The variable part of a control or control enhancement that is instantiated by an organization during the tailoring process by either assigning an organization-defined value or selecting a value from a predefined list provided as part of the control or control enhancement.
Source(s):
NIST SP 800-53A Rev. 5
under organization-defined parameter
See assignment operation and selection operation.
Source(s):
NIST SP 800-53A Rev. 5
under organization-defined parameter