Notes: Installation vs. Echelon Stock Policies for Multilevel Inventory Control
比较了多级库存控制中安装点库存策略与阶梯库存策略的优劣，发现阶梯库存策略通常优于安装点库存策略，并指出看板策略是安装点库存策略的一种受限形式。
This paper compares installation and echelon stock policies for multilevel inventory control. The major results are for serial and assembly systems. For (Q, r)-rules, echelon stock policies are, in general, superior to installation stock policies. A Kanban-policy is identified as a restricted type of installation stock (Q, r)-policy.