[mjnaus]

Shouldn't it be more like:

(0. Are we solving a pain / is there a market)

1 - "Will anyone pay for it?

2 - "Can we build something"

3 - "Can we turn a profit on each unit?"

4 - "Can we grow profitably and eventually cover our fixed costs?"<br>

[mathattack]

Yes - 0 through 2 can be shuffled. Sometimes you can just ask questions and get answers. Sometimes people can't visualize the need until you put something in front of them. Those first few steps are also more iterative than I showed, though 3 and 4 are more sequential.