Module 7 - Alarm Management

Module from the Instrumentation Engineering Curriculum curriculum.

ALARM MANAGEMENT · Learning Objectives · 1. Apply ISA 18.2 alarm management lifecycle 2. Conduct alarm rationalization to reduce nuisance alarms 3. Set appropriate alarm limits based on process consequences 4. Monitor alarm system KPIs against EEMUA 191 benchmarks 5. Manage alarm floods during upsets · Alarm System KPIs — EEMUA 191 / ISA 18.2 Benchmarks

KPI	Definition	Acceptable	Manageable	Overloaded	Target	Improvement Action
Alarm Rate (avg)	Alarms per 10 minutes during normal operation	≤1	1-2	>2	<1 per 10 min	Rationalize — remove nuisance alarms, increase deadbands
Alarm Rate (peak)	Maximum alarms in any 10-minute period	≤10	10-20	>20	<10 peak	Implement state-based alarming, suppress during transitions
Standing Alarms	Alarms continuously active (stale)	<5	5-15	>15	<5 at any time	Investigate root cause, suppress with documented reason, fix
Chattering Alarms	Alarms that activate >5 times per hour	0	1-3	>3	0	Increase deadband, add time delay, check process or sensor
% Alarms with Priority	Alarms properly prioritized per rationalization	100%	90-100%	<90%	100%	Complete alarm rationalization per ISA 18.2
Priority Distribution	Low/Medium/High/Critical split	~80/15/4/1%	Reasonable distribution	Majority high/critical	80/15/4/1	Re-rationalize if distribution skewed toward high priority
Operator Response Rate	% of alarms acknowledged within 10 min	>95%	80-95%	<80%	>95%	Reduce total alarms to manageable level, improve HMI
Source: EEMUA 191 (Alarm Systems), ISA 18.2-2016, FOS Chief Files — Instrumentation Misc

Source: Instrumentation_Engineering_Curriculum_v1.xlsx · Sheet: Module 7 - Alarm Management

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