What does an alarm rationalisation pass actually do?

An alarm rationalisation pass takes the alarms that fire on a freshly-commissioned BMS estate and reclassifies them by operator action. The output is a smaller, prioritised alarm queue that an operator can actually action — and a documented basis for why every alarm survives.

The classification

• Priority 1 — requires immediate operator action; failure to act has consequence within minutes.
• Priority 2 — requires action this shift; degradation if ignored.
• Priority 3 — informational; logged, not actively presented.
• Suppressed — symptomatic of another active higher-priority alarm; auto-grouped under the parent.

On a typical handover, rationalisation removes 60-80% of the active-presentation load. The estates team gets an alarm queue they trust; the BMS contractor gets a documented basis the operator agreed to.