A Service Configuration Management System (CMS) or Configuration Management Database (CMDB) stores detailed information about the configuration items (CIs) and their relationships. This data is crucial for diagnosing incidents by providing insight into which components may be causing or affected by an incident.

Diagnosing Incidents (Answer C - Correct): A CMS helps Incident Management by providing valuable data about the configuration items involved in an incident. By understanding the relationships between different components, the system can help identify the root cause of incidents more effectively.

Detecting Incidents (Answer A - Incorrect): Incident detection is typically handled by monitoring tools rather than the CMS. The CMS supports diagnosis but does not directly detect incidents.

Managing Incident Records (Answer B - Incorrect): Incident records are typically managed in an IT service management (ITSM) tool. While the CMS contains valuable configuration data, it is not primarily used to manage incident records.

Collecting User Feedback (Answer D - Incorrect): The CMS is not used to collect user feedback. Feedback is typically gathered through the Service Desk or other user interaction systems.

ITIL 4 Reference:

Incident Management Practice: The CMS provides essential data for diagnosing incidents by giving a clear picture of the affected configuration items and their interdependencies.