Research On Equilibrium Decision Of Supply Chain Network Based On Newsvendor Model

With the rapid development of the economy,enterprises have realized the importance of supply chain management based on the background of supply chain and supply chain competition.The development and progress of enterprises cannot be separated from the support of supply chain management.Supply chain management is the core of enterprises growing stronger and bigger,and it can also optimize their production,sales,and other processes of enterprise operations.From the perspective of supply chain network optimization,this thesis considers the maximization of the benefits of the entire supply chain and uses game theory,network equilibrium theory,variational inequality,and other theories to conduct an in-depth analysis of the competition and cooperation between firms based on the background of supply chain and supply chain competition.Based on a comprehensive review and analysis of the research on the supply chain network equilibrium model at domestic and abroad,the following aspects of research work are completed:(1)Under uncertain demands,a two-echelon supply chain network based on the newsvendor model is developed.The supply chain network is composed of raw material suppliers,product manufacturers,and demand markets.It is the first time that the newsvendor model is introduced into the supply chain network equilibrium model for uncertain demands,which is used for the production and price decisions of the manufacturers in the supply chain network.A newsvendor model-based variational inequality is constructed to express the equilibrium condition of the supply chain network under uncertain demands.Some basic algorithms for solving the variational inequality are given,including the modified projection algorithm and projection shrinkage algorithm.(2)Based on the background of the competition between supply chains,the thesis establishes a centralized supply chain network equilibrium model based on the newsvendor model under the conditions of uniform and normal distributions of demands.In terms of game theory,network equilibrium theory,and variational inequality,this thesis analyzes the decision behavior of each level in the supply chain network,including raw material suppliers,product manufacturers,and demand markets.Then,this thesis establishes the supply chain network equilibrium condition based on the newsvendor model under the condition of uniform and normal distributions of demands.Finally,a numerical example is given to analyze the impact of different variances on the traffic and retail prices of the entire supply chain network under the condition of uniform and normal distributions.(3)Given that the fluctuation of demands will directly affect the normal operation of the consumer market when examining the competition between supply chain and supply chain,the macro-control link of the consumer market in the form of price tax is introduced.In terms of game theory,network equilibrium theory,two-level planning theory,and variational inequality method,a supply chain network equilibrium model based on the newsvendor model is established under government tax regulation when demands are evenly distributed.Next,a supply chain network equilibrium model based on the newsvendor model under government tax regulation is also developed when demand is normally distributed.Then,the penalty function algorithm is given to solve the model.Finally,considering the normal distribution of demands,a numerical example is introduced to illustrate the influence of tax regulation policies of the government on supply chain network equilibria.