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BSI 24/30437805 DC 2024

BSI 24/30437805 DC 2024

$18.97

BS IEC 62278-1 Railway applications – Specification and demonstration of reliability; availability; maintainability and safety (RAMS) – Part 1: Generic RAMS process

Published By Publication Date Number of Pages
BSI 2024 103
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PDF Catalog

PDF Pages PDF Title
10 FOREWORD
12 INTRODUCTION
13 1 Scope
14 2 Normative references
3 Terms and definitions
25 4 Abbreviations
26 5 Railway RAMS
5.1 Introduction
27 5.2 Multi-level System approach
5.2.1 Concepts of system hierarchy
28 Figure 1 — Illustration of system hierarchy
5.2.2 System requirements and characteristics
29 5.2.3 Defining a system
5.3 Railway system overview
5.3.1 Introduction
5.3.2 Stakeholders involved in a railway system
30 5.3.3 Railway system structure and apportionment of RAMS requirements
5.4 Railway RAMS and quality of service
Figure 2 – Quality of Service and Railway RAMS.
31 5.5 Elements of railway RAMS
Figure 3 — Interrelation of railway RAMS elements
33 Figure 4 — Effects of failures within a system
5.6 Factors influencing railway RAMS
5.6.1 General
5.6.2 Classes of failures
34 5.6.3 Derivation of detailed railway specific influencing factors
35 Figure 5 — Factors Influencing Railway RAMS
37 Figure 6 — Example of deriving cause/effect relations in a diagrammatic approach0F )
38 5.6.4 Human factors
40 5.7 Specification of railway RAMS requirements
5.7.1 General
5.7.2 RAMS specification
5.8 Risk based approach
41 5.9 Risk reduction strategy
5.9.1 Introduction
5.9.2 Reduction of risks related to safety
42 5.9.3 Reduction of risks related to RAM
6 Management of railway RAMS – general requirements
6.1 Introduction
43 6.2 Life cycle for the system under consideration
44 Figure 7 — Interrelation of RAMS management process and system life cycle
45 Figure 8 — The V-cycle representation
47 Table 1 (informative) — RAMS tasks for lifecycle phases 1 to 12
51 6.3 Risk assessment
52 Figure 9 — Process for Risk Assessment related to phases 3 and 4 (as per safety)
6.4 Organisational requirements
6.4.1 Introduction
53 6.4.2 Requirements
6.5 Application of this document and adaptability to project scope and size
6.5.1 General requirements
55 6.5.2 Case of complex systems with different hierarchical levels
Figure 10 — Example of lifecycles at different hierarchical levels
56 6.5.3 Renewal within existing systems
6.5.4 Re-use or adaptation of a system with previous acceptance
6.6 General requirements on RAMS documentation
57 6.7 Verification and validation
6.7.1 Introduction
6.7.2 Verification
58 6.7.3 Validation
59 6.8 Independent Safety Assessment
6.8.1 Objectives
6.8.2 Activities
61 7 RAMS life cycle
7.1 General
7.2 Phase 1: Concept
7.2.1 Objectives
7.2.2 Activities
7.2.3 Deliverables
62 7.3 Phase 2: System definition and operational context
7.3.1 Objectives
7.3.2 Activities
7.3.2.1 General
63 7.3.2.2 RAM Plan
64 7.3.2.3 Safety Plan
66 7.3.3 Deliverables
7.4 Phase 3: Risk analysis and evaluation
7.4.1 Objectives
7.4.2 Activities
7.4.2.1 Risk assessment
67 Figure 11 — Relationship of cause, hazard and accident
69 7.4.2.2 Hazard Log
7.4.3 Deliverables
70 7.5 Phase 4: Specification of system requirements
7.5.1 Objectives
7.5.2 Activities
71 7.5.3 Deliverables
7.5.4 Specific validation tasks
72 7.6 Phase 5: Architecture and apportionment of system requirements
7.6.1 Objectives
7.6.2 Activities
73 7.6.3 Deliverables
7.7 Phase 6: Design and Implementation
7.7.1 Objectives
7.7.2 Activities
74 7.7.3 Deliverables
75 7.7.4 Specific verification tasks
7.8 Phase 7: Manufacture
7.8.1 Objectives
7.8.2 Activities
76 7.8.3 Deliverables
7.9 Phase 8: Integration
7.9.1 Objectives
7.9.2 Activities
77 7.9.3 Deliverables
7.9.4 Specific verification tasks
78 7.10 Phase 9: System Validation
7.10.1 Objectives
7.10.2 Activities
7.10.3 Deliverables
79 7.11 Phase 10: System acceptance
7.11.1 Objectives
80 7.11.2 Activities
7.11.3 Deliverables
7.12 Phase 11: Operation, maintenance and performance monitoring
7.12.1 Objectives
7.12.2 Activities
83 7.12.3 Deliverables
7.12.4 Specific verification tasks
84 7.13 Phase 12: Decommissioning
7.13.1 Objectives
7.13.2 Activities
7.13.3 Deliverables
8 Safety Case
8.1 Purpose of a safety case
85 8.2 Content of a safety case
86 Annex A (informative) RAMS plan
A.1 General
A.2 Procedure
A.3 Basic RAMS plan example
87 Table A.1 — Example of a basic RAMS plan outline
88 A.4 List of techniques
90 Annex B (informative) Examples of parameters for railway
B.1 General
B.2 Reliability parameters
Table B.1 — Examples of reliability parameters
B.3 Maintainability parameters
91 Table B.2 — Examples of maintainability parameters
B.4 Availability parameters
Table B.3 — Examples of availability parameters
93 a) corrective maintenance
b) preventive maintenance
B.5 Logistic support parameters
94 Table B.4 — Examples of logistic support parameters
B.6 Safety parameters
Table B.5 — Examples of safety performance parameters
95 Annex C (informative) Risk matrix calibration and risk acceptance categories
C.1 General
C.2 Frequency of occurrence categories
96 Table C.1 — Frequency of occurrence of hazardous events with examples for quantification (time based)
97 Table C.2 — Frequency of occurrence of events with examples for quantification (distance based)
C.3 Severity categories
Table C.3 — Severity categories (example related to RAM)
Table C.4 — Severity categories (example 1 related to RAMS)
98 Table C.5 — Severity categories (example 2 related to Safety)
Table C.6 — Financial severity categories (example)
C.4 Risk acceptance categories
Table C.7 — Risk acceptance categories (example 1 for binary decisions)
Table C.8 — Risk acceptance categories (example 2)
99 Table C.9 — Risk acceptance categories (example related to safety)
Table C.10 — Risk acceptance categories (example related to RAM)
100 Annex D (informative) Guidance on system definition
D.1 General
D.2 System Definition in an iterative system approach
D.3 Method for defining the structure of a system
D.3.1 General
D.3.2 Function List
D.3.3 Functional breakdown
101 Table D.1 — Typical examples for a functional breakdown
D.4 Parties/stakeholders/boundaries of systems
D.5 Guidance on the content of a system definition
103 Bibliography

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