Design And Coordination In Logistics Service Supply Chain Based On Reliability Analysis

The rapid development of service economy brings tremendous changes to the modes of production, consumption and trading in our society. Confronted with growing complex environment of competition, enterprises switch from a supplier-leading, static, simple market environment to a customer-driven, dynamic and complex one, which requires extended service chains, constantly strengthened professiorialization, guaranteed service reliability, perfect service modes. As a new direction and major branch of service supply chain, logistics service supply chain is shaped with the constant development of the logistics services industry, and featured of demand uncertainty and low stability which indicates that the reliability of all nodes must be guaranteed to secure its coordinated operation. The selection of members and the coordination of capacity is the key to logistics service supply chain. This thesis attempts to study the above questions from the following perspectives based on the reliability theory.(1) Research on the basic theory of logistics service supply chain. Based on the analysis of the causes and problems of the outsourcing in logistics service, this thesis makes an in-depth exploration of the evolution, dynamics, members, structure and characteristics of logistics service supply chain, providing a theoretical basis for the following chapters. Based on the demands of customs, the logistic service chain centers on logistics service integrator and ensures logistics operation of product supply chain by controlling the service, logistics, capital and information. It is a new supply chain with added value resulting from the transformation of functional logistics service providers to the demanding side.(2) Research on the reliability of logistics service supply chain. On the basis of the definition of reliability, the thesis analyzes the reliability of the nodes and structures of the logistics service supply chain. By analyzing the internal and external factors, the paper studies the reliability of logistics service supply chain based on Markov process and gives an example. The indicators of reliability can be calculated. From the indicators, the influence of all members of the logistics service supply chain is obvious. It plays an important role in improving the reliability of logistics service supply chain.(3) The selection of logistics service integrator. The thesis has analyzed the influence factors of logistics services integrator selection, built a three-level evaluation system, and used the gray multi-level method for the logistics service integrator selection. The weight is given to three-level evaluation system. Then, rating scale, scoring standards and sample matrix are fixed. By calculating the gray evaluation factor, the weight vector and weight matrix, and then a comprehensive evaluation of each alternative logistics service integrators can be got. According to the value of comprehensive evaluation and sorting, we can get the final result.(4) Quantification of functional logistics service providers. The thesis builds a nonlinear integer programming model. The objective function is to minimize costs and the constraints are to ensure the reliability of chain no less than the minimum chain reliability. For this model, a design of a hybrid algorithm based on sequential quadratic programming and branch and bound, which firstly doesn't take the integer problem into account, adopting the sequential quadratic programming method for solving the global optimal solution of nonlinear problems. If the global optimal solution is integer solution, it can stop caulculating. Otherwise, it can start from the global optimal solution, using branch and bound method, branching, pruning, to solve the original problem. At the same time, example is given to verify the feasibility and effectiveness.(5) The coordination of capacity of logistics service supply chain under the buyback contract. In the thesis, it studies the coordination of capacity based on uncertainty demand, buyback contract and the reliability of suppliers. Considering two coordination strategies, those are competition, alliances strategy and stackelberg strategies. It can get the optimal buyback price, the order quantity of logistics capability, the expected profit for logistics service integrators, the expected profit for functional logistics service providers and the expected profit for logistics service supply chain. Through a numerical simulation, the influence on various indicators can be seen when the reliability, the purchase price and the punishment cost change.(6) The coordination of capacity of logistics service supply chain under the revenue sharing contract. The thesis researches the coordination of capacity based on uncertainty demand, revenue sharing contract and the reliability of suppliers. It analyzes the optimal coefficients, the order quantity of logistics capability, the expected profit for logistics service integrators, the expected profit for functional logistics service providers and the expected profit for logistics service supply chain under the competitive and alliances strategy. Compared with the buy back contract model, the conditions when the two are coordinated to achieve the same results are obtained. Finally, through a numerical simulation, the influence on various indicators can be seen when the reliability, the purchase price and the punishment cost change. At the same time, it is compared with the related changes under buy back contract.