I. INTRODUCTION
As manufacturers gain control over inventory and grab accurate demand signals from their customers, the last blind spot in the global supply chain is the plant floor[1] Due to the lack of necessary manufacturing field data, many general scheduling algorithm such as genetic algorithm (GA), ant colony algorithm (ACA), neural network algorithm (NNA) and particle swarm algorithm (PSA) can't be effectively applied to discrete plant shop. It is still a difficult problem for factory managers to monitor, control and optimize manufacturing process in a real-time manner.