Good product managers think of product specs as a way to capture and synthesize the shared strengths and expertise of their team. Their product specs are often messy works in progress full of unanswered questions that they can work through in close collaboration with their colleagues. They make sure that the people building the product are engaged and invested in how and why the product is built. If somebody questions their product spec, they see it as an opportunity to make the product better, not as a personal attack.
