This continues to promote the easy but false narrative that there was waterfall and then there was Agile/XP. For example, it says "Winston Royce earned fame by

This continues to promote the easy but false narrative that there was waterfall and then there was Agile/XP. For example, it says "Winston Royce earned fame by suggesting that software be developed in a linear sequence of processes". If you read the actual paper, you'll see that Royce did not suggest that. http://leadinganswers.typepad.com/leading_answers/files/original_waterfall_paper_winston_royce.pdf http://leadinganswers.typepad.com/leading_answers/files/orig... . He wrote "I believe in this concept but the implementation described above is risky and invites failure." He then goes on to say the waterfall model "has never worked on large software efforts." He explicitly proposes a two-stage delivery: deliver a prototype, get feedback, and then deliver the final product. Anyone who is interested in what state-of-the-art was before Agile/XP should read the first edition of "Rapid Development", from the mid-1990s. It comes out the Rapid Application Development methodology of the 1970s 1980s. Agile draws from RAD as one of its sources.