FOREWORD
INTRODUCTION
1 Scope
2 Terms, definitions and abbreviations
3 Risk and safety integrity - general guidance
3.1 General
3.2 Necessary risk reduction
3.3 Role of safety instrumented systems
3.4 Safety integrity
3.5 Risk and safety integrity
3.6 Allocation of safety requirements
3.7 Safety integrity levels
3.8 Selection of the method for determining the
required safety integrity level
Annex A (informative) As Low As Reasonably Practicable
(ALARP) and tolerable risk concepts
Annex B (informative) Semi-quantitative method
Annex C (informative) The safety layer matrix method
Annex D (informative) Determination of the required safety
integrity levels - a semi-qualitative method:
calibrated risk graph
Annex E (informative) Determination of the required safety
integrity levels - a qualitative method: risk graph
Annex F (informative) Layer of protection analysis (LOPA)
Figures
Tables