ÇAĞRILI KONUŞMALAR / KEYNOTES Invited Speeches ... - TPJD

Applications of Fuzzy Set Theory for Risk Analysis in Maritime Industry:
A Literature Survey
Ayhan Menteş, İsmail H. Helvacıoğlu
Istanbul Technical University, Faculty of Naval Architecture and Ocean Engineering, Shipbuilding
and Ocean Engineering, Istanbul
Over the past decades the complexity of ship and offshore operations has increased rapidly.
Therefore, efficient and sophisticated quantitative and qualitative safety analysis techniques
have been widely developed and implemented for determination and analysis the risk limits
of marine and offshore industries related problems. Most risk analysis models are based on
quantitative solution techniques which require crisp data. However, in many cases, the available
information related to risk factors is not numerical. Rather this information can be expressed as
words or phrases in a natural language. In addition, imprecision and vagueness on failure rates
may lead to uncertainty in results, thus causing underestimated or overestimated prediction risk
levels. By allowing approximate analysis, fuzzy set theory is an effective tool for characterizing
system safety for marine and offshore industries’ applications. The aim of this paper is to provide
an in-depth presentation of the contributions of fuzzy set theory in the field of marine and
offshore industries, focusing risk analysis for real-world applications. For this purpose, we review
extensively the literature and consolidate the main results on the application of fuzzy set theory to
marine and offshore industries safety problems. Throughout the course of this study, it has been
observed that fuzzy set theory has been intensively applied to marine and offshore industries
safety problems, and has been rapidly grown in the applications. Finally, recommendations on
further studies in marine and offshore safety analysis are suggested.
Keywords: Fuzzy Set Theory, Risk Analysis, Safety Assessment, Maritime Industry
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