Optimization Model of Closed Loop Supply Chain Based on System Dynamics and Graph Theory

Abstract

In order to assist in the reverse recovery decision of emergency logistics in sudden natural disasters, this paper conducts the system modeling on the reverse recovery of reusable materials in several disaster areas from the perspective of system dynamics under the principle of rescue satisfaction preference. Through the comprehensive analysis of material demand of disaster areas, the occupancy of resources in reverse recovery and other factors, it establishes the function relation between the recovery frequency and rescue satisfaction, and simulates the system model with the system dynamics software Vensim. Finally, the effectiveness and practicability of the model is proved by an example, based on which the impact of transportation resource change on rescue satisfaction is analyzed. Based on the above research conclusion, this paper provides the decision support and countermeasure for the emergency reverse logistics in China.