Production plan creation system, method, and program

A production plan devising method for formulating a production plan by means of simulating movement of a product in a factory by an event-based simulator through use of a production process model and a production rule, the production plan devising method employing a time-interval-based simulator for computing the status of a production process at given time intervals and a rule generator for automatically deriving the production rule through use of the time-interval-based simulator, the production plan devising method comprising:

• a step for repeatedly devising a production plan over and over again by the time-interval-based simulator;
• a step for applying mechanical learning based on a consecutive optimization technique to the rule generator;
• a step for automatically formulating the production rule;
• a step for using a generated production rule by the event-based simulator;
• and
• a step for formulating a production rule.

A production plan devising program for formulating a production plan by means of simulating movement of a product in a factory by an event-based simulator through use of a production process model and a production rule, the production plan devising program comprising:

• a time-interval-based simulator for computing the status of a production process at given time intervals;
• and
• a rule generator for automatically deriving the production rule through use of the time-interval-based simulator,
• wherein there are performed procedures by means of which the time-interval-based simulator repeatedly devises a production plan over and over again, thereby applying mechanical learning based on a consecutive optimization technique to the rule generator, so that the production rule is automatically formulated and the event-based simulator uses a generated production rule, thereby formulating a production rule.

A production method comprising:

• a step for repeatedly computing the amount of WIP in manufacturing processes by means of a simulator;
• a step for determining a parameter to be used in computation of the simulator such that a computation result of the simulator becomes equal to an allowable range or less;
• and
• a step for controlling the manufacturing processes by a control system on the basis of the parameter.

A program to be performed by a production system, the program comprising:

• a step for repeatedly computing the amount of WIP in manufacturing processes;
• a step for determining a parameter to be used in computation of the simulator such that a computation result of the simulator becomes equal to an allowable range or less;
• and
• a step for controlling the manufacturing processes on the basis of the parameter.