This paper deals with a planning problem for reentrant hybrid flow shop with serial stages consisted of parallel machines. In a reentrant operation, a product may revisit some stages several times and then it may cause the congestion of work in process (WIP) or equipment idleness. Preemptive goal programming based heuristics are proposed to maximize of throughput and to minimize of delayed customer demands in the hybrid flow shop.

Abstract
 1. Introduction
 2. Problem description
 3. Solution approach
 4. Example
 6. Conclusion
 References

• Hang-Min Cho(Hanyang University)
• In-Jae Jeong(Hanyang University)