Customer development?

From Lessons Learned:

When I first got the 'listening to customers' religion, my plan was to talk to as many customer as possible, and build them as many features as they asked as possible. This is a common mistake. Our goal in product development is to find the minimum feature set required to get early customers. In order to do this, we have our customer development team work hard to find a market, any market, for the product as currently specified. We don't just abandon the vision of the company at every turn. Instead, we do everything possible to validate the founders' belief.