科研之友
微信
新浪微博
Facebook
分享链接
摘要
The twin-fab concept has been established over the past decade due to considerations of cheaper facility cost, faster installation and more flexible productivity management. Nevertheless, if lacking in completed backup policies, the benefits of twin-fab will decrease significantly, particularly in production flexibility and effectiveness. In this work, the control policy of capacity support is established and two control thresholds are developed. The first is the threshold of Working in Process (WIP) amount, which acts as a trigger for backup action. The concept of protective capacity is applied to set this threshold. In order to endorse the effectiveness of WIP transfer between twin fabs, the threshold of WIP amount difference (WDTH) is set as a control gate. The design of WDTH is to maximize the expected saved cycle time. The GI/G/m model is applied to develop equations for the calculation of expected saved time. Finally, the capacity support policy is validated by a simulation model. The results show that this policy is both feasible and efficient.
- 出版日期2014
