Waterfall leads to 90% ready 90% of the time! (the very definition of unpredictability)
One of the most common anti-patterns I’ve seen in waterfall projects is the “90% done syndrome”. It goes like this: the project will get quite quickly to 90% readiness and will look to be on time until that point. However, after the 90% readiness point is achieved we start to see more and more delays …