Since the competition time for upstream and downstream customers become increasingly important. Time one of the keys of competition, Shanghai logistics company in order to improve enterprise logistics operation level reaction speed, rapid and timely to meet customer needs, supply and demand both sides often set time range provide logistics services.
In the supply chain between enterprises or between upstream and downstream processes within the enterprise, due to the external environment changes such as logistics service requirements and time range is called logistics operation time window. According to whether to allow delay can be divided into hard time window (not allow delay) and soft time Windows (allow delay); According to different operation links can be divided into the delivery time, harvest time window, traffic time window, etc.
Logistics optimization based on time window class research paper is more, such as: till the time window of the vehicle routing problem optimal solution ", "the customer time window and emergency vehicle scheduling shipments change research, and the time window constraints of full vehicle optimization scheduling algorithm research, interested readers can again in the Intranet search related thesis of" Chinese periodical net "further study.