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

? 2011 Ben Swarup Medikonda, P. Seetha Ramaiah, Anu A. Gokhale. This is a research/review paper, distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License /licenses/by- nc/3.0/), permitting all non-commercial use, distribution, and reproduction inany medium, provided the original work is properly cited. Global Journal of Computer Science and Technology Volume 11 Issue 8 Version 1.0 May 2011 Type: Double Blind Peer Reviewed International Research Journal Publisher: Global Journals Inc. (USA) ISSN: 0975-4172 Print ISSN: 0975-4350 FMEA and Fault Tree based Software Safety Analysis of a Railroad Crossing Critical System By Ben Swarup Medikonda, P. Seetha Ramaiah, Anu A. Gokhale Andhra University 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. Keywords: GJCST Classification: K.4.1, J.7 FMEA and Fault Tree based Software Safety Analysis of a Railroad Crossing Critical System Strictly as per the compliance and regulations of: Software safety, safety-critical systems, software faults, software safe