Is your "big idea" worth pursuing? What if you could test your business model earlier in the process--before you've expended valuable time and resources?
You've talked to customers. You've identified problems that need solving, and maybe even built a minimum viable product. But now there's a second bridge to cross. How do you tell whether your idea represents a viable business? Do you really have to go through the whole cycle of development, failure, iteration, tweak, repeat?