The system should notify the user when 'unexpected' alarms occur, if the alarm processing logic can support such an analysis.
Additional Information:
A related feature that may also be considered is to annunciate the absence of expected alarm patterns; i.e., the system can notify the operator when 'expected' alarms do not occur, if the alarm processing logic can support such an analysis. Such analyses may apply, for example, during certain transients (e.g., reactor scram) where the expected alarm pattern is well known.