Production method and a production system

A method of mixedly producing a plurality of types of works with a block division type of production system including production lines arranged in parallel, each effecting a predetermined process, said method comprising the steps of:

• (a) dividing requests for a plurality of types works in a production unit on the basis of production timings in the case that a plurality of types of works are produced;
• (b) obtaining the number of lots of each type of said works at each production timing and supplying the number of lots of each type of said works at each production timing as a division production command to said first production line;
• and
• (c) at each of said production lines, storing said lots of each type of said works processed at each of said production line in a mixedly transferring depot;
• and
• (d) at one of production lines following to each of said production line, generating a production plan on the basis of the number of lots of each type of said works stored in said mixedly transferring depot, and processing said lots of each type of said works on the basis of said plan.