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eLibrary > 25/30507626 DC BS EN IEC 61508-3 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 3: Software requirements >

25/30507626 DC BS EN IEC 61508-3 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 3: Software requirements, 2025

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25/30507626 DC BS EN IEC 61508-3 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 3: Software requirements, 2025

30507626-NC.pdf
65A_1169e_CDV.pdf [Go to Page]
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Conformance to this document
5 Documentation
6 Requirements for management of safety-related software [Go to Page]
6.1 Objectives
6.2 Requirements
7 Software safety lifecycle requirements [Go to Page]
7.1 General [Go to Page]
7.1.1 Objective
7.1.2 Requirements
7.2 Software safety requirements specification [Go to Page]
7.2.1 Objectives
7.2.2 Requirements
7.3 Validation plan for software aspects of system safety [Go to Page]
7.3.1 Objective
7.3.2 Requirements
7.4 Software design and development [Go to Page]
7.4.1 Objectives
7.4.2 General requirements
7.4.3 Requirements for software architecture design
7.4.4 Requirements for support tools, including programming languages
7.4.5 Requirements for detailed design and development – software system design
7.4.6 Requirements for code implementation
7.4.7 Requirements for software module testing
7.4.8 Requirements for software integration testing
7.5 Programmable electronics integration (hardware and software) [Go to Page]
7.5.1 Objectives
7.5.2 Requirements
7.6 Software operation and modification procedures [Go to Page]
7.6.1 Objective
7.6.2 Requirements
7.7 Software aspects of system safety validation [Go to Page]
7.7.1 Objective
7.7.2 Requirements
7.8 Software modification [Go to Page]
7.8.1 Objective
7.8.2 Requirements
7.9 Software verification [Go to Page]
7.9.1 Objective
7.9.2 Requirements
8 Functional safety assessment
9 Bibliography
Annex A (normative) Guide to the selection of techniques and measures
Annex B (informative) Detailed tables
Annex C (informative) Properties for systematic capability of software elements [Go to Page]
C.1 Introduction [Go to Page]
C.1.1 Structure of Annex C, relating to Annexes A and B
C.1.2 Method of use – 1
C.1.3 Method of use – 2
C.2 Properties for systematic capability
C.3 Properties for systematic capability – Detailed tables
Annex D (normative) Safety manual for compliant items – additional requirements for software elements [Go to Page]
D.1 Purpose of the safety manual
D.2 Contents of the safety manual for a software element
D.3 Justification of claims in the safety manual for compliant items
Annex E (informative) Relationships between IEC 61508-2 and this document
Annex F (informative) Techniques for achieving non-interference between software elements on a single computer [Go to Page]
F.1 Introduction
F.2 Domains of behaviour
F.3 Causal factor analysis
F.4 Achieving spatial independence
F.5 Achieving temporal independence
F.6 Requirements for supporting software
F.7 Independence of software modules – programming language aspects
Annex G (informative) Guidance for systems configured by application data [Go to Page]
G.1 Introduction
G.2 Aspects influencing lifecycle requirements [Go to Page]
G.2.1 Complexity of E/E/PE systems
G.2.2 Rationale for the lifecycle requirements
G.2.3 Complexity in software [Go to Page]
G.2.3.1 Introduction
G.2.3.2 Constituents of the complexity
G.2.4 Programming language characteristics and safety [Go to Page]
G.2.4.1 Programming language intrinsic characteristics
G.2.4.2 Case of high level languages
G.2.4.3 Limited variability languages (LVL)
G.2.5 Role of the tools [Go to Page]
G.2.5.1 General
G.2.5.2 Association between languages and tools
G.3 Guidance for tailoring the lifecycle [Go to Page]
G.3.1 Recommendations for tailoring the lifecycle
G.3.2 Tailoring principles
G.3.3 Fixed functionalities and configuration
G.3.4 Fixed functionalities and programming
G.3.5 Limited functionalities and configuration
G.3.6 Limited functionalities and programming
G.3.7 Open functionalities and configuration
G.3.8 Open functionalities and programming
Annex H (normative) Confidence in the usage of Software Off-line Support Tools [Go to Page]
H.1 Scope and conventions
H.2 Software off-line support tool usage confidence approach overview [Go to Page]
H.2.1 Software off-line support tool usage confidence objectives
H.2.2 Software off-line support tool confidence approach
H.2.3 Software off-line support tool usage confidence measures overview
H.3 Measures concerning software off-line support tool usage [Go to Page]
H.3.1 Software off-line support tool usage planning and qualification planning
H.3.2 Software off-line support tool classification in the usage context [Go to Page]
H.3.2.1 Software off-line support tool classification principle
H.3.2.2 Software off-line support tool impact classes
H.3.2.3 Software off-line support tool error impact detection/prevention levels
H.3.2.4 Software off-line support tool usage confidence
H.3.3 Software off-line support tool user documentation
H.3.4 Software off-line support tool integration and assessment in the usage environment
H.3.5 Software off-line support tool configuration management in the tool user context
H.3.6 Software off-line support tool operation
H.4 Measures concerning software off-line support tool development including verification [Go to Page]
H.4.1 Software off-line support tool development with avoidance of systematic faults
H.4.2 Confidence from software off-line support tool usage history [Go to Page]
H.4.2.1 Confidence from non-modified software off-line support tool usage history
H.4.2.2 Updates of software off-line support tools which have been previously qualified using confidence from usage history:
H.4.3 Software off-line support tool documentation and problem management
H.5 Required evidence for software off-line support tool usage confidence
Annex I (informative) Model Based Software Development and Verification Guidelines [Go to Page]
I.1 Objectives and scope of this annex
I.2 Rationale for this annex
I.3 Approach and relationship with the body of this document
I.4 Documentation
I.5 Safety lifecycle planning
I.6 Techniques and measures
I.7 Software safety requirements specification
I.8 Software architecture design
I.9 Requirements for software off-line support tools, including programming languages.
I.10 Detailed design and development
I.11 Code Implementation
I.12 Software module testing
I.13 Software integration testing
I.14 Model Verification
I.15 Model-Based verification
Annex J (Informative) Data Driven Systems [Go to Page]
J.1 General
J.2 Systems with Minimal Configurable Parameters
J.3 Systems with Comprehensive Configurability
J.4 Role of the tools [Go to Page]

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