Designing a Multi-site Production Planning System for Wafer Fabrication

This paper proposes a production planning system for a semiconductor enterprise with multi-site fabs. Profit achievement of the whole enterprise and quick response mechanism for the due date setting are the major considerations of the proposed system. Two modules are included in this system. Throughput planning module considers the achievement of enterprise’s profit, operating characteristics of each fab site and cycle time impact to each level of orders. With this module, the proper production quantity and product mix for each fab is derived so as to achieve enterprise’s profit target. Then, job-order planning module is applied for order allocation and due date setting. Rapidly distributing customers’ orders to each proper site and responding reliable due date to customers are the main functions of this module. A simulation experiment is performed to demonstrate the effectiveness and efficiency of the proposed system.