chain simulation (step S11). Then, the simulator device 100 outputs the production / inventory / distribution time transition information obtained by the simulation to the external device (step S12).

  As described above, according to the simulation system according to the first embodiment, it is possible to obtain an optimum production plan and transportation plan in a short time when an order fluctuation in the supply chain occurs. In addition, when a demand exceeding the capacity of a certain base or line occurs, it is possible to identify a base or line where a shortage may occur in the future.

  In addition, according to the simulation system according to the first embodiment, the transportation plan changing unit 205 is configured such that the time from the date when the order information input unit accepts the input of the order quantity and the delivery date to the delivery date is the normal transportation means. If there is more than the period of transportation by, the date of commencement of transportation by normal means of transportation is advanced. Thus, the product can be transported to the demand place on the delivery date while minimizing the transportation cost.

  In addition, according to the simulation system according to the first embodiment, the transportation plan changing unit 205 is configured such that the time from the date when the order information input unit accepts the input of the order quantity and the delivery date to the delivery date is the normal transportation means. If it is shorter than the transportation period, the transportation means is changed to the emergency transportation means. Thereby, even when the time until the delivery date is short, the product can be transported to the demand place on the delivery date.

  Further, according to the simulation system according to the first embodiment, the transportation plan changing unit 205 leads when the product is transported by normal transportation means from the date when the order information input unit accepts the input of the order quantity and the delivery date. The production amount is changed so that the sum of orders received for products with delivery dates between times matches the sum of production amounts in the period. This can prevent overproduction and underproduction of the product. In particular, by setting the total calculation period as the lead time, it is possible to prevent the production plan from being significantly changed when the fluctuation in orders received for the production volume is small and it is possible to cope with inventory.

<< Second Embodiment >>
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 3 is a schematic block diagram showing the configuration of the simulation system according to the second embodiment of the present invention.
The simulation system according to the second embodiment is different from the first embodiment in the configuration of the simulator device 100. In 1st Embodiment, the simulator apparatus 100 demonstrated the example provided with the factory model 101, the 1st transport model 102, the 2nd transport model 103, the inventory model 104, and the customer model 105 previously. On the other hand, the simulator device 100 according to the second embodiment generates and executes each model based on information read from an external file.

The simulator device 100 according to the second embodiment includes a file reading unit 110, a model building unit 120, and a simulator unit 130.
The file reading unit 110 reads an external file indicating the connection relationship between the factory model, the inventory model, and the transportation model.
The model construction unit 120 analyzes the external file read by the file reading unit 110 and generates a program that causes the simulator unit 130 to operate as each model based on the connection relationship indicated by the external file. The model construction unit 120 stores the super class program of each model in advance, and can inherit the super class based on the information indicated by the external file, thereby constructing the model indicated by the external file.
The simulator unit 130 includes a factory model, an inventory model, and a transportation model by executing the program generated by the model construction unit 120, and operates each model.

FIG. 4 is a diagram illustrating an example of a model obtained in the second embodiment of the present invention.
FIG. 4A is a diagram illustrating an example of an external file indicating a connection relationship between models.
The external file stores, for each product, a product ID of the product and a flow in which processes from production to delivery of the product are arranged in order. In the external file, each process is described in a format of ““ model ”/“ character string consisting of ID and location ””. The model construction unit 120 extracts “a model” and “a character string made up of an ID and a place” from the process, and identifies a program having “model” as a class name. Next, the model construction unit 120 generates a subclass having the class indicated by the program as a superclass, and assigns “a character string including an ID and a location” to the class name of the subclass. For example, the process 1 for the product ID 101 shown in FIG. 4A is a subclass “F1_Japan” whose superclass is “Factory” (factory model 101). In this embodiment, two subclasses having “Transportation” as a superclass are generated from one process. This is to realize the above-described normal transportation means and emergency transportation means.

  In addition, the superclass of each model is designed so that information indicating the model to which the product is delivered can be added in the inheritance of the subclass. Here, if another process is stored next to the process indicating the model to be built in the external file read by the file reading unit 110, the model building unit 120 transfers the other process to the model of the delivery destination. To decide. That is, for the process 1 for the product ID 101 shown in FIG. 4A, subclasses “T1a_Japan-Europe” and “T1b_Japan-Europe” having “Transportation” as a superclass as a delivery destination are assigned. Specifically, the model construction unit 120 generates a file indicating a connection relationship as shown in FIG. 4B based on the external file, and determines a delivery destination based on the connection relationship.

  Thereby, the model construction unit 120 generates a program that realizes a model configuration as shown in FIG. 4C, and the simulator unit 130 can execute the program to perform a supply chain simulation.

  Thus, according to the second embodiment, the model construction unit 120 generates a program that realizes a model used for supply chain simulation based on an external file. Thereby, it is possible to change and construct a model indicating an arbitrary supply chain in a short time without changing the program of the simulator device 100.

<< Third Embodiment >>
Next, a third embodiment of the present invention will be described in detail.
In the simulation system according to the third embodiment, in addition to the second embodiment, the external file reading unit reads the component configuration table indicating the relationship between the finished product and the component, and the model construction unit 120 knocks down based on this. Build a model for production.

FIG. 5 is a diagram illustrating an example of a model obtained in the third embodiment of the present invention.
FIG. 5A is a diagram illustrating an example of an external file indicating a connection relationship between models. As shown in FIG. 5A, in the external file according to the third embodiment, the flow of parts is also described in addition to the finished product. In the example shown in FIG. 5, ID 101 indicates a completed product, and ID 100 indicates a part. FIG. 5B is a diagram illustrating an example of a component configuration table read by the external file reading unit. The parts configuration table stores an ID of a finished product and an ID of a part constituting the finished product in association with each other.

  Then, the model construction unit 120 identifies a model common to the part and the finished product, and realizes the model in the same class. In the example shown in FIG. 5, “Factory / Europe” is a model common to the finished product ID 101 and the component ID 100. In this case, as shown in FIG. 5C, the model construction unit 120 connects the flow between the finished product and the part by “Factory / Europe”.

  Thus, according to the third embodiment, in the supply chain that performs knockdown production or the like, the amount of components supplied in each chain can be obtained. That is, it is possible to manage the production, inventory, and logistics of the finished product and the parts that make up the finished product.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  For example, in the above-described embodiment, the case where the simulator apparatus 100 performs the simulation on the same date as the actual supply chain is described, but the present invention is not limited to this. For example, the simulator device 100 may perform a simulation of the past supply chain based on the production plan and the transportation plan predicted in the past supply chain and the order information. Further, a future supply chain simulation may be performed based on a future order prediction of the supply chain and order information obtained by simulating order fluctuations using random numbers or the like.

  In the above-described embodiment, the case where the production plan changing unit 206 determines whether or not the production quantity is appropriate based on the order quantity and the delivery date, the production quantity, and the inventory quantity at each point in step S7 is described. did. However, the present invention is not limited to this, and the production plan change unit 206 determines whether a product shortage may occur at a certain point in the supply chain based on any of the order quantity, the production quantity, the inventory quantity, or a combination thereof. Determine.

  In the above-described embodiment, the production plan change unit 206 always determines whether or not the production amount is appropriate, calculates the production amount that is appropriate when the production amount is not appropriate, and sets the production plan only for the production amount. The case where the production plan is changed by the irregular and non-quantitative method to be changed was explained. However, the present invention is not limited to this, and the production plan changing unit 206 may change the production plan by a regular non-quantitative method or an irregular regular method.

  For example, when the production plan is changed based on the periodic non-quantitative method, the production plan changing unit 206 determines whether or not the inventory amount is appropriate when the simulator apparatus 100 performs a simulation of a date corresponding to a predetermined ordering cycle. The production plan is changed. In this case, the production plan changing unit 206 subtracts the inventory quantity in the demand area and the quantity of the product in transit from the number obtained by multiplying the average inventory usage by the number of days obtained by adding the product lead time and the ordering cycle, The production plan can be changed so as to place an order for an amount of the product with the amount added.

  Further, for example, when the production plan is changed based on the irregular quantification method, the production plan change unit 206 determines whether or not the stock quantity is appropriate every time the simulator apparatus 100 performs the simulation. When the determination is made, the production plan is changed so that a predetermined amount of product is ordered. In this case, the production plan changing unit 206 can use, as the predetermined amount, a product of an amount obtained by adding a predetermined safety stock amount to the number obtained by multiplying the average stock usage amount by the product lead time.

  The simulator device 100 and the control device 200 described above have a computer system inside. The operation of each processing unit described above is stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer reading and executing this program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  DESCRIPTION OF SYMBOLS 100 ... Simulator apparatus 101 ... Factory model 102 ... 1st transport model 103 ... 2nd transport model 104 ... Inventory model 105 ... Customer model 110 ... File reading part 120 ... Model construction part 130 ... Simulator part 200 ... Control apparatus 201 ... Order information input unit 202 ... Plan generation unit 203 ... Order information storage unit 204 ... Simulated information acquisition unit 205 ... Transportation plan change unit 206 ... Production plan change unit

Claims (8)

A control device for controlling a supply chain that transports a product produced in a supply area that is a certain point based on a production plan and a transportation plan generated in advance to a demand point that is another point,
An order information input unit for receiving an input of an order quantity and a delivery date of the product to be transported to the demand area;
The transportation plan of the product is changed when the number of the products in the demand area falls below a predetermined standard or exceeds a predetermined standard by transporting the product based on the transportation plan. Transportation plan change department,
When the number of products at a certain point in the supply chain falls below a predetermined standard or exceeds a predetermined standard based on the production volume of the product based on the production plan, the order volume, or the inventory volume, A control device comprising: a production plan change unit for changing a product production plan. The transportation plan change unit, when the number of the products is below a predetermined standard, the time from the earliest date that can be set as the transportation start date of the product to the delivery date, The transportation means of the product is changed to a transportation means having a transportation period shorter than that of the normal transportation means when the transportation period of the product is shorter than the transportation period of the normal transportation means. Control device. The transportation plan change unit, when the number of the products is below a predetermined standard, the time from the earliest date that can be set as the transportation start date of the product to the delivery date, 3. The control device according to claim 1, wherein when the transportation period of the normal transportation means which is a transportation means used for the transportation of the product is longer than the transportation start date of the product is advanced. The said production plan change part changes the said production plan so that the sum of the said production amount in a predetermined period and the sum of the said order quantities in the said period may correspond. The control device according to any one of the above. The production plan change unit changes the production plan so that the sum of the production quantities at the lead time of the product matches the sum of the order quantities at the lead time. The control device described. A simulation system for simulating a supply chain that transports products produced at a supply point at one point to a demand point at another point,
A simulator unit that simulates production of the product at the supply location and transportation of the product to the demand location based on a pre-generated production plan and transportation plan;
An order information input unit for receiving an input of an order quantity and a delivery date of the product to be transported to the demand area;
The transportation plan of the product is changed when the number of the products in the demand area falls below a predetermined standard or exceeds a predetermined standard by transporting the product based on the transportation plan. Transportation plan change department,
When the number of products at a certain point in the supply chain falls below a predetermined standard or exceeds a predetermined standard based on the production volume of the product based on the production plan, the order volume, or the inventory volume, A simulation system comprising: a production plan change unit for changing a product production plan. A control method using a control device for controlling a supply chain, which transports a product produced in a supply area that is a certain point based on a production plan and a transportation plan that are generated in advance to a demand point that is another point. ,
The order information input unit accepts input of the order quantity and delivery date of the product to be transported to the demand area,
The transportation plan changing unit transports the product based on the transportation plan, so that when the number of products in the demand area falls below a predetermined standard or exceeds a predetermined standard on the delivery date, the product Change the transportation plan for
The production plan change unit is configured to determine whether the number of the products at a certain point in the supply chain is below a predetermined reference or a predetermined reference based on the production amount of the product based on the production plan, the order amount, or the inventory amount. A control method, wherein the production plan of the product is changed. A computer of a control device for controlling a supply chain that transports a product produced in a supply area that is a certain point based on a production plan and a transportation plan generated in advance to a demand point that is another point,
An order information input unit for receiving an input of an order quantity and a delivery date of the product to be transported to the demand area,
The transportation plan of the product is changed when the number of the products in the demand area falls below a predetermined standard or exceeds a predetermined standard by transporting the product based on the transportation plan. Transportation plan change department,
When the number of products at a certain point in the supply chain falls below a predetermined standard or exceeds a predetermined standard based on the production volume of the product based on the production plan, the order volume, or the inventory volume, Program to function as a production plan change section that changes the production plan of a product.

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