Lot Splitting in Unbalanced Production Systems*
研究了非平衡生产系统中批量拆分的影响，发现利用非瓶颈工位增加换产次数可提升效率，而增大平均加工批量会阻碍操作重叠，降低批量拆分缩短流程时间的效果。
ABSTRACT This research investigates the impact of lot splitting in unbalanced production systems, under a variety of experimental conditions. Scheduling policies specifically designed for use in the presence of a long‐term bottleneck, a condition frequently encountered in practice, are developed and tested. Results indicate that when steps are taken at nonbottleneck work centers to capitalize on capacity imbalances through increasing the number of setups and, hence, the variety of products produced, shop effectiveness is improved. The results also indicate that scheduling policies that tend to increase the size of the average process batch retard the overlapping of operations, which is critical to the success of the lot‐splitting methodology in reducing flow time. Finally, it is shown that increasing capacity at nonbottleneck work centers along with implementation of effectiveness‐oriented scheduling polices leads to improved shop performance.