在前面定性分析基础上，分别建立生产型企业和销售型企业有需求提前期的库存优化模型，得出成本决策变量的最优解。
Based on the above qualitative analysis, it constructs an inventory optimizing model for manufacturer and storing company respectively, fingers out an optional result of the cost decision variable.
只有把人情做在前面，提前编织好自己的人情网，到时才能好办事、办好事。
As long as they do it in advance to successfully weave their networks of relations, they will be able to handle affairs easily in time.
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