Research of reverse logistics location and routing problem based on improved particle swarm optimization algorithm

Vehicle routing problem (VRP) and location allocation problem (LAP) of reverse logistics(RL) are synthetically considered. The features of the problem are analyzed. A mathematical model of the problem is constructed. An improved particle swarm optimization (PSO) algorithm based greedy algorithm is proposed. The experiments show that the new algorithm can approach the optimal solutions quickly which proved it to be an efficient method in solving such problem.