There are different methodologies and models for project management; however, the inadequate use of traditional methodologies admits the probability of presenting problems in the life cycle of the same, due to changes related to the cost, time or scope of the project.The objective of the study is to take advantage of the planning advantages of traditional methodologies, such as the PMI and to potentiate the execution and control phase, through the agile scrum methodology.To do so, the proposal and theoretical description of the model was made and validated, through the "Vulcano" software development project of the Colombian National Army.The verification made it possible to identify, that taking advantage of good planning and executing these projects with an agile methodology, generates satisfactory results for a software project.In this paper the results are presented based on the case study that provides this synergy of methodologies, where considerable advantages were found in a flexible execution, but involving daily task control.