Production planning system and production planning method

A production planning method to be performed in a production planning system that allocates a manufacturing facility for a manufacturing condition, the production planning method comprising:

• a performance rule generating step of generating a performance rule in which the manufacturing condition is set as input and the manufacturing facility is set as output, based on allocation performance data representing a performance of allocating the manufacturing facility for the manufacturing condition;
• a comparison table generating step of generating a comparison table representing a difference between the performance rule and an existing rule in which the manufacturing condition is set as input and the manufacturing facility is set as output;
• a modification rule generating step of generating a modification rule in which the existing rule is modified according to a user operation on the comparison table;
• and
• a rule evaluation step of calculating a main performance evaluation index for production plan data corresponding to each of the existing rule and the modification rule, wherein
• in the comparison table generating step, the comparison table including a modification plan for the existing rule is generated,
• wherein the comparison table generating step displays the comparison table and the evaluation index for the production plan data corresponding to each of the existing rule and the modification rule on an operation screen,
• wherein according to a predetermined user operation on the operation screen,
• the modification rule generating step generates a plurality of modification rules each being obtained by modifying the existing rule,
• the rule evaluation step calculates an evaluation index for the production plan data corresponding to each of the plurality of modification rules,
• the comparison table generating step displays the modification rule having a highest calculated evaluation index among the plurality of modification rules on the operation screen.