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This picture illustrates state models of the change requests of three different types:

1. Standard Change;
2. Normal Change;
3. Emergency Change.

Also, you can find a brief description of every status under the picture.

Image Modified

Statuses Description

Registered

When the change request is newly created, it has this status. If this is a Standard change, then it transitions straight to the In Progress status, as the standard change is a pre-approved type. If this is a Normal or Emergency change request, then the request transitions to the Authorization state.

Authorization

This status is necessary to pass for Normal or Emergency Changes. In this status, the request must be reviewed and authorized by the responsible persons or groups (see more on the Change Request Authorization). After all authorization steps have been passed, the change request transitions to the Scheduled status.

Scheduled

In this status, the change request has the following prerequisites:

1. Planned start date;
2. Planned end date.

So it is preliminary known when it will be implemented.

In Progress

This status displays that the request is in progress of implementation now. When the work is over, the status has to be changed to the Completed.

Completed

Post-Implementation Review

Closed