Whether you are leading a change initiative for your department or for your whole organization, here are the "four key functions that collectively define a successful role for the leader in a transformation" in a McKinsey classic:

"Everyone has a role to play in a performance transformation. The role of CEOs is unique in that they stand at the top of the pyramid and all the other members of the organization take cues from them. CEOs who give only lip service to a transformation will find everyone else doing the same. Those who fail to model the desired mind-sets and behavior or who opt out of vital initiatives risk seeing the transformation lose focus. Only the boss of all bosses can ensure that the right people spend the right amount of time driving the necessary changes."