The purchasing area, recently, has passed through a great improvement in terms of research in the academic world, in which publications about this subject have increased significantly in the last years. In the business context, purchasing assumed a strategic importance, being now not just restricted to an operational motivation. As consequence, many companies have been developing their purchasing area, as has been happening also at Petrobras. The purpose of this dissertation is to analyze the current purchasing process for non-strategic materials in this company, specifically in Rlam (Landulfo Alves Refinery). In order to do this, eighteen questionnaires were applied in structured interviews with employees who are involved with Rlam purchasing process. As a result of the study, it could be concluded there is adherence between the purchasing plan and the academic literature, however the execution and operation of the plan need some improvement because they are, in some points, acting based on old paradigms. Reasoning this context, this dissertation contributes in offering improvement proposals.