The Companies integrating supply chain industry are to the permanent search of tools and combinations of tools ensuring a better industrial performance, logistics and trade: the fusion of the EDI with the JIT is a determining factor which is at the origin of the improvement of the performance in production because they have common objectives to eliminate the stocks and reduce waste. This paper tends to put the light on the interest of combine EDI technology with the JIT system to ensure a better performance in logistics and operational integrating firms of the supply chain. Our objective is to demonstrate the impact of EDI on the implementation of a system JIT succeeded in enterprises in order to ensure a cost optimization of production, logistics and storage.