Which Change request fields are used in conflict detection? (Choose three.)
Conflict detection identifies potential scheduling conflicts for a change request based on the configuration items (CIs), planned start date, and the planned end date in scope for the change. If a scheduling conflict exists, conflict detection also checks any related blackout or maintenance schedules and other active change requests to determine the scheduling conflict.
https://www.servicenow.com/docs/bundle/vancouver-it-service-management/page/product/change-management/concept/c_ConflictDetection.html