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Plug the Holes in the Swiss Cheese Model

Stop using operator error as an excuse. Apply human factors considerations to improve your alarm system and help operators respond to alarms effectively.

Alarms play a significant role in maintaining plant safety by notifying operators of an equipment malfunction, process deviation, or abnormal conditions that requires a timely response . Alarms are one of the first layers of protection for preventing a hazard from escalating to an incident or accident. They work in conjunction with other independent protection layers (IPLs) such as relief valves, dikes, and safety instrumented systems (SIS). 

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