Preparing the published article.
Safety and Compliance Terms
The words auditors use.
Terms
| Term | Meaning |
|---|---|
| Safety function | A machine function that reduces a specific risk |
| Performance level (PL) | Reliability class of a control system, a to e |
| SIL | Safety integrity level under IEC 62061 / 61508 |
| Residual risk | Risk remaining after all measures |
| Validation | Evidence that safety functions work as intended |
Usage note
The required level follows from the risk assessment. Copying a level from another project or from a component catalogue inverts the logic and leads to either over-engineering or under-protection.