Frequently the role of Marketing or Management, and occurring at a generally inconvenient or damaging time in project development. It goes something like this

development: Well, this product adheres to the guidelines we set out in the requirements document, and we changed the color of the little clicky bar for you, we just have a few documentation issues to iron out and then we can ship.

marketing: Hey that's great! but we were thinking, wouldn't be cool if we could do this... It's a strategic decision you understand...