Key Laboratory of Transport Industry of Big Data Appalication Technologies for Comprehensive Transport,Beijing Jiaotong University,Beijing 100044,China
To address the “empty-backhaul” problem that occurs after delivery vehicles unload at vehicle-assembly plants, this paper constructs a space-time network to depict the parts-allocation processes among city distribution centers and assembly plants. An optimization model for parts-allocation strategies is developed with the objectives of minimizing transportation, inventory, and total costs, and a numerical example is solved using real enterprise data. The results show that, compared with the existing allocation plan, the optimized solution reduces the resource waste caused by empty return hauls, improves vehicle utilization, and significantly lowers total cost.
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