基于双层规划的农资供应链覆盖率优化

Optimization of Agricultural Productions Supply Chain Coverage Based on Bi-level Programming Approach

摘要:

结合农资供应链的特点确定农资供应链工厂的数量、位置、规模和分配，构建双层规划模型。该模型以顾客覆盖最大化为基础、选址总利润最大为目标，引入时间和距离的敏感度变量以反映客户在选择供应商时对运输距离和产品价格的敏感程度，优化农资供应链工厂对分销商的覆盖率问题.上层从决策者出发，以工厂利润最大为目标；下层从顾客角度出发，考虑市场竞争，以对分销商的最大覆盖率为目标.将模型应用于具体农资企业，用遗传算法求解模型，验证模型的有效性.

Abstract:

A bi-level programming model is constructed in combination with the characteristics of agricultural materials supply chain to determine the quantity, position, size and distribution of agricultural materials supply chain factory by maximizing the customers’ total profits. Sensitivity variables of time and distance are introduced to reflect the sensitive degree when customers select suppliers for transportation distance and product price. The coverage of agricultural materials supply chain is optimized by the model. The target of the upper level of the model is to maximize the profit by taking the deciders’ interests into account. The lower level of the model，where the customers’ interests are considered，aims to maximize the coverage in the competition environment. A case study of the model in an agricultural company on the basis of the genetic algorithm proves the model to be effective.