This study consists in operational risk valuation of oil derivatives and ethanol´s scheduling of Petrobras logistics area in São Paulo State and brazilian Center-West region. The raw material of Logistics is information, primary factor for decision. The correct identification and risk measuring provide subsidies for the system to take care against threats that can hit product distribution. Thus, it helps to focus continuous improvement. Starting with the supply chain description it is possible to check which steps or processes are more susceptible to events that can result in impacts on delivery products. The applied metodology is based in PMBOK (Project Management Body of Knowledge) risk analysis module, a guide of good practice in project management developed by PMI (Project Management Institute). It was proposed as a model application a case study to measure the risks of a determined product supply in a specific area. A correct risk approach can enhance opportunities and reduce threats to supply chain management. It allows a better planning process and gives support to decision making for upgrades in the system.