I'm really a scientist. I follow recipes exactly - until I decide not to. And then I'll follow something else exactly. I may decide I could turn this peach tart into a plum tart, but if I'm following a recipe, I follow it exactly.
I've always held the view that great states need strategic space. I mean, George Washington took his space from George III. Britain took it from just about everybody. Russia took all of Eastern Europe. Germany's taken it from everywhere they can, and China will want its space too.
User-centered design means understanding what your users need, how they think, and how they behave - and incorporating that understanding into every aspect of your process.