This article provides guidance to project managers to design a management methodology to facilitate the implementation of distributed systems of 3G technology antennas in indoor spaces. The quantitative exploratory methodology allowed a concrete analysis as a basis for the design proposal. Thus, the most appropriate standard in project management for this type of solution was determined; taking as a reference the applied instrument results, a custom-made methodology was designed, and only critical areas were involved. Using this methodology reduces costs and time in all phases, provides final satisfaction to the client and allows monitoring the progress of each task throughout the implementation stage; in general, it is a useful tool that enable in-execution follow-up and project completion. It is then concluded that good practices and a management methodology application allow to a great extent the achievement of the objectives.