Playbook
Cold room alarm escalation: make sure the 2 am alarm reaches someone who acts.
Most overnight losses are not sensor failures. The alarm fired; it went to one person who was asleep.
The problem
A local buzzer nobody hears, or a single SMS to one phone. No second person, no record of who saw it, and the excursion is discovered at the morning round.
The playbook
- Warn before the alarm. Watch drift so a unit heading for its limit is flagged early.
- Use several channels. Screen and sound first, then email, SMS and push.
- Escalate in levels. If the first person does not acknowledge, the next level is told, and so on.
- Require a reason. Every acknowledgement and closure carries a comment.
- Separate fault types. A communication gap or sensor failure is its own alarm, not silence.
- Keep the roster current. Update escalation lists when shifts and people change.
- Review weekly. Look at time to acknowledge and alarms that reached the last level.
How to measure it
| Measure | Direction |
|---|---|
| Time from alarm to acknowledgement | Down |
| Alarms reaching the top escalation level | Down |
| Excursions found at a manual round | To zero |
How ColdWatch does it
ColdWatch monitors freezers from −80 °C to cold rooms at 2–8 °C, plus product probes and door contacts, on the sensors you already have, over BACnet/IP or Modbus TCP. It raises five alarm types (high, low, rate of change, comms gap and sensor failure) and escalates by screen, email, SMS and push until someone acknowledges with a mandatory comment. AI projects drift forward to say which unit is likely to breach next and roughly when. Excursions go into a register with duration, peak, shift and severity; calibration due dates are tracked with reminders at 30, 15 and 7 days; and every reading, alarm and action is kept in an append-only ALCOA+ audit trail for five years, with IQ/OQ/PQ documents delivered as part of go-live.
Questions
What is an alarm escalation matrix for cold rooms?
A list of who is told about an alarm, through which channel, and who is told next if nobody acknowledges within a set time.
Is SMS enough for freezer alarms?
A single SMS to one person is risky. Use several channels and escalate to the next level until someone acknowledges with a reason.
See it on your own data. ColdWatch — Every freezer, every minute. Book a 30-minute working session with an engineer.