Would you build a house or redecorate a room without a plan? Then why on earth would you try to implement a change in your organization without a plan?
When organizations go about changing, the hardest work is almost always related to people. Getting people ready, willing and able to work differently is easier said than done. Defining a vision is important, but translating that vision into real change is an entirely different challenge that is where the rubber really meets the road.
Planning for change involves assessing the needs of individuals and the organization and then developing plans to help people change their behaviors. Good planning helps you identify poeple issues related to the proposed change before they trip you up.
Take it step-by-step. Proactively manage the change… just start with a plan.