This is one of the most important lessons of the scientific method: if you cannot fail, you cannot learn.
Eric RiesCustomers don't know what they want. There's plenty of good psychology research that shows that people are not able to accurately predict how they would behave in the future. So asking them, 'Would you buy my product if it had these three features?' or 'How would you react if we changed our product this way?' is a waste of time. They don't know.
Eric RiesInnovation is a bottoms-up, decentralized, and unpredictable thing, but that doesnโt mean it cannot be managed.
Eric RiesAt IMVU, the cost of customer acquisition through our five-dollar-a-day AdWords campaign was less than twenty-five cents. Our revenue from those same customers was more than a dollar.
Eric RiesNowadays people talk about PayPal's founders as prescient geniuses who would inevitably change the world. It was, however, not so obvious that PayPal would taste its first major success by helping people sell Beanie Babies on eBay. But they had a vision, a hope, and the perseverance to try multiple iterations until they got it right.
Eric Ries