Planned Lead Times in Multistage Systems
通过模拟多种制造环境，研究了计划提前期对客户服务水平和库存投资的影响，发现缩短计划提前期会损害服务且节省库存有限，小幅延长则能大幅改善服务。
ABSTRACT This study investigates the impact of planned lead times on performance in multistage manufacturing where material requirements planning is used in a make‐to‐stock environment. We simulate a variety of different operating environments and find: (1) planned lead times are important to customer service levels under all operating environments examined, but have a smaller impact on inventory investment; (2) tight due dates introduced by short planned lead times hurt customer service without saving much inventory; (3) small increases to tight planned lead times improve customer service substantially with small inventory increases; (4) co‐component inventories change with planned lead times, and disparity between such inventories is a sign of poor timing coordination; (5) the fixed order quantity rule performs better than the periodic order quantity rule; and (6) tall product structure and large lot sizes require particular attention to planned lead times. The findings also extend the current understanding of planned lead times by including uncertainties such as forecast error, yield loss, and equipment reliability. The study concludes with a way to diagnose and improve poorly set planned lead times.