European Committee for Electrotechnical Standardization

Railway applications – The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) Part 1: Basic requirements and generic process - Incorporating corrigenda May 2006 and May 2010
 N EN 50126-1

Annotation

This European Standard:

— define RAMS in terms of reliability, availability, maintainability and safety and their interaction;

— defines a process, based on the system lifecycle 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 and approval process by the safety regulatory authority.

This European 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: