Time bound control in a stochastic dynamic wafer fab

摘要

Time bounds are a common constraint in wafer fabs. Releasing wafer into a time bound sequence leads to a tradeoff between capacity loss and yield loss due to violations. Two common approaches to tackle this challenge are static scheduling and dispatching rules. While static scheduling faces problems with the dynamic and stochastic nature of a wafer fab dispatching rules often lack the global perspective causing either unnecessary violations or capacity waste. In this paper, we present an approach taking elements of both these solution approaches to address time bound constraints and compare it to existing approaches.