Customer-Order Information, Leadtimes, and Inventories
研究客户提前通知需求（需求提前期）对库存系统的影响，发现简单策略能有效甚至最优地利用该信息，且需求提前期改善性能的方式与补货提前期恶化性能的方式相同。
We have an inventory to manage. The scenario is standard in all respects save one. Instead of arriving unannounced, customers provide advance warning of their demands. How should we use this information, and what is its effect on system performance? The answers turn out to be strikingly simple. There are very simple policies which perform effectively, in some cases optimally. Also such “demand leadtimes” improve performance, in precisely the same way that replenishment leadtimes degrade it.