MS Project, Early and Often
99.9% of the project managers I know have at least heard of Microsoft Project (MSP), and all understand it to be a very capable, yet very complex environment for estimating and managing projects. But it's Saturday evening and I'm a bit cynical tonight, so I'll say that 50% of those people don't really understand how it works - and have many reasons why they should not use MSP for this project or that ... ... this is an iterative development…