The purpose of the Project Portfolio Relationships model (PV-1)is to give an organizational perspective of programmes, projects, portfolios and initiatives. It provides details on the relationships that exist between the organizations that own these programmes, projects, portfolios and initiatives. It is also used to identify the level of maturity to be achieved at each stage of a programme's life-cycle.

All this information can be found in the different chapters of the PV-1 model.