The life cycle of a space mission can be divided into different phases, each related to different aspects of the mission project. The first phases, following the model of the European Space Agency, are focused on the development of functional systems and technical requirements, as well as the identification of the activities and the necessary resources. The intermediate phases focus on project development activities and the qualification of the product and services. The last phases cover the activities carried out during the period of activity of the mission, and its disposal. Phase D is focused on the qualification and validation of the product.