This activity contains the tasks involved in reviewing all implemented changes, after a predefined period has elapsed or another review trigger has been activated. It ensures that the change has had the desired effect and met its objectives, and that users and customers are content with the results, or to identify any shortcomings. The review activity determines whether the implementation plan and the back-out plan worked correctly, and whether the change was implemented on time and to cost. It determines whether any follow up action (such as the creation of a new change request) is required.

A formal close of the change is performed. The closure of a change includes updating other process areas of the status of the change.