The current complexity of the global and competitive market is forcing companies to optimize their processes, reduce costs and increase the benefits of economies of scale not only in production but also in areas such as Purchasing and Logistics. Spekman et al (1999) reveal that the purchasing value of goods and services range from 50% to 70% of the whole financial volume managed by a corporation. Due to this increasing strategic position of Purchasing, some business management models have been developed to support the area as the Kraljic´s analysis. This model establish purchasing strategies according to the financial expenses, supplier market complexity and the importance of the goods for the production. This research presents a case study on a cosmetic global company settled in Brazil that has applied these models to rebuild its purchasing process of a critical input: the alcohol cetostearylic. It reveals that this company not only saved costs but also reduced the risk of being out of stock, without incurring in an increase of inventory level.