Quantitative reliability estimation of a computer-based motor protection relay using Bayesian networks

Atte Helminen, Urho Pulkkinen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    10 Citations (Scopus)

    Abstract

    A quantitative reliability estimation of a computer-based motor protection relay is presented. The evidence used for the estimation consists of expert judgements on the development process and estimated operational experience of the computer-based system. The framework of Bayesian modelling and Bayesian networks was applied throughout the assessment. A prior reliability estimation of the motor protection relay was built using the expert judgements on the product development process. The prior estimation was updated by taking into account the estimated operational experience for successive software versions. Prior estimations for possible reliability changes between different software versions were included to the assessment using the expert judgements on the version management of the motor protection relay. The Bayesian networks seem to provide an excellent way of performing quantitative reliability estimations of computer-based systems. Bayesian networks are particularly useful when different kinds of evidence is introduced and combined in the same assessment. The assessment method described in the paper gives informative posterior probability distributions for the failure rates of different software versions. The methodology can be used as a communicative tool between different participants debating on the reliability of a system and as a follow-up of reliability trend during the life cycle of a computer-based system.
    Original languageEnglish
    Title of host publicationComputer Safety, Reliability, and Security
    PublisherSpringer
    Pages92-102
    ISBN (Electronic)978-3-540-39878-3
    ISBN (Print)978-3-540-20126-7
    DOIs
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    Event22nd International Conference on Computer Safety, Reliability, and Security, SAFECOMP 2003 - Edinburgh, United Kingdom
    Duration: 23 Sep 200326 Sep 2003

    Publication series

    SeriesLecture Notes in Computer Science
    Volume2788
    ISSN0302-9743

    Conference

    Conference22nd International Conference on Computer Safety, Reliability, and Security, SAFECOMP 2003
    CountryUnited Kingdom
    CityEdinburgh
    Period23/09/0326/09/03

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  • Cite this

    Helminen, A., & Pulkkinen, U. (2003). Quantitative reliability estimation of a computer-based motor protection relay using Bayesian networks. In Computer Safety, Reliability, and Security (pp. 92-102). Springer. Lecture Notes in Computer Science, Vol.. 2788 https://doi.org/10.1007/978-3-540-39878-3_8