Unique control priorities for parallel machines in high-variety manufacturing
研究了高品种制造中多台并行机器可各自设定独特控制优先级的机制，发现结合切换与聚焦机制虽平均性能最优但会严重延迟大加工时间订单，而仅用双聚焦机制可避免此问题且平均性能仍具竞争力。
Previous literature on high-variety manufacturing developed various control policies that include a ‘shift mechanism’ that changes the control priority during periods of low and peak demand. Embedded in priority rules or release methods, this shift mechanism is developed in a setting with a single capacity source, making the need to shift between control priorities necessary. However, when there are multiple capacity sources – for example, by identical parallel machines – we can use a ‘dual focus mechanism’, where each capacity source can have its unique control priority, regardless of demand levels. Using discrete event simulation, we find that the combination of shift and focus mechanisms leads to the best average performance. But this is at the expense of an extreme delay for orders with large process times, which can be prevented by a control policy that uses a dual focus mechanism only, whilst still realising competitive average performance.