A rule based flow control plan for management of work-in-process

The authors describe development of an integrated movement handling and work-in-process management system of an automated storage and retrieval system that is used as the material handling system for a highly automated electronic card assembly line. The line is designed for high-volume assembly of surface mount technology electronic boards. Use of an automated storage and retrieval system for work in process movement provides an opportunity for centralized management of work in process. This is a significant capability in light of the perishability of work in process, which is complicated by the highly stochastic nature of the robotic tools employed. The system developed is a rule-based system that seeks to smooth production, minimize spoilage problems, and reduce the burden of the material handling system under heavy traffic conditions