Change efforts happen when a firm is out of alignment with achieving its vision. If the organization has broad buy-in on a clear vision, the need for change becomes much clearer. It also helps to over-communicate what you're doing and why you're doing it. Lastly, the leadership needs to spend as much time on "how" changes are being made and "what" changes are being made. Human beings are involved and there are winners and losers.
Robert S. Kaplan