In this work we designed and applied a decision analysis methodology for the analysis and evaluation of a Business Opportunity (BO) in oil industry, oriented to recommend the best alternative for electricity supply and distribution for a specific area of oil exploitation.An economic model, a probabilistic model and an Analytic Hierarchy Process model interact to achieve the objective.For this specific high investment (around USM$ 600) BO, the work produced a recommendation on whether to carry the BO or not, and suggested an alternative to implement.