If you casually ask people what a project manager’s most important task is, you will get many different answers. “Deliver on time, scope and budget” is a common suggestion. Other popular views are “understand critical path”, “prioritize”, “make things happen” and “plan the project”.
The tasks mentioned above are certainly important. Plans need to be realistic, understanding of critical path is essential and making things happen in prioritized order is a key to success. These things combined will absolutely help the project manager “deliver on time, scope and budget”. However, sometimes the “delivering-on-time”-obsession can cause sub-optimal return of investment. Maybe scope should have been changed, time added or more money spent to maximize an opportunity. If so, it is not the project manager’s decision to make. So what does that tell us about the project manager’s most important task?