Production planning method and production planning system in a production line having a rework process

摘要

Embodiments of the invention provide a computer-aided production planning method and system for accurately and quickly drafting a production plan for a given period for a production system employing a production line with a salvage process. In one embodiment, the method includes a new parts supply quantity recalculating step of recalculating the quantities XSUBi,j /SUBof parts to be newly supplied based on obtained actual product yields BSUBj/SUB, actual production process total supply quantity ratios CSUBi,j/SUB, actual production process salvage ratios DSUBi,j/SUB, the requested quantities ASUBj /SUBof finished products, and correction parameters FSUBi,j /SUBfor the actual production process total supply quantity ratios CSUBi,j/SUB; and a production process load determining step of, to draft a production plan for a given period, determining the load on each production process of the production line on each day based on the quantities XSUBi,j /SUBof parts to be newly supplied in such a way that the requested quantities ASUBj /SUBof finished products can be produced, the quantities XSUBi,j /SUBbeing recalculated at the new parts supply quantity recalculating step.