Abstract
Establishing the most appropriate relationship with the suppliers is a main issue for companies. We propose a methodology to evaluate suppliers in order to support these decisions. We define specific criteria of the products and those directly related with the suppliers, as well as their indicators. A criticality index and a strategic index of suppliers are been calculated by using PROMETHEE and AHP. These indexes have been implemented in a real company to classify their suppliers according to the most interesting relationship (partners, long term contracts, market policies or elimination).
