If we want successful projects we should not measure activity! Projects have by definition an outcome, a definitive result. That is the entire reason for the project's existence. This is a perfect and ideal situation - projects are designed to eliminate useless activity. So why do so many projects still have useless activity going on? Because project managers manage tasks. Tasks mean nothing unless they achieve something and the something in a project context is the result. So why not measure the results rather than the tasks!