Which of the following is NOT a type of change request?

A modification is a type of change request that involves altering the original design, configuration, or components of a system or document. This may include updating specifications, making enhancements, or addressing deficiencies. Modifications follow established processes to ensure that changes are systematically evaluated for their impact on functionality, safety, and performance before implementation.

On the other hand, IRAC (Issue, Rule, Application, Conclusion), RAC (Request for Action), and Revision all represent various forms of change requests or processes associated with revisions and updates. An IRAC helps in clarifying issues and determining applicable laws or guidelines, while a RAC is a formal request to initiate an action. Revisions pertain to changes that are often less formalized but still involve adjustments to existing documents or procedures. Therefore, modification stands apart as a distinct type of change request, proving why it is the correct answer in this context.