In this paper,we frist establish a free shipping optimal model for the least order size from the Supplier＇s perspective in a supply chain with one supplier and multiple retailers,then we develop an algorithm to find the optimal solution and theoretically analyze the condition under which the free shipping strategy can be used,and the numerical examples are presented in the end.%在一个供应商和多个零售商的供应链中,本文从供应商角度针对最小免运费订货策略建立了优化模型,并通过理论分析给出了求解方法及免运费策略的适用条件.最后,通过算例对最优免费送货策略的有效性进行了验证.
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