Generation system, generation method, and storage medium

A generation system generating a production plan, the production plan being for producing products of a plurality of product types by a plurality of processes using a plurality of production lines, the system comprising:

• an optimization calculation part generating a processing plan by an optimization calculation using first input data, the first input data including a production plan amount of each of the product types and a processing capacity of each equipment, the optimization calculation including an objective function and a constraint condition, the processing plan being of a production plan amount for each of the product types, each of the production lines, and each of the processes;
• an input plan generator generating an input plan by using second input data, the second input data including an input amount of workpieces to each of the production lines for each of the product types, the second input data further including a processing route in the plurality of processes for each of the product types, the input plan being of an input timing of the workpieces to the plurality of production lines;
• and
• a verification part determining an appropriateness of the processing plan and the input plan by a simulation based on the processing plan and the input plan.