Management of procurement process is now seen as an essential element to enterprise organizations. This management is a complex process, and customized due to the huge diversity of products and services that must be bought by any company. Therefore, each and every company needs some kind of tool to group its assets, in order to use the same procurement strategy for all groups of items sharing similar characteristics. Many companies have started to use portfolio matrix to help identifying not only the right procedure to purchase items, but also the right depth of the relationship with the people who are going to supply these items – e.g., developing the right strategy to supply or not these items through a strategic alliance. Despite the growing use of this matrix, literature still lacks tools to help organizations to insert their products and procurement services in their specific matrix. The present dissertation aims to offer a way of building a methodology able to elaborate a portfolio matrix that will disclose what profit impact and supply risk (matrix axes) really mean, and in which way any organization can evaluate these dimensions. In order to verify its practical viability, this methodology relies upon the Analytic Hierarchy Process - AHP and Total Cost of Ownership - TCO. This methodology was successfully applied on a media company along the second semester of 2008.