Journals / Demiryolu Mühendisliği / 2026 / Sayı: 23

Comparison and Harmonization of RAMS Management According to EN 50126-1 and Common Safety Methods According to CSM-RA 402/2013: A Case Study on the ETCS Odometer Function

EN 50126-1 Standardına Göre RAMS Yönetimi ve CSM-RA 402/2013’e Göre Ortak Emniyet Yönteminin Karşılaştırılması ve Ortaklaştırılması: ETCS Sistemi Odometre Fonksiyonu Örnek Çalışması

Kemal Faruk Doğan(RAGEM RAYLI SİSTEMLER ARAŞTIRMA GELİŞTİRME EĞİTİM VE MÜHENDİSLİK HİZMETLERİ LİMİTED ŞİRKETİ)0009-0004-2893-1904
Pages
93–104
Publication Date
2026-01-20
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

As a result, the applicability of standard-based RAMS management and regulation-based CSM-RA process together has been demonstrated, and the effectiveness of this inclusive approach in providing safety assurance in complex safety-critical railway systems has been revealed.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:With the development of railway technologies, the complexity and functional dependencies of systems are increasing; this situation makes it mandatory to address the RAMS Management with more structured and systematic approaches.
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Key Findings & Data:Worldwide, this requirement is widely met within the framework of a comprehensive system life cycle model with the EN 50126-1 standard.
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Conclusion & Impact:As a result, the applicability of standard-based RAMS management and regulation-based CSM-RA process together has been demonstrated, and the effectiveness of this inclusive approach in providing safety assurance in complex safety-critical railway systems has been revealed.
🔬Design:Modeling & Simulation
📍Scope:2013 Verileri
⚙️Variables:RAMS · Emniyet · ETCS

Abstract

With the development of railway technologies, the complexity and functional dependencies of systems are increasing; this situation makes it mandatory to address the RAMS Management with more structured and systematic approaches. Worldwide, this requirement is widely met within the framework of a comprehensive system life cycle model with the EN 50126-1 standard. In addition, the CSM-RA 402/2013/EU regulation, which has become mandatory for all new and significant changes subject to European Union legislation, provides a common safety method based on systematic risk analysis and risk acceptance principles. Although both approaches have different origins, they create an inclusive structure in systematic risk management, traceability, and safety assurance processes. In this study, RAMS management according to EN 50126-1 and the common safety assessment process carried out according to CSM-RA 402/2013 are compared at a technical level, and the principles of harmonization are addressed in terms of requirement structures, analysis approaches, and documentation outputs. The comparative analysis is concretized with an applied case study on the odometer function within the ETCS (European Train Control System). As a result, the applicability of standard-based RAMS management and regulation-based CSM-RA process together has been demonstrated, and the effectiveness of this inclusive approach in providing safety assurance in complex safety-critical railway systems has been revealed.

Özet

Demiryolu teknolojilerinin gelişimiyle birlikte, sistemlerin karmaşıklığı ve fonksiyonel bağımlılıkları artmakta; bu durum, güvenilirlik, emre amadelik, idame ettirilebilirlik ve emniyet (RAMS) yönetiminin daha yapılandırılmış ve sistematik yaklaşımlarla ele alınmasını zorunlu kılmaktadır. Dünya genelinde yaygın olarak bu gereksinim EN 50126-1 standardı ile kapsamlı bir sistem yaşam döngüsü modeli çerçevesinde karşılanmaktadır. Bununla birlikte, Avrupa Birliği mevzuatına tabi tüm yeni ve önemli değişiklikler için zorunlu hale gelen CSM-RA 402/2013/EU düzenlemesi, sistematik risk analizi ve risk kabul prensiplerine dayalı bir ortak emniyet yöntemi sunmaktadır. Her iki yaklaşım da farklı kökenlere sahip olmakla birlikte, sistematik risk yönetimi, izlenebilirlik ve emniyet ispatı süreçlerinde kapsayıcı bir yapı oluşturmaktadır. Bu çalışmada, EN 50126-1 standardına göre RAMS yönetimi ile CSM-RA'ya göre yürütülen ortak emniyet değerlendirme süreci teknik düzeyde karşılaştırılmış, gereksinim yapıları, analiz yaklaşımları ve dokümantasyon çıktıları yönüyle ortaklaştırma ilkeleri ele alınmıştır. Karşılaştırmalı analiz, Avrupa Tren Kontrol Sistemi (ETCS) içindeki odometre fonksiyonu özelinde uygulamalı bir vaka çalışması ile somutlaştırılmıştır. Sonuç olarak, standarda dayalı RAMS yönetimi ile mevzuata dayalı CSM-RA sürecinin birlikte uygulanabilirliği gösterilmiş, bu kapsayıcı yaklaşımın karmaşık emniyet-kritik demiryolu sistemlerinde emniyet güvencesi oluşturmadaki etkinliği ortaya konulmuştur.

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Cite This Article

Balaban, M., Doğan, K. F., Gündüz, S., Tunçez, A. (2026). Comparison and Harmonization of RAMS Management According to EN 50126-1 and Common Safety Methods According to CSM-RA 402/2013: A Case Study on the ETCS Odometer Function. Demiryolu Mühendisliği, Sayı: 23, 93–104. https://doi.org/10.47072/demiryolu.1842986

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References (10)

  1. EN 50126‑1:2017+A1:2024, Railway applications — The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS), Part 1: Generic RAMS process
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