In addition to priority grouping, users should have the capability to group alarm messages according to operationally relevant categories, such as function, chronological order, and status (unacknowledged, acknowledged/active, cleared).
Additional Information:
For example, it should be possible to list alarm messages in chronological order with the most recent messages placed at the top of the stack (i.e., alarm messages entered in a pushdown stack mode). Grouping alternatives should not interfere with the detection of high-priority alarms. The grouping should be easy to implement.