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IEC 62278 Ed. 1.0
Railway applications - Specification and demonstration of reliability, availability, maintainability and safety (RAMS)


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General Product Information

Document Type Standard
Status Current
Publisher:    IEC
Committee TC 9



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$456.30
Published:   19 Sep 2002  
ISBN: 2-8318-6584-0
Pages: 159
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Published:   19 Sep 2002  
Delivery Time:   5-10 days
ISBN: 2-8318-6584-0
Pages: 159

Table of Contents

FOREWORD
INTRODUCTION
1  Scope
2  Normative references
3  Definitions
4  Railway RAMS
   4.1  Introduction
   4.2  Railway RAMS and quality of service
   4.3  Elements of railway RAMS
   4.4  Factors influencing railway RAMS
   4.5  Means to achieve railway RAMS requirements
   4.6  Risk
   4.7  Safety integrity
   4.8  Fail-safe concept
5  Management of railway RAMS
   5.1  General
   5.2  System life cycle
   5.3  Application of this standard
6  RAMS life cycle
   6.1  Phase 1: Concept
   6.2  Phase 2: System definition and application conditions
   6.3  Phase 3: Risk analysis
   6.4  Phase 4: System requirements
   6.5  Phase 5: Apportionment of system requirements
   6.6  Phase 6: Design and implementation
   6.7  Phase 7: Manufacturing
   6.8  Phase 8: Installation
   6.9  Phase 9: System validation (including safety 
        acceptance and commissioning)
   6.10 Phase 10: System acceptance
   6.11 Phase 11: Operation and maintenance
   6.12 Phase 12: Performance monitoring
   6.13 Phase 13: Modification and retrofit
   6.14 Phase 14: Decommissioning and disposal
Annex A (informative) Outline of RAMS specification - example
Annex B (informative) RAMS programme
Annex C (informative) Examples of parameters for railway
Annex D (informative) Examples of some risk acceptance principles
Annex E (informative) Responsibilities within the RAMS process 
        throughout the life cycle
Figures
Tables

Abstract

Provides Railway Authorities and railway support industry with a process which will enable the implementation of a consistent approach to the management of reliability, availability, maintainability and safety, denoted by the acronym RAMS. Processes for the specification and demonstration of RAMS requirements are the cornerstones of this standard. It aims to promote a common understanding and approach to the management of RAMS. Can be applied systematically by a Railway Authority and railway support industry, throughout all phases of the life cycle of a railway application, to develop railway specific RAMS requirements and to achieve compliance with these requirements. The systems-level approach defined by this standard facilitates assessment of the RAMS interactions between elements of complex railway applications

Scope

1.1 This International Standard

defines RAMS in terms of reliability, availability, maintainability and safety and their interaction;
defines a process, based on the system life cycle and tasks within it, for managing RAMS;
enables conflicts between RAMS elements to be controlled and managed effectively;
defines a systematic process for specifying requirements for RAMS and demonstrating that these requirements are achieved;
addresses railway specifics;
does not define RAMS targets, quantities, requirements or solutions for specific railway applications;
does not specify requirements for ensuring system security;
does not define rules or processes pertaining to the certification of railway products against the requirements of this standard;
does not define an approval process by the safety regulatory authority.

1.2 This International Standard is applicable

to the specification and demonstration of RAMS for all railway applications and at all levels of such an application, as appropriate, from complete railway routes to major systems within a railway route, and to individual and combined sub-systems and components within these major systems, including those containing software; in particular
to new systems,
to new systems integrated into existing systems in operation prior to the creation of this standard, although it is not generally applicable to other aspects of the existing system,
to modifications of existing systems in operation prior to the creation of this standard; although it is not generally applicable to other aspects of the existing system;
- at all relevant phases of the life cycle of an application;
- for use by Railway Authorities and railway support industry.

NOTE Guidance on the applicability is given in the requirements of this standard.

History

1ED 2002 [19/09/2002]

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