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Developments in SIL determination and calculation

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  • Gabriel, Angelito
  • Ozansoy, Cagil
  • Shi, Juan

Abstract

Recent developments in technology and the move towards efficient utilisation of resources have inspired researchers and practitioners to come up with cost-effective approaches to Safety Integrity Level (SIL) determination and calculation as the current methods are too cumbersome and time-consuming. The bottom line is meeting the organisation's safety requirements in an economical manner regardless of methodology employed without sacrificing accuracy. This paper proposes the Funnel Risk Graph Method (FRGM) as a funnel technique to assess lower SIL ratings, whilst more complex methods can be applied on higher SILs with caution. A review of various target SIL determination and calculation methods in the life cycle of a Safety Instrumented System (SIS) is also presented and compared as per the criteria of relevant qualifying factors. The key outcome of this review is that the qualitative FRGM can be used as a funnel technique to assess lower SIL ratings whilst more complex methods are applied on higher SILs with caution.

Suggested Citation

  • Gabriel, Angelito & Ozansoy, Cagil & Shi, Juan, 2018. "Developments in SIL determination and calculation," Reliability Engineering and System Safety, Elsevier, vol. 177(C), pages 148-161.
    • Handle: RePEc:eee:reensy:v:177:y:2018:i:c:p:148-161
    DOI: 10.1016/j.ress.2018.04.028
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    References listed on IDEAS

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    3. Redutskiy, Yury & Camitz-Leidland, Cecilie M. & Vysochyna, Anastasiia & Anderson, Kristanna T. & Balycheva, Marina, 2021. "Safety systems for the oil and gas industrial facilities: Design, maintenance policy choice, and crew scheduling," Reliability Engineering and System Safety, Elsevier, vol. 210(C).
    4. Zh. A. Dayev & Ye. T. Nurushev, 2022. "Reduction of production risks by improving the method of failure mode and effect analysis," International Journal of System Assurance Engineering and Management, Springer;The Society for Reliability, Engineering Quality and Operations Management (SREQOM),India, and Division of Operation and Maintenance, Lulea University of Technology, Sweden, vol. 13(1), pages 278-288, February.
    5. Marcin Śliwiński & Emilian Piesik, 2021. "Designing Control and Protection Systems with Regard to Integrated Functional Safety and Cybersecurity Aspects," Energies, MDPI, vol. 14(8), pages 1-22, April.
    6. Kazimierz T. Kosmowski & Emilian Piesik & Jan Piesik & Marcin Śliwiński, 2022. "Integrated Functional Safety and Cybersecurity Evaluation in a Framework for Business Continuity Management," Energies, MDPI, vol. 15(10), pages 1-21, May.

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