@ryanerickson The article says "For example, a large project with clearly defined requirements may benefit from the structured, sequential approach offered via a waterfall model."

It is extremely rare that I see a "large project" with "clearly defined requirements" where the requirements don't change over time or further discovery shows the initial requirements are wrong.

In other words, on the vast majority of projects I see, things change. Waterfall does NOT adapt well to change. #agile does