The Integrated Production Control Method in consideration of the production performance in the Wafer Fabrication Factory
|關鍵字:||晶圓製造;瓶頸機台;投料方法;限制理論;派工法則;Wafer Fabrication;Bottleneck Machine;Order Release Method;Theory of Constraint;Dispatching Rule|
Seeing that there are a enormous amount facilities investment and a high operation capital in wafer fabrication factory. To seek fully utilized of facilities is as important as other production performance measures like due-date, out rate, WIP level, and cycle time. However, there is essential self-contradictory between them like full utilization of all facilities implies without reducing WIP level and cycle time. It is of no advantage to promote out rate and make the system unstable. Therefore, this paper thinks that the level of all facilities' utilization is decided by demands. To keep production smooth and full utilization of the bottleneck machines will make output maximum. Non-bottleneck machines focus on operating in coordination with bottleneck machines and make sure that they have enough materials to avoid them idle. It's good for out rate and keeping WIP and cycle time in low level without blindly seeking facilities fully utilized. Furthermore, it also has an outstanding influence in system performance by order releasing rule. Therefore, this paper brings up an integrated production control method that is based on Theory of Constraint. This method combines releasing plan based on bottleneck, the method of avoiding temporary bottleneck occurring, buffer management, and dispatching rule which is consideration bottleneck and non bottleneck. From the experimental results, not only the capacity constraint resource is fully utilized, but also it has high performance in following measures: average out rate, average cycle time, and average WIP level when applying the developed method.
|Appears in Collections:||Thesis|