Safety Assessment of Process Systems using Fuzzy Extended Bow Tie (FEBT) Model

Esmaeil Zarei, Mohammad Yazdi*, Nima Khakzad, Genserik Reniers

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
42 Downloads (Pure)


Risk analysis in process systems is very important to design effective strategies for preventing and mitigating potential major accidents. Although conventional techniques as Bow-tie (BT) have widely been used in risk assessment of process systems, they fall short in effectively modelling epistemic uncertainty which is prevailing in risk assessment of process systems. The present study is aimed at alleviating this shortcoming by incorporating fuzzy set theory into BT, developing a so-called fuzzy extended Bow tie (FEBT) model. FEBT, compared with previous fuzzy BT methods, uses the intuitionistic fuzzy numbers and thus provides a more accurate cause – consequence model of accident scenarios. A natural gas transmission network is used to demonstrate the application of FEBT.

Original languageEnglish
Pages (from-to)1027-1032
Number of pages6
JournalChemical Engineering Transactions
Publication statusPublished - 2019


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