Correct me if I'm wrong but for a startup, you only have one chance. So you have to pick the right idea then the idea is all for a startup => For me, the right

Correct me if I'm wrong but for a startup, you only have one chance. So you have to pick the right idea then the idea is all for a startup => For me, the right thing for a startup founder is to transform himself to a typical custommer to find the right idea. Concerning the iteration process, that's a question of beta testing. So you have the right idea, now you have to make a good application with it which is something different. In conclusion, I would say that the good equation is: Idea+Ship=Startup. (I assume the beta testing phase is as easy as programming or whatever)