The use of an efficient model for inventory replenishment by the supplier, VMI (Vendor Management Inventory) is one of the most important factors for companies to promote a balanced trade-off between the service level offered to the customer and the logistics costs inherent in the operation of inventory management. Due to the importance of this subject, and the opportunity of the author to take part in the implementation of the VMI program in a company of the fuel distribution sector for inventory management of gas stations, the objective of this master’s thesis is to evaluate how effective the VMI methodology is to improve performance indicators. To this end, the six indicators for five customers involved in this operation were analyzed and a comparison made among the VMI programs between two different companies, to evaluate the critical success factors, best practices and competitive advantages. The methodology used to prepare this dissertation includes bibliographic research, extracted data from primary sources of information system of the company, interviews with employees involved in this process, as well as in situ visits for direct observation. The results of this thesis were to analysis the effectiveness of the VMI program for the improvement of the performance indicators, the reasons that contributed to these results and the proposal of improvement actions for the VMI program based on the comparison of the program in two different companies of the same segment.