[JakeAl]

This is how I started going about managing complex design processes, BEFORE agile and whatever buzzwords they use to describe the same problem discovery, identification, positioning ad solution proposals. You go as deep as you need to THINK through the details involving all people who know the details. When you do it right all of the correct people fully inform the process and any TDD that is derived from it, all while keeping everyone in consensus about the goal and the decisions being made to get there. But it can all be worked on paper first if you don't cut corners and have the right people involved (like GUI designers and not marketing or the client should be designing interfaces).

http://www.dubberly.com/articles/managing-complex-design-pro...