Research On The System Dynamic Model Construction And Simulation Of Closed-loop Supply Chain For Electronic Products

Since the 21 th century,traditional supply chain of fresh produce Since the 21 st century,with the continuous improvement of research and development capabilities as well as the gradual progress of human living standards,consumers' consumption power and concepts have undergone tremendous changes.The demand for personalized and diversified electronic products is increasing,driving the speed of product replacement,resulting in a shortened life cycle of electronic products.However,the number of abandoned electronic products has also increased dramatically,it has been followed by serious Resource waste and environmental pollution problems.In this context,the closed-loop supply chain of electronic products has emerged as a new management model that conforms to the trend of the times.In the actual operation process of the closed-loop supply chain of electronic products,people find that the complexity,uncertainty and self-determination of members have caused many problems such as difficult management and poor performance of closed-loop supply chain.The effective contract coordination mechanism can clearly define the rights and responsibilities of members of the closed-loop supply chain of electronic products in the form of contracts,and promote cooperative cooperation,long-term cooperation,sharing information,sharing risks,and achieving mutual benefit and win-win.Therefore,contract coordination research has become a hot spot of academic,business and government attention.Based on the characteristics of electronic products,this paper constructs a system dynamics model of two kinds of progressive relationship of closed-loop supply chain of electronic products and closed-loop supply chain of electronicproducts with repurchase contract.The specific modeling process is as follows:firstly,the model boundary,description and assumption conditions are expounded,and the mutual causal relationship of the model body is analyzed,the corresponding causal circuit diagram is drawn,and then,the structural flow diagram is drawn with reference to the causal loop diagram,all the equations of the model are written according to the variable causality and the constant parameters are established.Finally,it is verified whether the model is reasonable through dimensional consistency and other methods.This paper uses Vensim PLE software for simulation analysis.Firstly,it explores the impact of recycler behavior on the profit of closed-loop supply chain of electronic products.Then it conducts in-depth research on the closed-loop supply chain system dynamics model of electronic products based on repurchase contract,and selects different backs.Purchasing contract parameters systematically analyze their respective profit changes from the perspective of the closed-loop supply chain of electronic products,manufacturers,sellers and recyclers,and provide reference for decision-making of all member companies within the closed-loop supply chain of electronic products.According to the simulation results,the results are summarized as follows:(1)In the closed-loop supply chain of electronic products,the recycling behavior of electronic recyclers can improve the overall profit of the closed-loop supply chain,and the profit level of electronic sellers is not affected as the proportion of recycling increases.The profits of electronics manufacturers,recyclers and closed-loop supply chains has accelerated.When the recycling ratio increased to the threshold,the profit growth rate of electronic manufacturers gradually decreased,while the profits of electronic recyclers and closed-loop supply chains showed a negative growth.(2)The repurchase contract can effectively adjust the relationship between members of the closed-loop supply chain of electronic products,and the higher the repurchaserate promised by the upstream members to the downstream members,the greater the profit of the closed-loop supply chain of electronic products and the profits of each node enterprise.When the repurchase rate reached the threshold,the overall profit of the closed-loop supply chain of electronic products showed a high growth.(3)In the closed-loop supply chain of electronic products implementing the repurchase contract,the electronic manufacturer needs the longest coordination time,the electronic seller has the largest profit,and the electronic recycler has the lowest profit,but as the repurchase rate increases to the threshold,Electronic recyclers have the biggest room for profit improvement.In addition,the difference in the parameters of the repurchase contract will result in different adjustment effects on the closed-loop supply chain of electronic products,and the repurchase contract will not produce adjustment effects in the short term,and the short operation time may make the adjustment effect poor.Finally,based on the simulation conclusions,the author proposes a series of proposals for the development of China's closed-loop supply chain of electronic products from the perspectives of government,electronics industry and electronic enterprises.