Change Management, also known as Configuration Management, is focused on tracking changes in the software and systems over time.  Change Management techniques are used to create and store revisions of software and also can be used to reproduce a version of the software at any point in its evolution.  Many organizations has specific legislative or corporate requirements for submitting and tracking changes to systems; Change Management helps teams verify compliance.  Good change management practices allow you to control and recreate versions of both complex and simple systems.

Change Managment and ALM

In the application lifecycle, Change Management touches on the happens primarily during the definition, construction, management, release  and maintenance activities.  From a compliance perspective, Change Management can be closely related to the oversight activity.

Change Management is about making sure you are tracking and vetting changes.  Change Management also focuses on tracking versions of applications and making sure that the configurations are in compliance with the rules and standards for the team.