Risk estimation studies in the context of a machine control function

Marita Hietikko (Corresponding Author), Timo Malm, Jarmo Alanen

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)

    Abstract

    Nowadays the safety requirements of a machine are increasingly associated with programmable electronic control systems. Risk estimation is an essential part of risk analysis in a machine development process, because the categorisation and allocation of safety requirements is based on this. It is important to know how the risk estimation is performed, since wrong safety integrity level (SIL) or performance level (PL) selection may lead to multiple costs of the safety-related part of the control system. On the other hand, wrong PL or SIL selection can weaken the safety of the system. In this article, a risk estimation process of a safety-related control function is presented. Different groups carried out three case studies including risk estimation for the same safety-related control function of a machine. The results of the risk estimations of the groups differ from each other. The possible reasons for the variations are discussed.
    Original languageEnglish
    Pages (from-to)767-774
    Number of pages8
    JournalReliability Engineering and System Safety
    Volume96
    Issue number7
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed

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    Control systems
    Risk analysis
    Costs

    Keywords

    • Safety
    • Control system
    • Machine
    • Risk analysis
    • Risk estimation

    Cite this

    @article{7efdd1f120e6466cb6570988aea4304b,
    title = "Risk estimation studies in the context of a machine control function",
    abstract = "Nowadays the safety requirements of a machine are increasingly associated with programmable electronic control systems. Risk estimation is an essential part of risk analysis in a machine development process, because the categorisation and allocation of safety requirements is based on this. It is important to know how the risk estimation is performed, since wrong safety integrity level (SIL) or performance level (PL) selection may lead to multiple costs of the safety-related part of the control system. On the other hand, wrong PL or SIL selection can weaken the safety of the system. In this article, a risk estimation process of a safety-related control function is presented. Different groups carried out three case studies including risk estimation for the same safety-related control function of a machine. The results of the risk estimations of the groups differ from each other. The possible reasons for the variations are discussed.",
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    pages = "767--774",
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    Risk estimation studies in the context of a machine control function. / Hietikko, Marita (Corresponding Author); Malm, Timo; Alanen, Jarmo.

    In: Reliability Engineering and System Safety, Vol. 96, No. 7, 2011, p. 767-774.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Risk estimation studies in the context of a machine control function

    AU - Hietikko, Marita

    AU - Malm, Timo

    AU - Alanen, Jarmo

    PY - 2011

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    N2 - Nowadays the safety requirements of a machine are increasingly associated with programmable electronic control systems. Risk estimation is an essential part of risk analysis in a machine development process, because the categorisation and allocation of safety requirements is based on this. It is important to know how the risk estimation is performed, since wrong safety integrity level (SIL) or performance level (PL) selection may lead to multiple costs of the safety-related part of the control system. On the other hand, wrong PL or SIL selection can weaken the safety of the system. In this article, a risk estimation process of a safety-related control function is presented. Different groups carried out three case studies including risk estimation for the same safety-related control function of a machine. The results of the risk estimations of the groups differ from each other. The possible reasons for the variations are discussed.

    AB - Nowadays the safety requirements of a machine are increasingly associated with programmable electronic control systems. Risk estimation is an essential part of risk analysis in a machine development process, because the categorisation and allocation of safety requirements is based on this. It is important to know how the risk estimation is performed, since wrong safety integrity level (SIL) or performance level (PL) selection may lead to multiple costs of the safety-related part of the control system. On the other hand, wrong PL or SIL selection can weaken the safety of the system. In this article, a risk estimation process of a safety-related control function is presented. Different groups carried out three case studies including risk estimation for the same safety-related control function of a machine. The results of the risk estimations of the groups differ from each other. The possible reasons for the variations are discussed.

    KW - Safety

    KW - Control system

    KW - Machine

    KW - Risk analysis

    KW - Risk estimation

    U2 - 10.1016/j.ress.2011.02.009

    DO - 10.1016/j.ress.2011.02.009

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