Research Of Location Routing Problem Based On A Co.Ltd's Logistics Network

The rapid development of e-commerce in China has promoted the reform of the traditional retail industry,and has also changed the development of the logistics industry accordingly.The development of warehouse integration has become an important measure to solve the bottleneck of major e-commerce logistics enterprises.With the deepening of the warehouse allocation integration model,e-commerce logistics will develop a new cloud warehouse model.In the logistics network construction of warehouse integration,the first thing to be solved is the construction of the overall network structure,which involves the design of the network level,the location of warehouses and the planning of routes.This thesis takes the construction of logistics network of logistics enterprises under the environment of warehousing-integration,dealing with the location of warehouses and the corresponding routing problems.These two problems were often decided independently,but these two are interdependent.Studies have shown that if they are handled separately,the overall system cost may be too high.Location-Routing-problem integrates two decisions and constrains them as a whole to maximize the overall planning outcome.Based on the relevant theoretical knowledge of location-routing problem,this thesis studies the mathematical model with the lowest overall logistics cost as objective function based on specific characteristics of actual problem of A enterprise.The model is validated by CPLEX programming software.Heuristic algorithm based on different neighborhood structure of network point and the warehouse point is designed based on the model feature.The C++ programming language is used to write the complete planning program and the validity of the example analysis and verification algorithm is combined.The experimental operation data results are used to provide reference for the A enterprise logistics network planning.In addition,this paper also compares the different planning results when the timeliness of logistics and distribution is the goal,The two different results provide a reference for enterprises to improve overall logistics network.