RAMS
|
DIN EN 50126 |
|---|---|
| Area | Railway applications |
| title | Specification and proof of reliability, availability, maintainability, safety (RAMS) |
| Brief description: | RAMS |
| Latest edition | 2018-10 |
| ISO | - |
RAMS is the abbreviation for the term packet " Reliability , Availability , Maintainability , Safety " (in English: Reliability, Availability, Maintainability, Safety - hence the acronym). This definition can be found in the CENELEC standard EN 50126, which is also published as a DIN standard . TheEN 50126 standard is constantly being expanded and modified by the European Committee for Electrotechnical Standardization, CENELEC ( Comité Européen de Normalization Electrotechnique ). RAMSST also includes "security", the protection of the system against attacks from outside, and "testability", the degree to which a system supports the test in a given test context.
The connection between these RAMS terms is becoming increasingly important in all industrial sectors with high investment volumes and risk potential . It is used especially in the railway industry for the system specification of safety systems in the railway industry. The associated management system is often referred to as Integrated Logistics Support .
According to the definition of EN 50126, RAMS is a process or a methodology that is intended to help prevent errors as early as the planning phase of projects. RAMS can be used in the development and introduction of new products, but also in the planning and implementation of new systems. A RAMS Management ensures that systems defined risk analysis (see Probabilistic Safety Analysis ) performed hazard rates determined, made detailed checks and safety cases are created.
The goals of safety and availability in operation can only be achieved if the reliability and maintainability requirements are constantly met and the ongoing long-term maintenance work and the operational environment are monitored. Availability is based on the knowledge of the reliability, based on the system failure rates (RAM analysis), the probability of a failure occurring ( fault tree analysis ) and on the knowledge of the maintainability, based on the knowledge of the Repair times .
The RAMS process also considers the analysis of possible hazards (Hazard and Operability Study) as well as the effect of a failure on the functionality of a system ( FMEA (CA)). It is only completed when a product has been taken out of service and disposed of.
So far, two corrections have been published to the standard. Corrigendum 1 changes the title and number of the standard. In Corrigendum 2, Annex ZZ is added by CENELEC.
In October 2018, DIN EN 50126 including both corrections was withdrawn and replaced by a new two-part standard: DIN EN 50126-1: 2018-10, part 1: Generic RAMS process and DIN EN 50126-2: 2018-10, part 2 : System related safety methodology. This includes the guidelines for the application of EN 50126-1 for rail vehicles RAM: PD CLC / TR 50126-3: 2008-09-30, which is currently only available in English.
Web links
- System Safety , Norwegian University of Science and Technology
- EN 50126 / IEC 62278 , Quick Guide to Safety Management
- GUIDELINE for LCC and RAMS analysis , EU Project INNOTRACK (Innovative Track Systems)
Individual evidence
- ↑ DIN EN 50126 amendment 1: 2006-09; VDE 0115-103 Correction 1: 2006-09. Beuth Verlag GmbH website. Retrieved January 6, 2019.
- ↑ DIN EN 50126 Correction 2: 2011-01; VDE 0115-103 Correction 2: 2011-01. Beuth Verlag GmbH website. Retrieved January 6, 2019.
- ↑ DIN EN 50126-1: 2018-10; VDE 0115-103-1: 2018-10. Beuth Verlag GmbH website. Retrieved January 6, 2019.
- ↑ DIN EN 50126-2: 2018-10; VDE 0115-103-2: 2018-10. Beuth Verlag GmbH website. Retrieved January 6, 2019.
- ↑ PD CLC / TR 50126-3: 2008-09-30 . Beuth Verlag GmbH website. Retrieved January 6, 2019.