In the last decade, the railway sector has been searching for strategies to implement models that provide parameterisation of the risk levels of new technological challenges.
New European standards such as EN 50126, 50128 and 50129 provide railway managers and the railway industry a consistent approach to manage reliability, availability, maintainability and safety (RAMS); providing a common management approach to facilitate the interoperability of European railways.
Infrastructure managers and operators of EU Member States had to make a major effort to gradually adopt the rules defined in terms of safety management.
The main aim of this project was to offer Spanish railway authorities a methodology and evaluation risk criteria to obtain, for each different subsystem, the composition of the railway and the assumed risk level in order to apply the current RAMS standard (EN 50126).
In Spain, there was insufficient information to apply these standards (EN 50126, 50128 and 50129) and in many cases the production of this information was not immediate. The project gathered the necessary information to fulfil of the project objectives.
Although these European standards detail the techniques and methods used to achieve the required RAMS (reliability, availability, maintainability and safety), different concepts, terms and values already exist, that should be defined by the competent railway authority. Therefore, the methodology upon which this project is based focuses on is the establishment of the acceptance criteria of risk level to be used or the values of tolerable risk index (THR) admitted to a railway system, as well as the values of integrity associated.