Integration of semiqualitative and qualitative safety models

Mirko Dohnal, Raija Koivisto, J. Vystrcil

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)


    Integration of a qualitative submodel, qualitative query, semiqualitative submodel (see Ref. 6) and semiqualitative query is described. The resulting hybrid model represents the optimal trade-off between the accuracy of semiqualitative modelling and the flexibility of qualitative common sense. Hybrid modelling can eliminate many spurious solutions.
    A general integration approach is represented by an algorithm which iteratively eliminates impossible qualitative and semiqualitative combinations.
    An example (chemical reactor and two-level control system) is used to demonstrate how numbers of, for example, qualitative states (solutions) are decreased by semiqualitative submodels.
    Original languageEnglish
    Pages (from-to)33-38
    JournalReliability Engineering and System Safety
    Issue number1
    Publication statusPublished - 1992
    MoE publication typeA1 Journal article-refereed


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