A Research On The Just-in-time Purchasing System Of Automotive Manufacturing Industry Based On The Supply Chain

The dissertation focused on the field of research of purchasing and supply of Chinese automotive industry. It transplanted the philosophy of just-in-time system to the operations of logistics of inter-corporations and practices just-in-time purchasing tactics in order to reduce the overall cost of supply chain run and speed up the response to the customers'needs. Firstly, the current status of the purchasing and supply of Chinese automotive industry was presented through the survey in the several giant automotive manufacturing plants of China. Based on the current practices of purchasing and supply, three kinds of tactics of purchasing and supply logistics were summarized in Chinese current automotive industry. Secondly, the character and definition of just-in-time purchasing were expatiated on through referring to the domestic and overseas documents about just-in-time purchasing system. The just-in-time purchasing tactics was compared with traditional purchasing tactics. Thirdly, the role of just-in-time purchasing system on decreasing the bull-whip effect was dissertated using the theory of bull-whip effect. Last, much attention was paid to the research on how to harmonize suppliers with automotive manufacturing plants to meet the requisition of just-in-time purchasing system. Some suggestions were given on implementation of just-in-time purchasing system in Chinese automotive industry. We can get some conclusions with the study of the dissertation: 1) In Chinese automotive manufacturing industry, there are three kinds of tactics of purchasing and supply logistics, that is, batch supply, kanban supply and synchronizing supply. Their can be used within different conditions. 2) Just-in-time purchasing system can be put into practice when all these conditions followed are satisfied: partner relationship of supply and customer plants, sharing information about demand, small lot of delivery with hi-frequency. 3) Just-in-time purchasing system can play a role on decreasing bull-whip effect. 4) In order to put just-in-time purchasing system to practice in automotive industry, we have to carry out level schedules for mixed-model assembly lines for customer plants and practice one-flow production system in the factories of suppliers.