How do you implement effective alarm management in a DCS?

DCS alarm management per ISA-18.2/IEC 62682: alarm philosophy (define purpose, responsibilities, and lifecycle), rationalization (review each alarm - is it actionable, unique, necessary?), documentation (alarm setpoints, priorities, response procedures), configuration (remove bad actors, configure deadbands, implement state-based alarming), monitoring (alarm rate metrics - target <150 alarms/operator/shift), and continuous improvement (alarm response analysis, modification process). Priority levels: critical (emergency action required), high (immediate action), medium (timely action), low (awareness). Features: alarm shelving (temporary suppress with timeout), flood suppression (manage during upsets), and first-out annunciation (root cause identification). Train operators on alarm response.