Design of supply system is considered as one of the most important strategic decisions and a key factor to ensure operational and financial efficiency. This work presents the methodological issues, the inventory management scheme, the mathematical models proposed and the findings and results to improve the supply system a marketer of lubricants in Colombia, in order to determine tactical and operational strategies. Likewise, procedures for inventory management were developed; and the amount of product to be stored, and quantity and purchase frequency were determined. These decisions contributed to reduce logistics operation cost, optimize inventory investment level and improve customer service level and reduce overall costs associated with inventory of products.

Methodology for work focused on three phases: Characterization of the supply system through SCOR model for understanding the procurement process dynamics and its implications for the overall operation of the company, which allowed us to propose procedures for supply management; Implementation of mathematical models to calculate the amounts and frequency of purchase by product category that would allow reduce inventory costs and increase customer service level and; Design of simulated scenarios to analyze decision variables and their impact on key performance indicators.