Final answer:
Change tasks can be manually added in the Implement, Authorize, and Assess states, which are part of the change management process in project or IT service management.
Step-by-step explanation:
In the context of project management and IT service management, change tasks can manually be added in certain states of a change request or change management process. Based on the given options, the three states where change tasks can manually be added are:
These states correspond to different phases of change management procedures, where:
- Assess refers to the initial evaluation of the change.
- Authorize is the phase where changes are reviewed and approved for implementation.
- Implement is the actual process of putting the approved change into action.
States like Canceled and Closed do not typically allow for the manual addition of change tasks as they represent the termination or completion of the change process.