International Electrotechnical Commission

Railway Applications   Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Edition 1.0
 N 62278

Annotation

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.

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