Keep Your Railway Embedded Software on Track with CENELEC Standards

Keep Your Railway Embedded Software on Track with CENELEC Standards

 

TÜV SÜD Certified Tool for EN 50128 Safety Related Development

Meeting rigorous standards for the railway industry requires both predictable and repeatable software operation. Railway industry requirements are defined by CENELEC, the European Committee for Electrotechnical Standardization. The three standards produced by CENELEC, EN 50126, EN 50128, and EN 50129 represent the backbone of the process of demonstrating safety of a railway system.

EN 50128 outlines the maximum probabilities of dangerous failure and the associated reductions in overall risk. It provides five different Software Integrity Levels (SIL) covering various embedded railway systems, ranging from SIL 0 for systems like management information that don't impact safety to SIL 5 for systems like those that control switching and signaling.

EN 50126 ensures that the embedded software is suitable for use in safety-critical settings. EN 50129 provides guidelines similar to EN 50128, but for the electronics systems used for signaling.

 

 

The standards EN 50128 Software for railway control and protection systems and EN 50129 Safety related electronic systems for signaling represent the railway application-specific interpretation of the international standard series - IEC 61508 (Functional safety of electrical/ electronic/programmable electronic safety-related systems).

The EN 50128 standard describes software safety integrity levels and identifies requirements for personnel and their responsibilities, lifecycle issues, and documentation. It gives detailed descriptions of objectives, input documents, output documents and requirements for software requirements specification, architecture, design and implementation, verification and testing as well as software/hardware integration, software validation, quality assurance, and maintenance.

EN51028 takes into account the five software integrity levels (SIL) that range from the very critical (SIL-4), such as safety signaling to the non-critical, such as management information systems (SIL-0).

Safety Integrity Level PROBABILITY OF DANGEROUS FAILURE RISK REDUCTION FACTOR
SIL 4 >=10-5 to 10-4 100,000 to 10,000
SIL 3 >=10-4 to 10-3 10,000 to 1,000
SIL 2 >=10-3 to 10-2 1,000 to 100
SIL 1 >=10-2 to 10-1 100 to 10

Definition of EN 50128 Safety Integrity Levels

Other standards based on IEC 61508 may implement either of two definitions of Safety Integrity Levels. The Demand Mode definition of IEC 61508 is reserved for systems which frequency of operation is intermittent (such as systems covered under EN 51028), while the Continuous Mode covers systems that are used in a sustained manner over a period of time. The following table provides the difference between the two definitions, and what a failure of the system may mean at different SIL levels.

 

SAFETY INTEGRITY LEVEL DEMAND MODE
("LOW DEMAND MODE")
CONTINUOUS MODE
("HIGH DEMAND MODE")
CONSEQUENCE OF A FAILURE
Level AVAILABILITY Probability of a failure on demand  Probability of a dangerous failure per hour  
  SIL 4 >99.99%  >=10-5 to 10-4  >=10-9 to 10-8 Potential for fatalities in the community
 SIL 3 99.9%  >=10-4 to 10-3 >=10-8 to 10-7  Potential for multiple fatalities
  SIL 2 99%-99.9%  >=10-3 to 10-2  >=10-7 to 10-6  Potential for major injuries or one fatality
  SIL 1 90-99%  >=10-2 to 10-1 >=10-6 to 10-5  Potential for minor injuries
 SIL 0 No Requirement  N/A

Ensuring Complete Embedded Software Testing

To ensure predictable software operation, organizations need to know they tested 100% of the application code. VectorCAST/Cover does this easily by collecting coverage information during system test activities. The tool allows you to determine adequacy of your system testing. If parts of the code are not covered, then perhaps more testing is required for those areas of the application.

Why System Testing Isn't Enough for 100% Reliability

System testing does not ensure 100% coverage because many functions have error-handling code, which can be difficult or impossible to stimulate using a fully integrated application. The solution is to perform unit and integration testing on those functions using VectorCAST/C++ or VectorCAST/Ada. Because VectorCAST/Cover shares coverage information with VectorCAST for C/C++ and VectorCAST for Ada, you can easily produce coverage reports showing the combined coverage from all of your test activities.

Compliance with Highest Railway Standards

Our tools have been successfully used by numerous clients that need to comply with rigorous industrial standards, including those used in the Railway industry.

System test alone is ineffective in enabling organizations to achieve customer demanded quality and meet market opportunity windows. To achieve...Read full story »

Axel Kehlenbeck, Sr. Analyst, Sentry Technology Group

Vector Software’s VectorCAST is the leading automated software test tool for safety critical embedded systems, targeting mil/aero, medical and transportation....Read full story »

Dan Mender, Vice President Business Development, Green Hills Software

VectorCAST is unique in that it provides us with the ability to increase the reliability and quality of our flight...Read full story »

Wayne Young, Software Principal Engineer, Honeywell ASCa Inc.

Although no hard cost saving metrics were generated comparing the use of VectorCAST/Ada vs. testing with other tools or testing...Read full story »

Mark Hall, Test Consultant, Lockheed Martin

We are very pleased to work with Vector Software. The VectorCAST integration with FreeRTOS provides a engineers with a professional-grade...Read full story »

Richard Barry, Director, Real time Engineers, Ltd.

We are delighted that Vector Software has integrated its industry-leading VectorCAST suite with AdaCore’s GNAT Pro Safety Critical product for...Read full story »

Jamie Ayre, Marketing Director, AdaCore

We evaluated a number of test tools and were impressed with the VectorCAST automated solution. Using VectorCAST/C++, we have significantly...Read full story »

Julieta Catania, Quality Manager, Tecme S.A.

Vector Software has a proven record of developing the most advanced dynamic software testing solutions that address the real needs...Read full story »

Neil Langmead, Chief Operating Officer, Emenda Software

The decision to use Vector Software's automated solution is driven by our need to achieve the highest levels of software...Read full story »

Fábio Assis, Director, XMobots Robotic Systems

Vector Software provides one of a kind capabilities to address the challenges of testing embedded software applications. Representing Vector Software...Read full story »

Uri Farkash, Director of EDA Operations, Advanced Semiconductor Technologies

Our confidence that VectorCAST will provide for our unit test needs is quite high and went beyond expectations.

Read full story »
Ronald L. Martinez, Information Technology, Raytheon Company

We are enthusiastic about the integration and partnership with such a high caliber test automation company such as Vector Software....Read full story »

Regg Struyk, Product Manager, Polarion Software

Overall, we reduced our testing effort 83% by using VectorCAST.

Read full story »
Taeyoung Noh, Quality Assurance Manager NEOS Project, MDS Technology

The capabilities of VectorCAST for unit/integration test and code coverage perfectly complement our existing static analysis solutions. Coupled with our...Read full story »

Neil Langmead, Chief Operating Officer, Emenda Software

The VectorCAST platform provides us with the tools we need to begin development of our newest generation of gas detectors....Read full story »

Don DeLauder, Director, Research and Development, Dräger

Vector Software’s VectorCAST product suite is now more integrated with TI’s Code Composer Studio IDE than ever before, offering users...Read full story »

John Stevenson, Product and Applications Manager, Texas Instruments

As part of our selection process we evaluated several freeware and commercially available off the shelf applications. We chose VectorCAST...Read full story »

Helen Muth, Senior Director of Engineering, MEI Group

We are excited to partner with Vector Software in offering developers a powerful, fully integrated solution for embedded systems development....Read full story »

William E. Lamie, President, Express Logic, Inc.

Trinity is committed to bringing the most innovative and advanced technologies in safety critical software development. We are convinced that...Read full story »

Jeff Chen, Vice President, Trinity Technologies

Our test tool evaluation team considered a number of other applications for software testing. We ultimately chose VectorCAST for its...Read full story »

Larry Rogers, Avionics Software Manager, Aurora Flight Sciences

Big Thanks for this extra-ordinary service!!!

Read full story »
Ronald L. Martinez, Information Technology, Raytheon Company

Vector Software's VectorCAST embedded software testing platform was identified as the ideal solution for developing critical software in compliance with...Read full story »

Dr. Stefan Kaneff, Managing Director, EUROS Embedded Systems

The VectorCAST tools have greatly reduced the time it takes to fully test our code. VectorCAST/Manage allows us to...Read full story »

Stanislav Fligl, Core Team Leader, ŠKODA ELECTRIC

With VectorCAST we are able to quickly apply state of the art unit testing...

Read full story »
Yves Schenker, Embedded Software Engineer, Helbling Technik

I would like to personally thank David Pierson for his hard work and dedication in helping us here at Northrop...Read full story »

Fernando Anguiano, Senior Staff Software Engineer, Northrop Grumman Aerospace Systems

With its broad support for target compilers and integrated testing capabilities the VectorCAST applications fit well in our current and...Read full story »

Sven Natus, Manager of Software Development , Fujitsu Semiconductor Europe

Vector Software’s integration with VxWorks Cert Platform further extends VectorCAST’s support for the comprehensive capabilities of the Wind River Workbench...Read full story »

Joe Wlad, Senior Director of Product Management, Wind River

The combined offering delivers an unparalleled solution for ensuring quality, reliability, and compliance in the development of critical software systems....Read full story »

Michael Carey, President, Polarion Software

Automation in testing is typically considered in the context of meeting safety or regulatory requirements. VectorCAST supports our goal of...Read full story »

Arun Devaray, Senior Software Manager, Visteon Electronics

We evaluated many embedded software testing tools during this process. We chose VectorCAST for its robust features and ease of...Read full story »

Pauline Ng, GM Engineering and Technologies, Flight Focus

Our leading solutions for Requirements Management, Quality Assurance, and ALM, optimally complement Vector Software’s advanced tools for automated software testing...Read full story »

Michael Carey, President, Polarion Software

The support we have received from Vector Software has been outstanding. Vector Software’s trainers and support staff consist of highly...Read full story »

Stanislav Fligl, Core Team Leader, ŠKODA ELECTRIC

With the time savings introduced by VectorCAST, final software development phases could be reached early, reducing the total project costs....Read full story »

Mauricio Ribeiro Barbieri, Software Engineer Manager, AEL Sistemas, A.S.

VectorCAST matches our development paradigm exactly. Therefore the tool was simple to set up and integrate into our development process....Read full story »

Sven Natus, Manager of Software Development, Fujitsu Semiconductor Europe

We decided to adhere to all the rules within MISRA and the QA.C tool made this extremely easy to achieve....Read full story »

Lee Jaques, Senior Software Engineer, Marshall Aerospace

We carefully evaluated a number of tools and we were very impressed with the level of automation provided by the...Read full story »

Steven Lincoln, C-130 Software Development Manager, Lockheed Martin Aeronautics

The VectorCAST testing environment is an ideal complement to the static analysis capabilities available in GNAT Pro, together providing a...Read full story »

Cyrille Comar, Managing Director, AdaCore

The open interfaces of VectorCAST give us the necessary flexibility to adapt VectorCAST to all needs in all our development...Read full story »

Sven Natus, Manager of Software Development, Fujitsu Semiconductor Europe

VectorCAST is a very important component in our embedded software development process allowing us to detect defects early and assure...Read full story »

Sven Natus, Manager of Software Development, Fujitsu Semiconductor Europe

VectorCAST is the premier dynamic software analysis tool for embedded applications. We are very pleased that our partner, Vector Software,...Read full story »

Mats Ullström, Product Director, IAR Systems

VectorCAST made our job a lot easier.

Read full story »
Taeyoung Noh, Quality Assurance Manager NEOS Project, MDS Technology

I have been using VectorCAST C/C++ on embedded realtime projects for over 3 years. Creating unit tests has been greatly...Read full story »

Alan Yorinks, Software Engineer, ITT Geospatial Systems

Our project requires compliance with DO-178B Level B, which will require stringent testing activities. We needed the best suite of...Read full story »

Vladimir Baburov, Director, VNIIRA-Navigator

We were impressed with Vector Software from the outset. VectorCAST provided excellent ease of use and functionality.

Read full story »
Chris Brown, Vice President of Engineering, Athena Technologies

Vector Software engineers were extremely helpful in supporting our goal to achieve DO-178B certification in short amount of time....Read full story »

Pauline Ng, GM Engineering and Technologies, Flight Focus

We evaluated VectorCAST based on very specific criteria that included the vendors’ experience in safety-critical embedded software testing and the...Read full story »

Michael Dalpiaz, Development Manager, Imaging Systems, Sirona Dental

Key to our decision was Vector Software's certification of VectorCAST for developing safety related software and its ability to integrate...Read full story »

Don DeLauder, Director, Research and Development, Dräger

Key to our selection of VectorCAST was that it offers a single software engineering platform that can manage process complexity...Read full story »

Stefan Sauerer, MBtech

See the Benefits of VectorCAST for Your Railway Application

If you would like to see how VectorCAST embedded testing tools improve performance in your exact testing environment, register today for a 30-day, fully-functional trial.

You may also arrange a demo for your railway project.