What is the alarm rationalization process and why is it important?

Alarm rationalization is systematic review of each alarm to ensure it meets requirements: clear cause, defined consequence, operator action, and appropriate priority. Process: document all alarms in master alarm database, review each against criteria (ISA-18.2), eliminate nuisance alarms, consolidate duplicate alarms, correct priorities, define response procedures. Categories: safety, environmental, equipment protection, quality, efficiency. Benefits: reduced alarm flooding, improved operator response, regulatory compliance. Perform initial rationalization during design, then periodic review (MOC for changes). Target: 95% of alarms acknowledged within 10 minutes, average alarm rate <10/hour.