GJ: First, let me start with this vibe that exists in Silicon Valley.... and some guys that talk about The Lean Startup. Eric Ries came up with it.
I think The Lean Startup misses what I think is the right approach, which is that it's more The Scientific Startup - or a series of experiments and you'd have to have some idea of decision analysis around those. Like which experiments do you want to do versus which bets are you comfortable making? There's really no way to test it besides building it, and that's not a lean operation.