The project analizes and compares two very important and diferent business models in fast fashion industry: Zara y Benetton models. Their models are so diferent but have been a great success, due to their capacity to respond quickly to demand of the market, then due to their flexibility. In this regard, the project also demonstrates how information sharing have a big role to the success of a company. It improves the efficiency of a company and helps to achieve the customer satisfaction . To achieve a good sharing information, it' s important a good and strenght relationship between manufacturer and retailer.