Your new product development should start where it ends: with the customer. When you take your “pride and joy” hypothesis to customers and ask their opinion, two bad things can happen: 1) They tell you what they think you want to hear. 2) You hear what you want to hear. Start by uncovering their needs, not testing your pre-conceived notions. And be sure to use quantitative interviews to eliminate confirmation bias.
More in 2-minute video at 35. Insist on data-driven innovation