CEI EN 61508-5 : 2011

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions and abbreviations
Annex A (informative) - Risk and safety
        integrity - General concepts
Annex B (informative) - Selection of methods
        for determining safety integrity
        level requirements
Annex C (informative) - ALARP and tolerable
        risk concepts
Annex D (informative) - Determination of safety
        integrity levels - A quantitative method
Annex E (informative) - Determination of safety
        integrity levels - Risk graph methods
Annex F (informative) - Semi-quantitative method
        using layer of protection
        analysis (LOPA)
Annex G (informative) - Determination of safety
        integrity levels - A qualitative
        method - hazardous event
        severity matrix
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Specifies information on: - the underlying concepts of risk and the relationship of risk to safety integrity; - a number of methods that will enable the safety integrity levels for the E/E/PE safety-related systems to be determined.