olemus
ISO/IEC TR 27019:
süsteem ja komponent, mis on vajalikud ohutuse tagamiseks
= system and component that are required to ensure safety

ülevaateid
https://en.wikipedia.org/wiki/Industrial_safety_system

https://www.sovereignfireandsecurity.co.uk/a-beginners-guide-to-life-safety-systems/

https://www.tuvsud.com/en-us/services/functional-safety/about

https://control.com/textbook/process-safety-and-instrumentation/safety-instrumented-functions-and-systems/