Research On Supply Chains Competition Model And Cooperation Strategy With Resources Allocation

With the speedily growth of economic globalization and the aggravation of market competition, the relationships among enterprises get more closed, which leads to the competition form evolves from the competition among enterprises to the competition among supply chains. At the same time, since its structure becomes more complex, the supply chain has to cope with more uncertain factors. Thus, supply chain managers in nowadays urgently need a set of theories to depict and analyze the competition behaviors among the supply chains with complicated and heterogeneous structures, and to study the strategies in account of disruptive events as well as the corporation strategy among these supply chains.The dissertation is based on the above mentioned background. Firstly, under the assumption of limited resources and homogeneous product, the definition of market chain is used to analyze the competition among supply chains with complicated and heterogeneous structures. The Cournot equilibrium of this inter supply chains competition with resources allocation is formulated as a variational inequality problem. And according to the solution of the variational inequality, it is put forward that how the supply chains are driven by the market demand to integrate production process, allocate interior resources and choose partners. Furthermore, the conditions to ensure the existence and uniqueness of the equilibrium solution of the competition model are also analyzed in the dissertation. The solution algorithms and the numerical example are presented.Secondly, basing on the supply chains competition model developed in the first part, the theory of project dynamic systems is used to establish the dynamic model of the inter supply chains competition with resources allocation, able to depict the dynamic behavior of these supply chains, to solve the problem that the uniqueness of the equilibrium solution is hardly assurable. Furthermore, the monotonic conditions to ensure the stability of the dynamic model are analyzed, following which are the general conditions to judge the stability of the equilibrium. Then, the method to refine multiple equilibrium solutions is proposed from the standpoint of stability.Thirdly, in the context of supply chains competition, the case when there is demand disruption in the plan execution phase is studied, where the supply chain managers need to revise their planned strategy in order to maximize their profit with the new demand under disruption and minimize the cost in adjustment of the original plan. To study such a case, scenarios with and without sale promotion are considered separately, in each scenario ,after depicting the two objectives mentioned above by bi-criteria model, parametric variational inequality is used to establish the equilibrium model of supply chains competition, the existence conditions of whose solution are given next. By comparing the profit of supply chain with and without sale promotion, the effectiveness of promotion in coping with demand disruption can be well analyzed. Furthermore, a numerical example is presented to illustrate the ripple effect of disruptive events in supply chains competition and 121 groups of data are given to prove the effectiveness of sale promotion on demand disruption.Fourthly, the dissertation studies the corporation strategy between supply chains in the context of supply chains competition. Considering a specific supply chain system composed of two supply chains, where the market demand is uncertain but its related information is occupied by each retailer privately. It is quit obvious that several information sharing scenarios exist according to whether the retailers share information or not, in this part, equilibrium decisions of the manufacturers and retailers in each information sharing scenario are deeply discussed. Through the analysis of the effects of horizontal information sharing on the expected payoffs of the firms and the supply chains, it can be excluded that horizontal information sharing won't affect the vertical information sharing strategy for the competing supply chains but can increase the supply chain profits if some special conditions are satisfied. Furthermore, the situations, in which the equilibrium information sharing decision can be seen as a prisoner's dilemma are studied.The dissertation combines the theories and methods in some interrelated fields such as operational research, management science, economies and so on. It integrates optimization theory, games theory, variational inequality theory and projected dynamical systems theory to study the problems of supply chains competition and cooperation with resources allocation. The results have both theoretical value and practical significance to a certain extent.