Alarm Rationalisation - Alarm Rate Check
Average alarm rate per hour per IEC 62682 alarm-management standard - excessive rates indicate need for alarm rationalisation.
Rate per operator
7.5alarms/h
Status
Overloaded - rationalise
Formula, assumptions, and limits
$$r = \frac{n_{alarms}}{n_{op}}$$
IEC 62682 / EEMUA 191 benchmarks: ≤ 6 alarms/h/op = acceptable. > 300 alarms/h = flood. Rationalise by prioritising + removing duplicate / unreliable alarms. Suppression on out-of-service.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $n_{alarms}$ | Alarm count in period | alarms | HMI log |
| $n_{op}$ | Operators present | - | watch roster |
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