Currently the companies are joining efforts to become more competitive in the global market. The objective of the companies is to give a better service, with lesser cost and is trying to reach this objective analyzing all the supply chain as if it was a company, so that of this form they obtain to reduce the total cost of the product instead of the specific cost of a member of the chain, therefore the times an action can reduce the cost of a member while it increases the cost of the other in a very superior value, causing an increase in the final cost of the product. The maximum of global solution is greater that the maximum of the each member solution. Through this model we will have instead of marks against marks, the competition between suppliers - mark - store against suppliers - mark - store, or better supply chains versus supply chains. For cause of this, the companies are trying to control the chain of an integrated form, using the technology of the information to increase the productivity, to diminish the costs and to increase the speed in the transference of the information between the members of the supply chain. The main objective of this work is to show the carried through efforts, between the members of the supply chain, to integrate electronically the information between the companies, analyzing the real case between the assembly plants and its dealers.