In an ideal world, Waterfall will lead to a worse product than an iterative one. We don't live in the real world, and I expect these guys deal with clients who

In an ideal world, Waterfall will lead to a worse product than an iterative one. We don't live in the real world, and I expect these guys deal with clients who regularly fall into the -from-hell[1] category. I would bet that many people posting here aren't running consultancies and don't have experience with such clients (or any clients). In such a situation, it is in fact entirely rational to develop a lightweight, low cost UI that a non-technical person can commit to, i.e. sign a contract. The developer can then go off and implement it with a very clear legal case if the client then chooses not to pay because "its not what we wanted". Its not what I do, and I know that many here take a more involved approach to their clients, but its undeniable that it is a successful business model, and in some cases I believe it can produce some result where otherwise there might be none. Equally I'm sure it produces results that are ultimately not used, but where the company still gets paid. [1] http://clientsfromhell.net/ http://clientsfromhell.net/