What is Alarm Management?
Alarm Management is the process of designing, managing and maintaining alarm systems within industrial installations (such as SCADA, DCS or PLC environments), with the goal of safeguarding the safety, reliability and efficiency of operations.
Alarm Management = ensuring that only the right alarms reach the right people at the right time.
Without proper management, alarms can lead to chaos, alarm fatigue or missed critical notifications.
🎯 Why is Alarm Management important?
| Problem | Consequence |
|---|---|
| Too many irrelevant alarms | Operators ignore important notifications (“alarm fatigue”) |
| Late or unclear alarms | Safety risks and production loss |
| No analysis of alarms | Repeated faults, no improvement |
| No prioritisation | Everything seems important → nothing gets real attention |
🧱 Alarm Management lifecycle (per ISA-18.2 / IEC 62682)
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Alarm philosophy Guideline covering definitions, roles, design rules and management principles
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Design / rationalisation Determining which alarms are genuinely needed, with the correct priority
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Monitoring & tuning Reviewing alarm frequency, false positives and default values
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Maintenance & improvement Performing alarm analyses, improving on the basis of incidents/logs
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Audit & training Training operators and reviewing the system periodically
🏭 Examples of alarm situations
| Alarm type | Example |
|---|---|
| Process alarm | Tank level above 90% (potential overflow) |
| Safety alarm (Interlock) | Pressure too high → pump shut down automatically |
| System alarm | Sensor failure or communication error between PLC and SCADA |
| Operational alarm | Maintenance interval exceeded or manual override active |
🔧 Alarm Management tools & metrics
| Tool / indicator | Purpose |
|---|---|
| Alarm flood report | Detecting too many simultaneous alarms |
| Alarm rate (per hour) | Max. 1–2 alarms per operator per 10 minutes (best practice) |
| Standing alarm analysis | Alarms that remain active too long → often indicates a structural issue |
| Bad actor list | Top 10 alarms with the highest recurrence → priority for improvement |
| Alarm shelving / inhibiting | Temporary suppression of irrelevant notifications |
📌 In summary
Alarm Management is essential to keep processes safe and manageable. It helps operators stay focused, mitigates risks and ensures compliance with standards such as ISA-18.2 and IEC 62682.