By analyzing the relations of two? Echelon inventory level and customer random demand at stores this paper gets optimum order policies.
通过对两级库存水平之间及它们与客户随机需求变量之间的关系分析，我们得到了最优的订货策略和最优的运输频率。
It can lead to tremendous inefficiency for the supply chain, consequently followed by excessive inventory, imbalance between demand and manufacturing capacity, and reduction of customer service level.
长鞭效应会造成供应链系统的无效运作，从而导致存货过多、生产预测出现误差、产能失衡、顾客服务水平下降等等。
It inputs parameters such as lead time, customer demand inventory replenishment interval of the horizontal level of service and inventory costs. And some conclusions are drawn.
研究仿真模型的输入参数如订货提前期、客户需求间隔对横向补货库存系统服务水平、库存成本的影响，得到一些结论。
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