Delivery Vehicle Scheduling Modeling and Optimization for Automobile Mixed Milk-Run Mode Involved Indirect Suppliers

On the issues of that the cost of the milk-run logistics mode with multi-level suppliers is hard to reduce, a mixed milk-run logistics mode involved second level suppliers is proposed in this paper. Based on the cost model in the traditional milk-run logistics mode, the transportation cost influenced by second level suppliers is taken into consideration in the new milk-run logistics mode. An improved genetic algorithm is applied to solve the new milk-run optimization problem. The preliminary comparison results indicate that the proposed mixed mode could provide a more practical method to significantly reduce the cost of logistics for the whole supply chain.