Research On Supply Chain Decision Before And After Small And Medium-sized Supplier Alliance Considering Supply Interruption Risk

In the context of global procurement,the supply chain network structure is becoming increasingly complex and affected by various internal and external uncertain risk factors.The frequency of supplier interruption risk is greatly increasing.Accordingly,many retail enterprises have established multi-source procurement models and strict supply access standards to deal with the interruption risk,making supply interruption risk management the key for supply side enterprises to obtain competitive advantage,And further intensifies the competition and alliance awareness among suppliers.In addition,small and medium-sized Suppliers account for a large proportion of supply side enterprises,and they have many problems such as insufficient funds and lack of technical knowledge in supply interruption risk management.Therefore,based on the perspective of small and medium-sized suppliers,studying the impact of different supply interruption risk management strategies on the supply chain before and after the alliance not only enriches the research on supply interruption risk management and supply chain alliance,but also guides small and medium-sized suppliers to adopt reasonable competition and interruption risk management strategies to improve their competitiveness.Based on the above background,this paper first expounds the literature research status related to the topics of supply interruption risk management,supplier competition and supply chain alliance.Secondly,it introduces the operation mechanism of the supply chain under the two supply interruption risk management strategies before and after the alliance,including the two strategies of reducing the interruption risk,including introducing the third-party enterprise to invest in the supplier and building the technical knowledge sharing alliance.Then it studies the supply chain decision-making problem corresponding to two small and medium-sized supplier enterprises adopting different interruption risk management strategies before and after the alliance.The supply chain is composed of a single retailer and two small and medium-sized suppliers with different interruption risk probabilities.Based on the model that suppliers do not adopt strategies when they are not in the alliance,The Stackelberg game method is used to solve the optimal pricing,procurement and profit decisions of the supply chain corresponding to the non alliance of suppliers(including the benchmark model,the interruption risk reduction model of a single supplier and the interruption risk reduction model of both suppliers)and the horizontal alliance(the interruption risk reduction model of technical knowledge sharing among alliance subjects),Through model analysis and numerical simulation with the help of MATLAB software,it is obtained that the impact of price on purchase quantity is less than that of supply interruption risk on purchase quantity;When and only when the investment ratio of the supplier with relatively high initial interruption probability cooperating with the third party is within the range of defined value and critical value,it will fully benefit;The initial interruption probability affects the critical value of investment when the supplier cooperates with the third party;Both investment ratio and knowledge sharing coefficient have an "inverted U" effect on supplier profit;Regardless of alliance or not,suppliers with relatively low initial interruption probability always obtain relatively large procurement volume;Suppliers with relatively high initial interruption probability do not always obtain more purchases after alliance than before alliance;Both suppliers cooperate with the third party to reduce the interruption risk,which is slightly better than the supplier’s strategy of building a knowledge sharing alliance to reduce the interruption risk.According to the research results of the model,reasonable management suggestions are provided for supply chain members: the strategy of reducing interruption risk is better than the price reduction strategy to a great extent;The investment ratio decision of cooperation between suppliers and third-party enterprises and the knowledge sharing coefficient decision of supplier alliance must be within a certain threshold range;The choice of competition and alliance strategy should comprehensively consider the information of itself,competitors,suppliers and all parties in the supply chain;Retailers should actively guide the formation of alliance relationship among suppliers.