FMEA and Fault Tree based Software Safety Analysis of a Railroad Crossing Critical System

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Ben Swarup Medikonda
Ben Swarup Medikonda
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Dr. Ben Swarup Medikonda P. Seetha Ramaiah  Anu A. Gokhale
Dr. Ben Swarup Medikonda P. Seetha Ramaiah Anu A. Gokhale
α Andhra University Andhra University

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FMEA and Fault Tree based Software Safety Analysis of a Railroad Crossing Critical System

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Abstract

Software for safety-critical systems must deal with the hazards identified by safety analysis in order to make the system safe, risk-free and fail-safe. Certain faults in critical systems can result in catastrophic consequences such as death, injury or environmental harm. The focus of this paper is an approach to software safety analysis based on a combination of two existing fault removal techniques. A comprehensive software safety analysis involving a combination of Failure Modes and Effects Analysis (FMEA) and Fault Tree Analysis (FTA) is conducted on the software functions of the critical system to identify potentially hazardous software faults. A prototype safety-critical system -Railroad Crossing Control System (RCCS), incorporating a microcontroller and software to operate the train on a track circuit is described.

References

12 Cites in Article
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  2. John Knight (2002). Safety critical systems.
  3. N Leveson,C Turner (1987). An investigation of the Therac-25 accidents.
  4. James Gleick (1996). New York Times Economic Security Poll, December 1996.
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  6. (1012). IEEE standard for software verification and validation plans.
  7. N Leveson Safeware (1995). System Safety and Computers.
  8. Debra Herman (2000). Software Safety and Reliability Basics.
  9. EN50128 Railway Applications: Software for Railway Protection and Control Systems.
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  12. Alan Tribble (2002). Software Safety Analysis of a Flight Guidance System.

Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Ben Swarup Medikonda. 1970. \u201cFMEA and Fault Tree based Software Safety Analysis of a Railroad Crossing Critical System\u201d. Unknown Journal GJCST Volume 11 (GJCST Volume 11 Issue 8): .

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May 7, 2011

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en
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Software for safety-critical systems must deal with the hazards identified by safety analysis in order to make the system safe, risk-free and fail-safe. Certain faults in critical systems can result in catastrophic consequences such as death, injury or environmental harm. The focus of this paper is an approach to software safety analysis based on a combination of two existing fault removal techniques. A comprehensive software safety analysis involving a combination of Failure Modes and Effects Analysis (FMEA) and Fault Tree Analysis (FTA) is conducted on the software functions of the critical system to identify potentially hazardous software faults. A prototype safety-critical system -Railroad Crossing Control System (RCCS), incorporating a microcontroller and software to operate the train on a track circuit is described.

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FMEA and Fault Tree based Software Safety Analysis of a Railroad Crossing Critical System

Dr. Ben Swarup Medikonda P. Seetha Ramaiah  Anu A. Gokhale
Dr. Ben Swarup Medikonda P. Seetha Ramaiah Anu A. Gokhale

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