Alarm Management & ISA-18.2:
make the screaming mean something.
An alarm is a promise: 'a human must act, now, or something bad happens.' Break that promise by flooding the operator with thousands of nuisance, duplicate and standing alarms, and the whole system goes deaf at the moment it is needed most. Major industrial disasters share a chapter where the alarms were screaming and no one could tell which one counted. ISA-18.2 is the standard written to fix this. It sets out a full alarm lifecycle: rationalization, prioritization by risk, the engineering tools to suppress noise without hiding danger, and metrics to keep the system healthy. This module builds that discipline on the alarm foundations from D11. Here good HMI design becomes part of how the plant stays safe, although the alarm system never replaces the safety instrumented system.
When everything alarms, nothing does
🌊 ISA-18.2 and EEMUA 191 count more than 10 alarms in 10 minutes, per operator, as a flood, and a real flood brings hundreds. Past that threshold the alarm system stops being a tool and turns into noise, so the one alarm that counts drowns with the rest. Alarm floods have killed people.
Every alarm earns its place
✅ rationalization is the test each alarm must pass: a real cause, a real consequence, and a specific action the operator can take in the time available. If there's no action, it isn't an alarm. It's a log entry wearing a siren.