In this UX Mastery article, 20 UXers (including me) provide their tips for selling UX to clients.
My tip is all about the importance of having a clear project plan.
Particularly when adopting user experience design activities for the first time, it helps to have a plan which shows how the planned activities lead to an end result. This gives stakeholders a sense of control and confidence.
UX teams can often be reticent to make their plan highly visible, since plans inevitably change. The trick is to remember that your plan is a ‘living document’, and to make sure other stakeholders understand that from the outset.