A Study on the Risk based RAMS Assessment for Railway Rolling Stock Systems

철도차량시스템의 위험기반 RAMS 평가에 관한 연구

Park, Mun-Gyu;Han, Seong-Ho

  • Received : 2015.05.30
  • Accepted : 2015.11.02
  • Published : 2015.12.01


Rolling stock RAMS is a field of engineering which integrates reliability, availability, maintainability and safety (RAMS) characteristics into an inherent product design property through rolling stock system engineering process. It is implemented to achieve operational objectives successfully, and recently the RAMS has become a rapidly growing engineering discipline because it has a great potential to ensure safety and improve cost effectiveness. However, the Korean rolling stock industry has not yet implemented RAMS management in the rolling stock engineering process, despite the issue having been addressed since the introduction of the KTX. Thus, this paper discusses the processes, methods and techniques for RAMS assessment in three parts. Firstly, it outlines a process of the overall RAMS performance assessment for achieving technical RAMS design criteria. Secondly, it discusses a process for assessing the operational RAM and allocating the RAM. This paper also proposes a model for assessing safety-based risk management, which includes five analytic techniques for identifying the causes and consequences of a system failure. Finally, a case example is provided for the risk assessment of the pneumatic braking device.


RAMS (reliability, availability, maintainability and safety);Rolling stock engineering;Risk management;Assessment;Allocation;Safety


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Supported by : 국토교통부