BTW, the original Royce' waterfall paper didn't promoted it, but instead presented it as an anti-pattern. But even it shown feedback loops (i.e. going backward

BTW, the original Royce' waterfall paper didn't promoted it, but instead presented it as an anti-pattern. But even it shown feedback loops (i.e. going backward to the previous phases), which are kind of iterations. -- original paper by Winston Royce http://www-scf.usc.edu/~csci201/lectures/Lecture11/royce1970.pdf http://www-scf.usc.edu/~csci201/lectures/Lecture11/royce1970... A Summary of the Waterfall Paper https://medium.com/@milo.todorovich/a-summary-of-the-waterfall-paper-ae9153788d1 https://medium.com/@milo.todorovich/a-summary-of-the-waterfa... WaterfallProcess - Martin Fowler https://martinfowler.com/bliki/WaterfallProcess.html https://martinfowler.com/bliki/WaterfallProcess.html