“It’s not iteration if you only do it once.”
I’ve already mentioned Jeff Patton’s XPDay keynote, where he talked about the importance of working in iterations (as opposed to increments). Jeff has now written a column, The Neglected Practice of Iteration, on StickyMinds, making the same point (but without the music!)
Excellent stuff, and well worth a read. I suspect most people who claim to follow an iterative development process are prone to lapsing into an incremental mentality – I know I am.