This session will explore different system safety methodologies and how they can be used to define system risk. The presentations will cover a broad range of topics from subsystem testing up through evaluation of commercial new business decision-making.
Papers: 14B1 [0131] CODE OF PRACTICES & SAFETY RELATED ITEMS LIST (SRIL) IN RAILWAY INDUSTRY by Jacques J. Durand, Alstom Transport
The so called Safety Critical Items List (SCIL) concept of our MIL-STD-882 standard has been revisited by the rail Industry to highlight the requirements for the quality inspection (in-house and/or incoming inspection), for purchasing specifications, for special care in assembling and testing subsystems and equipment, and for preventative maintenance.
14B2 [0075] USING RISK ASSESSMENT TO MITIGATE NEW BUSINESS DEMANDS UNCERTAINTIES by Luciano Gomes and Carlos Alberto Scapin, INDG – Institute for Managerial Development
To be eligible to enter in the global market, companies need to comply with legal and regulatory requirements and international norms besides of products reliability. Those requirements are regulated by contracts between companies that impose several penalties for non-accomplishment with them. This paper will explore a technique of Risk Assessment to mitigate new business demands uncertainties by integration of FTA, cut sets probabilities, Cost Risk Simulation and QFD matrix.
14B3 [0111] AN ACCIDENT ANALYSIS MODEL ORIENTED TO COMPLEX TASKS PROCESS by Xiaolei Li, Tingdi Zhao, Ph.D., Mei Rong, Beihang University
Based on summing up the existing accident models and analyzing the characteristics of complex systems, a new accident analysis model oriented to complex tasks process is presented in this paper. This model expounds the cause of the accident by analyzing the complex process and multi-factor coupling. Also, this paper proposes the systematic method on the technical level for the model, such as a new method, process breakdown structure (PBS) and the mode of multi-factor coupling.
14B4 [0064] PROBABILITY OF FAILURE OF SAFETY-CRITICAL SYSTEMS SUBJECT TO PARTIAL TESTSby Florent Brissaud, INERIS, Anne Barros, Christophe Berenguer, Ph.D., Universite de technologie de Troyes/CNRS-LM2
A set of general formulas are proposed for the availability assessment of MooN architecture (i.e. k-out-of-n) systems made up by homogeneous components and subject to partial and proof tests. Partial tests may detect only some system failures, whereas proof tests allow restoring the system to an as good as new condition. Analyses show that the average probability of system failure on demand can be improved, just by a better non-periodic distribution of partial tests.
Evaluation of Risk Through System Safety
Session:Â 14B, Thursday, 28 January 2010, 1015-1215
Moderator:Â Warren Naylor, Northrop Grumman
This session will explore different system safety methodologies and how they can be used to define system risk. The presentations will cover a broad range of topics from subsystem testing up through evaluation of commercial new business decision-making.
Papers:
14B1 [0131] CODE OF PRACTICES & SAFETY RELATED ITEMS LIST (SRIL) IN RAILWAY INDUSTRY
by Jacques J. Durand, Alstom Transport
The so called Safety Critical Items List (SCIL) concept of our MIL-STD-882 standard has been revisited by the rail Industry to highlight the requirements for the quality inspection (in-house and/or incoming inspection), for purchasing specifications, for special care in assembling and testing subsystems and equipment, and for preventative maintenance.
14B2 [0075] USING RISK ASSESSMENT TO MITIGATE NEW BUSINESS DEMANDS UNCERTAINTIES
by Luciano Gomes and Carlos Alberto Scapin, INDG – Institute for Managerial Development
To be eligible to enter in the global market, companies need to comply with legal and regulatory requirements and international norms besides of products reliability. Those requirements are regulated by contracts between companies that impose several penalties for non-accomplishment with them. This paper will explore a technique of Risk Assessment to mitigate new business demands uncertainties by integration of FTA, cut sets probabilities, Cost Risk Simulation and QFD matrix.
14B3 [0111] AN ACCIDENT ANALYSIS MODEL ORIENTED TO COMPLEX TASKS PROCESS
by Xiaolei Li, Tingdi Zhao, Ph.D., Mei Rong, Beihang University
Based on summing up the existing accident models and analyzing the characteristics of complex systems, a new accident analysis model oriented to complex tasks process is presented in this paper. This model expounds the cause of the accident by analyzing the complex process and multi-factor coupling. Also, this paper proposes the systematic method on the technical level for the model, such as a new method, process breakdown structure (PBS) and the mode of multi-factor coupling.
14B4 [0064] PROBABILITY OF FAILURE OF SAFETY-CRITICAL SYSTEMS SUBJECT TO PARTIAL TESTS by Florent Brissaud, INERIS, Anne Barros, Christophe Berenguer, Ph.D., Universite de technologie de Troyes/CNRS-LM2
A set of general formulas are proposed for the availability assessment of MooN architecture (i.e. k-out-of-n) systems made up by homogeneous components and subject to partial and proof tests. Partial tests may detect only some system failures, whereas proof tests allow restoring the system to an as good as new condition. Analyses show that the average probability of system failure on demand can be improved, just by a better non-periodic distribution of partial tests.