standard byInternational Electrotechnical Commission , 07/01/2025
IEC 62278-1:2025, Addresses railway specifics, enables conflicts between RAMS elements to be controlled and managed effectively.
This document specifies:
a) a process, based on the system life cycle and tasks within it, for managing RAMS;
b) a systematic process, tailorable to the type and size of the system under consideration, for specifying requirements for RAMS and demonstrating that these requirements are achieved.
This document does not specify:
c) RAMS targets, quantities, requirements or solutions for specific railway applications;
d) rules or processes pertaining to the certification of railway products against the requirements of this document;
e) an approval process for the railway stakeholders.
This document is applicable to railway application fields, including signalling, rolling stock and fixed installations, and specifically:
f) to the specification and demonstration of RAMS for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined subsystems and components within these major systems, including those containing software; in particular:
1) to new systems;
2) to new systems integrated into existing systems already accepted, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system;
3) as far as reasonably practicable, to modifications and extensions of existing systems already accepted, but only to the extent and insofar as existing systems are being modified. It is otherwise not applicable to any unmodified aspect of the existing system;
g) at all relevant phases of the life cycle of an application;
h) for use by railway duty holders and the railway suppliers.
This document is not applicable to:
i) any unmodified aspects of the existing system;
j) existing systems which remain unmodified, including those systems already compliant with IEC 62278:2002.
