Ben McMann from Tribridge talks in this presentation about the SharePoint Business Model. In my view, any project ( not just SharePoint) should start with making up such a thing. This should be the basis of your governance, the start on why and how you are going to manage things.
Every Manager needs a dashboard, and every Program Manager needs a project dashboard, so he can view in an instance what projects are running good, and what projects need corrections. Ofcourse you can build something like that in SharePoint, with nice KPI’s, but that is quite easy, so you dont need me to tell you …