Planning And Simulation Of Auto Sales Logistics Distribution Center Based On Witness

After the rapid growth of Chinese domestic automobile industry in the early 21 st century, many automobile companies have expanded their manufacturing capacity. Today the automobile industry is facing the emerging fact of productivity surplus, and the market competition is becoming more furious. The market competition has surpassed the period that product is the only focus. Service is playing an unprecedented important role. How to response faster to customer's demand, reduce the risk and pressure of the sales terminal, cut off the whole cost of system, thus enhance systematic competitive ability is getting more and more concern. The establishment of distribution center is a main approach of the industry.First the thesis introduces the method of distribution center location of domestic and overseas and the application of simulation in distribution center.Secondly, the main algorithm used in distribution center location is discussed and the characteristic of each algorithm is analyzed. Then the thesis chooses one of the algorithm in consideration of the features of auto logistics distribution center and completes the calculation of location. After this, a further qualitative analysis is made concerning the location and the final result of distribution center location is achieved. Inventory planning is an important content of distribution center planning. In consideration of the fact, a proper algorithm of inventory planning is chose and the order level at different shortage rate is figured out. Based on comparison, the proper order point is determined.Thirdly, in order to analyze the reaction time when the distribution center goes into operation, the method of simulation of discrete event system is adopted. Necessary hypothesis and simplification is made in order to build the model after the characteristic of discrete event system is analyzed.At last, poisson distribution is adopted to describe the stochastic arrival of customer's demand. The parameters of poisson distribution at different sales volume are calculated. Then the model of sale logistics distribution center is build using Witness, a systematic simulation software. By this method, the average customer's waiting time of different city sale terminal is obtained, which provides objective reference data for similar distribution center planning.