> Waterfall development does not work. < All evidence that I've seen confirms this. Yet, in companies where they practice waterfall, all the evidence in the world can't seem to convince them of this fundamental problem. The solution is try "more" waterfall, or to alter the process of waterfall. The cognition that it isn't working, despite mountains of evidence just doesn't seem to register. I suppose this is due to an already dysfunctional company culture.