Final answer:
The valid states for Emergency Change requests are Assess, Authorize, Implement, Review, and PIR, all of which are stages of the emergency change management process.
Step-by-step explanation:
The valid states for Emergency Change requests often follow a lifecycle similar to a standard change process but are expedited due to the urgency of the situation. The states include:
Assess: Determining the impact and urgency of the change.
Authorize: Getting approval from the appropriate authority to proceed.
Implement: Carrying out the change.
Review: Evaluating the change after its implementation to ensure it was successful and identifying any lessons learned.
PIR (Post Implementation Review): A more formal review that typically occurs after the change has been in place for some time, to ensure it continues to meet its objectives and hasn't introduced any new issues.
Based on the given options and understanding of change management process, the valid states for Emergency Change requests are Assess, Authorize, Implement, Review, and PIR.