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Alarm management: fix the alarm system before adding AI

Alarm floods are solved with an alarm philosophy first, not a model. AI works better on an orderly alarm list.

September 22, 20262 minKutup · ASP Dijital
In short
  • An alarm should announce a condition that needs operator action, and an alarm that cannot be acted on or always clears itself is noise.
  • Measure alarm counts per shift and per operator, the most frequent alarms and how long each stays active before making any change.
  • For every alarm, the cause, expected operator action, response time and consequence should be written, and a model’s suggestion does not replace that accountability.

The job of an alarm

An alarm should announce a condition that needs an operator action. An alarm that cannot be acted on, has an unclear consequence or always clears itself is noise. The alarm management lifecycle typically covers philosophy, identification, rationalization, detailed design, implementation, operation, monitoring and management of change.

Measure first

Extract alarm counts per shift and per operator, the most frequent alarms and how long each stays active. If a small group of alarms makes up most of the total, inspect those first. These measurements are the baseline against which you compare any model’s improvement.

Rationalization

For every alarm, write the cause, the expected operator action, the response time and the consequence. Remove an alarm with no action or turn it into an event record. Do this with the engineer who owns the alarm system; a model’s suggestion does not replace that accountability.

Where AI fits

A model can help group alarms, show related events or suggest leading indicators. Changing priority or safety-related alarms, however, requires an authorized management-of-change process. This guide is a suggested workflow; the applicable standard and settings depend on the plant’s risk assessment.

Frequently asked

How do I reduce alarm floods before adding AI?

Measure alarm counts per shift and per operator, the most frequent alarms and how long each stays active. For every alarm, write its cause, expected operator action, response time and consequence. A model can help group alarms or show related events, but priority and safety-related changes need an authorized management-of-change process.

What does the alarm management lifecycle include?

The lifecycle typically covers philosophy, identification, rationalization, detailed design, implementation, operation, monitoring and management of change. Rationalization removes an alarm with no action or turns it into an event record. Do this with the engineer who owns the alarm system.

Sources and further reading

Pilot steps in this guide are proposed engineering workflows. Examples do not constitute measured field performance.

Questions on this topic

Why does a PID loop oscillate?What is alarm flooding, and how can it be prevented?How do I reduce false alarms in an anomaly detection model?How do precision and recall apply to alarm thresholds?How do you draw a process flowchart?

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