CEI EN 61508-6 : 2011

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions and abbreviations
Annex A (informative) - Application of IEC 61508-2
        and of IEC 61508-3
Annex B (informative) - Example of technique for
        evaluating probabilities of
        hardware failure
Annex C (informative) - Calculation of diagnostic
        coverage and safe failure
        fraction - worked example
Annex D (informative) - A methodology for
        quantifying the effect of
        hardware-related common
        cause failures in E/E/PE systems
Annex E (informative) - Example applications of
        software safety integrity
        tables of IEC 61508-3
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Provides a brief overview of the requirements of IEC 61508-2 and IEC 61508-3 and sets out the functional steps in their application. Also provides an example technique for calculating the probabilities of hardware failure and should be read in conjunction with 7.4.3 and Annex C of IEC 61508-2 and Annex D.