One way, managers and others use a baseline plan, is for defining a project to get top brass to sign off on it. The approval process depends on just the same aspects that a baseline plan covers such as:
- projected cost
- projected time line
- features to be included
Handing supervisors or board members a baseline plan quickly fills them in on what is expected to be done, and when, how, and for how much. That's not to say it's written in stone. A baseline plan (if put into ink at all) should be written with an "imaginary eraser" - that is, everyone involved should know that the baseline plan is subject to changes. In the project management world, change is the only constant, and the inevitable changes will be compared to the baseline plan to track progress.