AS 61508.5-1999

1 - AS 61508.5-1999 FUNCTIONAL SAFETY OF ELECTRICAL/ELECTRONIC/PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS - EXAMPLES OF ...
4 - PREFACE
5 - CONTENTS
6 - INTRODUCTION
9 - 1 Scope
11 - 2 Normative references
11 - 3 Definitions and abbreviations
12 - Annex A - Risk and safety integrity – General concepts
12 - A.1 General
12 - A.2 Necessary risk reduction
13 - A.3 Role of E/E/PE safety-related systems
13 - A.4 Safety integrity
16 - A.5 Risk and safety integrity
16 - A.6 Safety integrity levels and software safety integrity levels
16 - A.7 Allocation of safety requirements
18 - Annex B - ALARP and tolerable risk concepts
18 - B.1 General
18 - B.2 ALARP model
21 - Annex C - Determination of safety integrity levels: a quantitative method
21 - C.1 General
21 - C.2 General method
22 - C.3 Example calculation
24 - Annex D - Determination of safety integrity levels – A qualitative method: risk graph
24 - D.1 General
24 - D.2 Risk graph synthesis
25 - D.3 Other possible risk parameters
25 - D.4 Risk graph implementation: general scheme
26 - D.5 Risk graph example
29 - Annex E - Determination of safety integrity levels – A qualitative method: hazardous event severity matrix
29 - E.1 General
29 - E.2 Hazardous event severity matrix

Provides information on the concepts and relationship of risk to safety integrity together with methods of determining safety integrity levels. The Standard is identical with and has been reproduced from IEC 61508-5:1998.

First published as AS 61508.5-1999.