The number of companies in Brazil and in the world is growing made up of networks or, in another word, structuring themselves through multiple alliances and different company structures. With this in mind, two large Brazilian companies SC and Ambev, leaders in their fields established an alliance creating a new company, Agrega Inteligência em Compras, whose primary aim is the management of indirect purchases of materials and services for both, as well as for the client companies. The present research is how to analyse the working of Agrega, its contribution and strategic implications on the performance and the impact in competitor terms to help contribute to other studies about the administration of companies aligned with this type of alliance. The methodology used is the case study methods using triangulation; the data is collected by means of documetal investigation considering the outcome with the help of a predominantly structured questionnaire and follow up interviews. The material is used to associate quantitative and qualitative methods. The interpretation and data analyses are based on theoretical methods using Macedo Soares integrative models in its traditional and relational versions. The results show that the analysis of the relational model take into consideration the strategic implications of the alliances evaluating the traditional analyses contributing with new insights in the decision making strategy of companies. The study further proposes a fluxogram evaluation for companies looking to increase their gains through alliances of this joint venture type.