TFT-LCD 제조라인에서의 자재취급요청 주도형 생산 시뮬레이션 모형

The up-to-date market dynamics make effective production simulation pose greate challenges to the TFT-LCD industry. However, existing approaches to production simulation for TFT-LCD fabs have certain limitations resulting from restrictive implementation of material handling processes, even though dynamic material handling flow occasionally causes a bottleneck of production. To build an effective production simulation model, dynamic material handling flows should be incorporated into the simulation model. This paper proposes a material handling request-driven production simulation model for a TFT-LCD fab that implements dynamic material handling behavior. The simulation model conforms to a discrete event simulation framework and it is driven by material handling request events thrown by processing equipments. In this paper, a reference model for the material handling behavior and an event graph-based behavior model, that emulates push and pull flows of parts simultaneously, are also presented.