For those who believe that user experience can be handed off as a deliverable—likewireframes—this process might make a little sense. For UX practitioners, however, the end product is the user experience, so the UX team needs to be involved all along the way, up until the very end, ensuring the final product is the best experience it can be. The UX team can’t just pass off a concept and turn it loose. They have to stay involved. They have to lead, and not in the traditional authoritarian sense, but with humility and bycommunicating the importance of user-focused design to the entire project team.
Via Mario K. Sakata