Research On Supply Chain Network Equilibrium Considering Inventory Constraint Under Uncertain Demand

With the development of supply chain management theory,the traditional supply chain,only considering the maximization of their own economic interests without regard to social benefit and environmental benefit,has been difficult to adapt to the development needs of the times.in recent years,the research of closed loop supply chain has been paid much attention by experts and scholars both at home and abroad.Previous studies are often for the problem of supply chain network equilibrium only considering inventory constraints or only under demand uncertainty,while the studies both considering the two problems are not deep enough,therefore,Therefore,this paper studies the closed-loop supply chain network equilibrium model in the case of two parties,which is not only innovative,but also of theoretical significance.Considering the manufacturer inventory constraints,this paper studies the closed-loop supply chain network equilibrium model under uncertain demand.At first,the paper builds the three layers of closed-loop supply chain composed of manufacturers,retailers and consumers in the consumer market,then introduces of time parameter t to construct the function of consumer demand,sets up equilibrium condition of closed loop supply chain by using the improved variable inequalities and draws a conclusion through an example analysis.On this basis,considering the influence of consumers' demand on the actual situation,we build the expected demand function of consumers under stochastic demand,and use the same method to ana lyze the simplified model,and draw the conclusion.This paper draws the following conclusions:(1)In the closed loop supply chain,consumers sell the waste products voluntarily under the recycling incentive,making the number of waste products that producers can use increase.This not only alleviates the dependence of producers on raw materials,but also saves resources.(2)When the inventory volume of the manufacturers increased slightly,although the inventory cost increased,the profit growth could be achieved by adjusting the quantity of raw materials purchased and the amount of recycled waste.When the inventory volume of the manufacturers increased sharply,the single adjustment of raw material procurement quantity has been unable to control their larger costs,large inventory will have a serious impact on the profits of enterprises,even cliff profits drop,so we should adopt effective measures to optimize inventory management;(3)When manufacturers' inventory first meets market demand,it can change the market supply and demand change to a certain extent,and make consumers' psychological expectation demand price fluctuate,and the two have mutual influence.(4)the change of the manufacturer's profit is positively related to the change of market demand and negatively related to the change of its inventory.So manufacters need one hand carry out a reasonable inventory control,on the other hand do the market demand forecast price or demand forecast to enhance their profit.