By the time that product is ready to be distributed widely, it will already have established customers.
Eric RiesScience and vision are not opposites or even at odds. They need each other. I sometimes hear other startup folks say something along the lines of: 'If entrepreneurship was a science, then anyone could do it.' I'd like to point out that even science is a science, and still very few people can do it, let alone do it well.
Eric RiesWhat if we found ourselves building something that nobody wanted? In that case what did it matter if we did it on time and on budget?
Eric Ries