Definition:
Confidence Level represents the assurance that risk assessment results and SIL calculations are accurate, considering uncertainties in data and modeling.
Key Points:
- Higher confidence levels support stronger risk-based decisions.
- Tied to data quality, modeling assumptions, and scope of analysis.
Example:
A SIL verification study may be assigned a “Moderate Confidence Level” if field failure data is limited.
Cited Source:
- IEC 61508-6:2010, Annex B.