In this paper, we propose to conceptualize projects as an integration of three views: the planning, the system anatomy, and the architectural ones. The system anatomy is the core in the Integration Driven Development approach, which has been successfully employed in a number of complex projects in the telecom industry. An illustration showing the integrated view is proposed as an instrument for managing the project. We discuss what effects on planning and risk management can be expected from applying this method, and analyze our results from a theoretical perspective called the Activity Domain Theory. Our findings are two: an amelioration of the Integration Driven Development approach with architectural aspects, and a positioning of the Activity Domain Theory with respect to the relevance versus rigor discourse in the project management discipline