Scott Sehlhorst at Tyner Blain writes:
We talk about designing products for customers, getting feedback from customers, focusing on problems, and the differences between requirements and design. I'll wager that every product manager has thought about these things.
Understanding these requirements is a necessary (but not sufficient) component of developing products inspired by your customers.
Are your customers designing your products? Or are they inspiring your designs? Read more in Inspired By Your Customers.