Estimates become deadlines because most managers don't understand the terms 'statistical variance' and 'sample size', not because the estimates are made. ;) En

Estimates become deadlines because most managers don't understand the terms 'statistical variance' and 'sample size', not because the estimates are made. ;) Entering a contract with a client based on an estimate without a large margin for error is a statistical failing, not a strategy one. That said, I still think waterfall and other related variants are overwhelmingly the way to go. I've done both styles and the difference is night and day.