Change Management :

This IT process logs all significant changes to the enterprise environment, coordinates change related work orders, prioritizes change requests, authorizes production changes, schedules resources, and assesses the risk and impact of all changes to the IT environment. Given the scope of this process, it is easy to see why it interacts with every other process in the ITSM Reference Model. As processes are performed they will inevitably create some kind of change in the IT environment. Change Management is the one process that regulates these changes, controls them and records them, thereby dramatically reducing infrastructure instability.