Are Base-Stock Policies Optimal in Inventory Problems with Multiple Delivery Modes?
研究了多交货模式下的周期性库存模型，发现只有最快两种交货模式存在最优基准库存，并通过反例证明其他模式不适用基准库存策略。
We present a periodic review inventory model with multiple delivery modes. While base-stock policies are optimal for one or two consecutive delivery modes, they are not so otherwise. For multiple consecutive delivery modes, we show that only the fastest two modes have optimal base stocks, and provide a simple counterexample to show that the remaining ones do not. We investigate why the base-stock policy is or is not optimal in different situations. This note is an abridged version of Feng et al. (2006).