JPH0728779A - Production simulation system - Google Patents

Abstract

PURPOSE:To perform the continuous evaluation by reconstituting beginning data at an arbitrary time in the simulation period into the same form as extracted beginning data to change the throwing-in plan, the priority level, etc., of a lot in accordance with the variance in condition of the production line on the simulation. CONSTITUTION:When simulation is executed by a simulation executing means 4, lot history information, lot throwing-in information, low priority information, etc., in the simulation period are outputted as simulation results 10. A beginning data reconstituting means 5 uses the equipment arrival time, the work start time, and the work end time as the keys to extract a beginning lot of the line at the designated date in the simulation period from this lot history information. Lot throwing-in information and lot priority information are referred to reconstitute the beginning data into the input form of a model data generating means 3, and the result is outputted as reconstituted beginning data 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production simulation system used in production prediction planning at a production site, and particularly to a lot input plan, a priority level, etc. in response to a situation change of a production line on a simulation. The present invention relates to a production simulation system suitable for changing and evaluating the.

[0002]

2. Description of the Related Art A conventional production simulation system will be described with reference to the drawings. FIG. 6 is a system configuration diagram showing a conventional example of a production simulation system. This production simulation system is a master that extracts master data 7 such as the number of equipments, operating rates, process procedures, input plans, and work in progress from a production management system (not shown) that manages a target production system (not shown) that is a simulation target. A data creating means 1 and a simulation parameter setting means 2 for setting a parameter 8 which is a simulation parameter for changing the input plan, changing the lot priority, etc.
And model data creating means 3 for creating model data 9 indicating a simulation model from the master data 7 and the parameters 8, and simulation executing means 4 for reading the model data 9 and executing a simulation to output a simulation result 10. Has been done. In this production simulation system, all the execution conditions within the simulation period are required at the start of the simulation.

[0003]

In the conventional production simulation system described above, all the execution conditions within the simulation period are determined at the start of the simulation. Therefore, the situation of the production line at a certain point during the simulation execution period is checked, There is a drawback that it is not possible to change and evaluate the execution conditions such as the lot input plan, the priority, and the equipment operating rate.

For example, in one month, if it is desired to give priority to a lot that has been processed in the rear ¼ process at 20 days and execute it until 30 days, at the start of the simulation, ¼ process after 20 days is completed. It is impossible to prioritize and evaluate such lots because we do not know the lots in progress.

The present invention solves the above problems in the conventional simulation, changes the lot input plan, the priority, etc. in response to the situation change of the production line in the simulation, and enables continuous evaluation. The purpose is to do.

[0006]

The production simulation system of the present invention comprises a master data creating means for extracting master data of the target production system from a production management system for managing the target production system to be simulated, and a simulation. Simulation parameter setting means for setting parameters, model data creating means for creating simulation model data from the master data extracted by the master data creating means and the simulation parameters set by the simulation parameter setting means, and During the simulation period from the simulation execution means for reading the model data and executing the simulation, and the simulation result data generated by the simulation execution means. Work-in-process data of an arbitrary point in time, and a work-in-progress data reconstruction means for reconstructing the in-process data and same type that have been extracted by said master data creation means.

The master data of the target production system is
It is data concerning the number of equipment, operating rate, process procedure, input plan, work-in-progress, etc.

The above-mentioned simulation parameters are parameters relating to the change of the input plan, the change of the lot priority, and the like.

[0009]

The in-process data reconstructing means extracts in-process data at an arbitrary point during the simulation period from the simulation result data generated by the simulation executing means, and the in-process data in the master data extracted by the master data creating means. And reconfigure to the same model. Therefore, the execution condition can be changed according to the situation of the production line at any point during the simulation execution period.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the production simulation system of the present invention. The production simulation system of this embodiment has a configuration in which an in-process data reconstructing means 5 is added to the production simulation system of FIG. Work-in-progress data reconstructing means 5
From the simulation result 10 generated by the simulation executing means 4 reconstructs the in-process data at an arbitrary time point during the simulation in the same form as the in-process data in the master data 7 extracted by the master data creating means 1. It is a thing.

The operation of this embodiment will be described. First, in the master data creating means 1 shown in FIG. 1, master data 7 such as the number of equipments, operating rate, process procedure, working time, input plan, and in-process lot is extracted from the production management system 6 on site.

Next, after studying the master data extracted by the master data creating means 1, especially the in-process data, the simulation parameter setting means 2 changes the input plan, the priority of the lot, the operating rate of the equipment, etc. Set.
The simulation parameter setting here can be performed by a method similar to the method of issuing a production control instruction in the production management system.

Then, from the master data 7 and the parameters 8, the model data creating means 3 creates the model data 9 of the simulation model that matches the input data specifications of the simulator, and the simulation executing means 4 reads the model data 9 and executes the simulation. To do.

When the simulation is executed, lot history information, lot input information, lot priority information, etc. during the simulation period are output as the simulation result 10. As shown in FIG. 2, the lot history information includes equipment name, process name, equipment arrival time, work start time,
The history of simulation execution such as the work end time is written. Further, as shown in FIG. 3, the lot introduction information describes the date and time of introduction of the lot introduced during the simulation period, and the lot priority information shown in FIG. 4 describes the priority of the lot during the simulation period. .

The work-in-progress data reconstructing means 5 extracts work-in-process lots on a line at a designated date and time during the simulation period from the lot history information using the equipment arrival time, work start time, and work end time as keys. Referring to the lot input information and the lot priority information, the work-in-progress data is reconstructed in the input format (the format of the work-in-process file extracted from the production management system) of the model data creating means 3 as shown in FIG. The data is output as the in-process data 11.

Then, the parameters are changed by the simulation parameter setting means 2 using the reconstructed work-in-progress data 11 and the master data 7. At this time, by reconstructing the in-process data in the same format as the in-process file of the production management system, the in-process can be examined in the same manner as the production control method in the production management system.

The model data creating means 3 is created from the newly set simulation parameters and master data.
The model data 9 is created by and the simulation is re-executed from the date and time specified when the work-in-progress data is reconstructed.

[0019]

As described above, according to the present invention, the in-process data during the simulation execution period is reconstructed by reconstructing the in-process data at an arbitrary point during the simulation period in the same format as the extracted in-process data. Can be viewed in the same format as the in-process data extracted from the production management system, so the simulation execution conditions (production plan) corresponding to the in-process situation can be set, and the simulation evaluation in the same form as normal production control can be performed. it can. That is, there is an effect that the lot input plan, the priority, etc. can be changed and the continuous evaluation can be performed in response to the situation change of the production line on the simulation.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a production simulation system of the present invention.

FIG. 2 is a diagram showing lot history information during simulation execution.

FIG. 3 is a diagram showing lot input information during execution of simulation.

FIG. 4 is a diagram showing lot priority information during execution of simulation.

FIG. 5 is a diagram showing in-process lot information after in-process reconfiguration.

FIG. 6 is a system configuration diagram showing a conventional example of a production simulation system.

[Explanation of symbols]

 1 Master Data Creation Means 2 Simulation Parameter Setting Means 3 Model Data Creation Means 4 Simulation Execution Means 5 Work-in-Progress Data Reconstruction Means 6 Production Pipe Connection System 7 Master Data 8 Parameter Data 9 Model Data 10 Simulation Result Data 11 Reconstruction Work-in-Progress Data

Claims (8)

[Claims] 1. A master data creation unit for extracting master data of the target production system from a production management system for managing a target production system to be simulated, a simulation parameter setting unit for setting simulation parameters, and the master. Model data creating means for creating simulation model data from the master data extracted by the data creating means and the simulation parameters set by the simulation parameter setting means, and a simulation executing means for reading the model data and executing a simulation. From the simulation result data generated by the simulation executing means, the in-process data at an arbitrary time point during the simulation period is converted into the master data creating means. Simulation system and a work-in-progress data reconstruction means for reconstructing the extracted-process data of the same type. 2. The production simulation system according to claim 1, wherein the master data of the target production system is data relating to the number of facilities. 3. The production simulation system according to claim 1, wherein the master data of the target production system is data relating to an operating rate. 4. The production simulation system according to claim 1, wherein the master data of the target production system is data relating to a process procedure. 5. The production simulation system according to claim 1, wherein the master data of the target production system is data relating to a supply plan. 6. The production simulation system according to claim 1, wherein the master data of the target production system is work-in-process data. 7. The production simulation system according to claim 1, wherein the simulation parameter is a parameter relating to a change in a supply plan. 8. The production simulation system according to claim 1, wherein the simulation parameter is a parameter relating to lot priority change.