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When encountered traffic accident or car failure during use occurs, the owner needs to repair the car, repair process would inevitably have to replace the damaged parts. Therefore, the car manufacturer's service department needs to maintain a certain service parts inventory to meet the maintenance needs of the owners. However, the geographical distribution of car users scattered; traffic accident with car failure is random; owners requesting repair service response time as short as possible, the need for spare parts to be delivered in a timely manner. This requires automobile manufacturing enterprises in close to the owners of the location of the layout service outlets to provide a convenient service. Rapid supply of spare parts to these outlets, automobile manufacturing company with headquarters Spares library headquarters, often market segmentation several regions, each region to set up a spare parts distribution center, distribution the supply of spare parts for the center responsible for the area within the service station. In this way, the car manufacturer's service parts inventory system is composed by many stock agencies distributed inventory system. Recent years, with the rapid growth of the service parts business, which exposed many problems in the management of such a stock system. Found in the analysis on the status quo of the car manufacturer service parts inventory management, the existing inventory management, distribution centers and warehouses of the major region of the main delivery of spare parts, with high autonomy, on the one hand, is responsible for the scope of the area the supply of spare parts within each service station, on the one hand, when the local inventory apply to headquarters central repository for delivery. This way is easy to manage, but artificially caused fragmentation, coupled with the lack of efforts to control the headquarters of the major distinction between the library, the major area in their own way to manage its own inventory, effective communication and collaboration between, resulting in the company Overall overstock and individual region inventory shortage coexist. Therefore, the need to improve the existing inventory management. On this basis, the paper, under the guidance of the multi-echelon inventory optimization and control theory, will be distributed inventory the introduction of the car manufacturer's service spare parts inventory management, centralized control strategy to build inventory model. Model in the application process, solving various inventory control parameters, the reorder point is relatively easy to solve, general analytical method can be used to find the quantities and allocate the amount of solved using the analytical method is more difficult, this paper using a genetic algorithm to solve. Based on this, the design Solving the model quantities allocate the amount of genetic algorithm, and algorithm design. Finally, in order to verify the effectiveness of this centralized control strategy, with a numerical example to test.
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