Concepts, Theory, and Techniques A JOINT LOT‐SIZING RULE FOR FIXED LABOR‐COST SITUATIONS
针对固定人工成本情境，提出利用可用产能增加生产准备次数、减少批量库存的联合批量规则，并通过约翰迪尔发动机工厂的调度问题验证其有效性。
ABSTRACT Many American firms are implementing just‐in‐time production in order to minimize inventories, reduce flow time, and maximize resource utilization. These firms recognize that, in the short run, setup costs really are fixed expenses and it is available capacity which is the critical factor in determining production‐run quantities. We propose using available capacity to increase the number of setups and reduce lot‐size inventories. This results in improved relevant cost performance. Sugimori, Kusunoki, Cho, and Uchikawa [16] in their paper on the Toyota kanban system developed a relationship for lead time but failed to use it for lot sizing. We use this relationship to develop the joint lot‐sizing rule. The efficacy of our proposed rule is demonstrated by applying it to lot‐size scheduling problems at the John Deere Engine Works [14]. Extensions of the proposed rule to undercapacity situations with material‐wastage costs in the setup processes and to multistate production inventory systems also are discussed.