SIL is used in my industry (Industrial manufacturing and Refining). It covers more than software though. Mostly system integration - for example things like int

SIL is used in my industry (Industrial manufacturing and Refining). It covers more than software though. Mostly system integration - for example things like interlocks and whether a valve will fail open/closed etc. In one instance we wanted to use a FLIR camera to measure temperature as part of a control loop - had to provide guarantees about the cameras reliability (i.e. mean time between failure), have redundancy and fallbacks in place etc. In order to satisfy the SIL process.