BS IEC 61508-1 : 1998 AMD 13779

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
4 Conformance to this standard
5 Documentation
    5.1 Objectives
    5.2 Requirements
6 Management of functional safety
    6.1 Objectives
    6.2 Requirements
7 Overall lifecycle requirements
    7.1 General
    7.2 Concept
    7.3 Overall scope definition
    7.4 Hazard and risk analysis
    7.5 Overall safety requirements
    7.6 Safety requirements allocation
    7.7 Overall operation and maintenance planning
    7.8 Overall safety validation planning
    7.9 Overall installation and commissioning planning
    7.10 Realisation: E/E/PES
    7.11 Realisation: other technology
    7.12 Realisation: external risk reduction facilities
    7.13 Overall installation and commissioning
    7.14 Overall safety validation
    7.15 Overall operation, maintenance and repair
    7.16 Overall modification and retrofit
    7.17 Decommissioning or disposal
    7.18 Verification
8 Functional safety assessment
    8.1 Objective
    8.2 Requirements
Annexes
Annex A (informative) Example of documentation structure
      A.1 General
      A.2 Safety lifecycle document structure
      A.3 Physical document structure
      A.4 List of documents
Annex B (informative) Competence of persons
      B.1 Objective
      B.2 General considerations
Annex C (informative) Bibliography
Tables
1 Overall safety lifecycle: overview
2 Safety integrity levels: target failure measures for a
     safety function, allocated to an E/E/PE safety-related
     system operating in low demand mode of operation
3 Safety integrity levels: target failure measures for a
     safety function, allocated to an E/E/PE safety-related
     system operating in high demand or continuous mode of
     operation
4 Minimum levels of independence of those carrying out
     functional safety assessment (overall safety lifecycle
     phases 1 to 8 and 12 to 16 inclusive (see figure 2))
5 Minimum levels of independence of those carrying out
     functional safety assessment (overall safety lifecycle
     phase 9 - includes all phases of E/E/PES and software
     safety lifecycles (see figures 2, 3 and 4))
A.1 Example documentation structure for information related
     to the overall safety lifecycle
A.2 Example documentation structure for information related
     to the E/E/PES safety lifecycle
A.3 Example documentation structure for information related
     to the software safety lifecycle
Figures
1 Overall framework of this standard
2 Overall safety lifecycle
3 E/E/PES safety lifecycle (in realisation phase)
4 Software safety lifecycle (in realisation phase)
5 Relationship of overall safety lifecycle to E/E/PES and
     software safety lifecycles
6 Allocation of safety requirements to the E/E/PE safety-
     related systems, other technology safety-related systems
     and external risk reduction facilities
7 Example operations and maintenance activities model
8 Example operation and maintenance management model
9 Example modification procedure model
A.1 Structuring information into document sets for user
     groups
A.2 Structuring information for large complex systems and
     small low complexity systems

Gives the aspects to be considered when electrical/electronic/ programmable electronic systems (E/E/PESs) are used to carry out safety functions. A major objective is to facilitate the development of application sector international standards by the technical committees responsible for the application sector. This allows the relevant factors associated with the application, to be fully taken into account and thus meet the need of the application sector. Applicable to safety-related systems when one or more of such systems incorporates electrical/electronic/ programmable electronic devices.