CEI EN 61511-3 : 2009

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, and abbreviations
Annex A (informative) - Risk and safety integrity - general
        guidance
Annex B (informative) - Semi-quantitative method - event
        tree analysis
Annex C (informative) - The safety layer matrix method
Annex D (informative) - A semi-qualitative method: calibrated
        risk graph
Annex E (informative) - A qualitative method: risk graph
Annex F (informative) - Layer of protection analysis (LOPA)
Annex G (informative) - Layer of protection analysis using
        a risk matrix
Annex H (informative) - A qualitative approach for risk
        estimation & safety integrity level (SIL) assignment
Annex I (informative) -Designing & calibrating a risk graph
Annex J (informative) - Multiple safety systems
Annex K (informative) - As low as reasonably practicable
         (ALARP) and tolerable risk concepts
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Gives the information on the underlying concepts of risk and the relationship of risk to safety integrity the determination of tolerable risk, a number of different methods that enable the safety integrity level (SIL) for the safety instrumented functions (SIF) to be determined the impact of multiple safety systems on calculations determining the ability to achieve the desired risk reduction.