| Along with increasingly flinty competition in automobile market, FAW-VW, which is an automobile manufactory, is regarding reducing costs as an important means which can advance competition ability of trade. An important object of JIT is reducing costs, so we had considered that we should introduce JIT theory into production process of auto. According to practical status of production and storage, we had designed JIT supply system which would aim at reducing storage costs. We would try hard to reach the purpose of reducing single car's costs by less engrossing storeroom and straight deliver goods to assembly line.This article first expounded basal idea and goal of JIT theory as well as basal means which would achieve JIT. Then the exercise of JIT in the large-size manufactory had been referred, especially in the side of materiel, supply and storage. Subsequently the study's status and development's trend of JIT had been discussed as well the extension and shortcoming of JIT idea. We had made out exhaustive analysis for requirement and feasibility about which how to bring JIT theory into practical environment of our company and achieve goal of reducing costs. When we had have a clear understand for actuality and existent question and have a specific direction for wishful goal, we constituted project solution to carry JIT into execution.The core of JIT theory is "needed production are sent to needed place at needed time". The pivotal question which this system will solve is that supplier can work out this time according to received info. Surrounding this pivotal question, we had partitioned the system design into three portions: sending data, transmitting data and incepting data. After our company constitutes production plan and collects assemblage info of locale, these info will be sent to the system of supplier through special network between them by data-transfers system. After the supplier receives these info, model of parts and number of parts will be counted as well as needed time. Then the supplier will organize to produce and transport, thereby ensure to supply FAW-VW on time. Data sendingPlan section of FAW-VW takes charge to institute production plan, including annual plan, mensal plan and every week's plan. These plans will be transported to FIS production system through KVS, then LAFES, as a model of FIS, will transported this production plan into system of supplier.In addition, there are some industry computers which are distributed in flow line of production locale and takes charge collecting data. The collected info, for example car mark and time, will be sent to FIS system. In entrance of weld, CP5A and CP6 FIS-JIT model will send collected info into system of the supplier at the same time.Data transportingStandard system RVS of VW group is adopted for file transfer and RVS is a special file transfer system with encrypt arithmetic. FIS system contains RVS model. RVS program is also installed on computer of supplier and is utilized to receive files from FAW-VW.Special VPN network has been set up between FAW-VW and suppliers in order that data can be transported reliably. In this network ISDN is adopted as special telephone line and DDN is regarded as backup link. Other devices, for example switch, router and server, have also redundancy. So data can be transferred quickly and safely in reliable link.Data receivingThe server of supplier will put files which come from FAW-VW to specified directory real time. Our program which has been designed to receive data will incessantly scan this directory and pick-up data into database. The received production plan will be regard as the most important gist of which supplier makes production plan for matched parts. The received constructional info in locale will be regard as gist of which delivers goods on time. Another query program will take charge to refresh constructional status of FAW-VW locale real time and has be provided with query function. According to the time when the semi-manufactured car pass through some spots, the tim...
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