Software Failure Probability Quantification for System Risk Assessment

Kang, Hyun Gook; Eom, Heung-Seop; Son, Han Seong

doi:https://doi.org/10.3814/2009/163456

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Research Article | Open Access

Volume 2009 | Article ID 163456 | https://doi.org/10.3814/2009/163456

Software Failure Probability Quantification for System Risk Assessment

Hyun Gook Kang,¹Heung-Seop Eom,¹and Han Seong Son²

Received09 Jun 2009

Accepted19 Aug 2009

Published03 Nov 2009

Abstract

Risk caused by safety-critical I&C systems considerably affects overall plant risk. Software failures in digitalized I&C systems must be considered as the cause of risk. As digitalization of safety-critical systems progresses, the need for software failure probability quantification increases. For the software of safety-critical systems, very high reliability is required. This article aims at providing an overview of promising software failure probability quantification models for this kind of safety-critical system: The software reliability growth model (SRGM), the input-domain-based test model (IDBT), and the validation/verification quality model (VVQM). In order to accommodate the characteristics of safety-critical systems, a more effective framework of practical risk assessment applications is necessary. In this article, we propose the combined use of SRGM&VVQM for a more systematic and traceable method of the failure probability quantification of safety-critical software.

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Copyright © 2009 Hyun Gook Kang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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