Production planning system

Abstract

The production of semiconductor devices manufactured through a plurality of manufacturing sites is unitarily managed and an appropriate production plan is instructed. A computer projects a production plan of an entire company from necessary information such as a planning and finishing volume and a day's schedule of each of the manufacturing sites, each item and each process for satisfying a demand estimation of a product, order information on the product, and a product volume required to be manufactured which information are collected from a customer computer and a production management computer and the like. The production plan is provided to each manufacturing site as a production instruction and provided to each business person or customer as a storing reply or an order accepting period reply. If the projected production plan (possible production volume) does not coincide with a production plan (necessary production volume), parameters obtained by correcting production allocation, production capability, lead time, yield and the like are re-input from a parameter input terminal. Based on the corrected parameters, the computer re-projects the production plan and projects an optimum production plan.

Dependencies are inferred from the claim text.