JPH07175510A - Production simulation device - Google Patents

Abstract

PURPOSE:To provide the production simulation device which reduce the operation for the generation of production schedule information by a simulation performer and shorten the time. CONSTITUTION:An input quantity information setting part 1 sets total input quantities by product kinds in a production simulation period. A lot size distribution calculation part 3 obtains history information on an input lot from an input lot history information storage part 2 and calculates distributions of lot sizes by the product kinds. An input lot information setting part 4 receives the information regarding a lot to be produced from the input quantity information setting part 1 and lot size distribution calculation part 3 and generates and sets production schedule information including input lot information obtained by calculating the numbers of input lots by days and the product kinds and the quantities by the lots. A production simulation execution part 7 performs production simulation with a production simulation model generated by a simulation model generation part 6 by receiving information and data from the input lot information setting part 4 and a master data storage part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production simulation apparatus, and more particularly to a production simulation apparatus for a production line having lot size variations.

[0002]

2. Description of the Related Art A conventional production simulation apparatus, as shown in the block diagram of FIG. 6, includes an information setting section 11 for outputting as lot information the number of input lots for each predetermined day and each product type and the quantity for each lot. , Information setting unit 11
Input lot information setting unit 12 that receives and outputs lot information from the production lot information including input lot information, master data storage unit 13 that stores the master data necessary for the target production simulation in advance, and input A production simulation model creation unit 14 that receives information and data from the lot information setting unit 12 and the master data storage unit 13 to create a production simulation model, and a production simulation is executed by using the model created by the production simulation model creation unit 14 as an input. When the production line simulation is executed, the input lot information setting unit 12 that has received the lot information creates the production plan information and stores it in the production plan information and the master data storage unit 13. Equipment in the process procedure information A master data as input data including work data, and dispatching rules, to create a production simulation model using the production simulation model creation section 14, was running production simulation using the subsequent production simulation execution unit 15.

In addition, at this time, in order to perform a simulation closer to an actual state, it has been proposed to change the input data when executing the simulation. As a method of giving a variation to this input data, although the target event is different, as shown in Japanese Patent Laid-Open No. 01-263805, a method of giving the input data of the simulation by a formal distribution function such as a normal distribution, As disclosed in Japanese Patent Laid-Open No. 63-098042, a method of storing input data for the number of simulation executions by being distributed by a normal distribution and sequentially referring to the input data corresponding to the test pattern when executing the simulation. Is proposed.

[0004]

When the above-mentioned conventional production simulation apparatus is operated, the lot size naturally varies in the actual production line. Therefore, in order to perform a simulation in consideration of this variation, the simulation executor requires a great deal of man-hours for all the input lot information including the input lot number and lot size for each day and type included in the production plan information. There was a problem that it had to be spent and created.

Further, at this time, giving the variation of the lot size by a distribution function such as a normal distribution reduces the labor of the simulation executor, but since it is different from the actual lot size distribution, the simulation model is actually manufactured. There is also a problem that the simulation results do not match because they are far from the line.

An object of the present invention is to make it possible to easily output and execute the input data of the lot size matched to the actual lot size distribution, and to reduce the operation and the time for producing the production plan information by the simulation executor. It is to provide a production simulation device capable of

[0007]

The production simulation apparatus according to the present invention includes an information setting section for outputting as lot information the number of input lots and the quantity of each lot for each predetermined day and each product type. The input lot information setting unit which receives the lot information and creates and sets the production plan information including the input lot information, and the master data including the process procedure information, the equipment operation information and the dispatching rule necessary for the target production simulation in advance. A stored master data storage unit, a production simulation model creation unit that receives information and data from the input lot information setting unit and the master data storage unit, and creates a production simulation model, and creation of this production simulation model creation unit The production simulation with the input model In a production simulation device having a production simulation execution unit, the information setting unit sets a total input quantity for each product type within a production simulation period, and a lot size distribution for calculating a lot size distribution for each product type. The calculation unit replaces the input lot information setting unit with the total input quantity for each product type within the production simulation period and the distribution of the lot size for each product type and the number of input lots for each day and product type and the quantity for each lot. Is configured and the input lot information is set.

The production simulation apparatus of the present invention has an input lot history information storage unit for storing history information of past input lots of the production line which is the target of the production simulation as an information input source of the lot size distribution calculation unit. You may.

[0009]

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

FIG. 1 is a block diagram of an embodiment of the present invention.

The production simulation device 8 of the present invention is
An input quantity information setting unit 1 that sets the total input quantity for each product type during the production simulation period, an input lot history information storage unit 2 that stores history information of past input lots of the production line that is the target of the production simulation, Production is performed from the lot size distribution calculation unit 3 that obtains the history information of the input lot from the input lot history information storage unit 2 and calculates the lot size distribution for each product type, the input quantity information setting unit 1, and the lot size distribution calculation unit 3. The information on the lots to be input is received, and the number of lots to be input and the number of lots for each day and for each product type are calculated from the distribution of the total input quantity for each product type and the lot size for each product type during the production simulation period. Input lot information setting unit 4 for creating and setting production plan information including input lot information having a function of setting From the master data storage unit 5, which stores master data including process procedure information, equipment operation information, and dispatching rules necessary for the target production simulation, the input lot information setting unit 4, and the master data storage unit 5. It comprises a production simulation model creating section 6 which receives information and data and creates a production simulation model, and a production simulation executing section 7 which executes a production simulation using the model created by the production simulation model creating section 6 as an input.

Next, the operation will be described.

First, a simulation executor sets the input quantity for each product type during the simulation period by using the input quantity information setting unit 1. FIG. 2 is an explanatory diagram illustrating an example of data set by the input quantity information setting unit. FIG. 2 shows an example of setting the input quantity from January 1 to January 31, 1994 for each product type. The input quantity information setting unit 1 cannot set the lot composition.

Next, the input lot history information storage unit 2 stores the history information of past input lots of the production line to be simulated. FIG. 3 is an explanatory diagram illustrating an example of data set in the input lot history information storage unit. Figure 3
Then, from December 1, 1993 to December 31, 1993 for each variety
An example of history information of input lots up to the day is shown, and one horizontal row constitutes one lot of information. As the contents of the history information of the past input lot, the lot number.
・ Product name, input line, input date / time, planned storage date / time, input quantity, etc. can be considered.
Only the product name, input date and time, and input quantity are displayed.

Next, based on the history information of past input lots of the production line to be simulated, which is stored in the input lot history information storage unit 2, the lot size distribution calculating unit 3 is used to make lots for each product type. Calculate the size distribution. FIG. 4 is an explanatory diagram illustrating an example of lot size distribution data for each product type. In FIG. 4, the horizontal axis represents the lot size, and the vertical axis represents the ratio of the number of lots of the target lot size to the total number of lots. It should be noted that this lot size distribution exists for the number of product types that appear in the target production simulation. Further, the lot size distribution calculation unit 3 is provided with a function that allows the simulation executor to edit the lot size distribution for each product type as needed.

Next, based on the input quantity for each product type within the production simulation period set by the input quantity information setting unit 1 and the lot size distribution for each product type calculated by the lot size distribution calculating unit 3. By using the input lot information setting unit 4, the input lot information including the number of input lots and the lot size for each type of product for each day is automatically developed using a method such as generating a random number. FIG. 5 is an explanatory diagram for explaining an example of the input lot information expanded and set by the input lot information setting unit. FIG. 5 shows an example of input lot information composed of the number of input lots and lot size for each product type from January 1st to January 31st, 1994. One horizontal row indicates one lot. It constitutes the information of. The input lot information setting unit 4 is provided with a function that allows the simulation executor to edit the input lot information as needed.

Next, the production lot information including the production lot number and the production lot number, which is set by the production lot information setting unit 4 and is composed of the production lot number and the lot size for each type of product for each day, is input. At the same time, the production simulation model creation unit 6 creates a production simulation model by using the process procedure information, the equipment operation information, and the master data configured by the dispatching rule stored in the master data storage unit 5. The production simulation execution unit 7 executes the production simulation.

The master data, which is stored in the master data storage unit 5 and is composed of the process procedure information, the equipment operation information, and the dispatching rule, can be existing data or can be generated by using other means.

[0019]

As described above, according to the present invention, the lot size distribution for each product type is calculated based on the history information of past input lots of the production line to be simulated, and the lot size distribution and simulation for each product type are calculated. Using the input quantity for each product type within the period, it is possible to automatically develop the input lot information for each product type for each day within the simulation period so that the simulation executor can edit it if necessary. By doing
This has the effect of reducing the time and effort required for the simulation executor to create the production plan information.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an example of data set by an input quantity information setting unit.

FIG. 3 is an explanatory diagram illustrating an example of data set in an input lot history information storage unit.

FIG. 4 is an explanatory diagram illustrating an example of lot size distribution data for each product type.

FIG. 5 is an explanatory diagram illustrating an example of input lot information that is expanded and set by a input lot information setting unit.

FIG. 6 is a block diagram of a conventional production simulation device.

[Explanation of symbols]

 1 input quantity information setting unit 2 input lot history information storage unit 3 lot size distribution calculation unit 4 input lot information setting unit 5 master data storage unit 6 production simulation model creation unit 7 production simulation execution unit 8 production simulation device

Claims (2)

[Claims] 1. An information setting unit for outputting the number of input lots for each predetermined day and each product type and the quantity for each lot as lot information, and a production plan including the input lot information for receiving the lot information from the information setting unit. Input lot information setting unit for creating and setting information, master data storage unit for storing master data including process procedure information, equipment operation information, and dispatching rules necessary for the target production simulation in advance, and the input A production simulation model creation unit that receives information and data from the lot information setting unit and the master data storage unit to create a production simulation model, and a production simulation that executes a production simulation using the model created by this production simulation model creation unit as an input. Production simulation with execution unit In the device, the information setting section is replaced with a quantity input setting section for setting the total quantity input for each product type during the production simulation period and a lot size distribution calculating section for calculating the lot size distribution for each product type. The input lot information setting unit calculates the input lot number and the lot number for each day and for each type from the total input number for each type and the distribution of the lot size for each type within the production simulation period, and inputs the lot information. A production simulation apparatus having a function of setting the. 2. An input lot history information storage unit for storing history information of past input lots of the production line which is the target of the production simulation, as an information input source of the lot size distribution calculation unit. Item 1. The production simulation device according to item 1.