From a managerial point of view, considering budgets increasingly lean and controlled, besides a restricted schedule there is a need to find cheaper and more viable alternatives for the scenario presented with related to commercial electronics parts. On the other hand, the increasing offer of COTS (Commercial Off The Shelf) with the reached quality by manufacturers seems a good opportunity to use COTS components in electronic projects for small satellites with short and medium-term missions, through a coherent study that meets the restrictions mentioned above. For that, a method that helps in indicating the best COTS for the systems engineer and/or project engineering can be of great use.