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Integrated Decision Analysis Methodology Based on Spherical Fuzzy Sets for Risk Assessment in Construction Industry with a Real Case Application
Munevver Yakut And İhsan Kaya
The construction sector is crucial for economic growth and sustainable development. It is considered hazardous due to the high level of danger involved. This paper proposes a risk model employing DEMATEL (Decision Making Trial and Evaluation Laboratory), TOPSIS (Technique for Order Preference by Similarity to An Ideal Solution) and VIKOR (Multicriteria Optimization and Compromise Solution) methodologies using Fine Kinney that are based on spherical fuzzy sets (SFS), which has no earlier examples in the literature or practice SF risk model was applied to ongoing construction site in Istanbul. In the proposed methodology, three experienced occupational safety experts examined construction site threats not covered in earlier studies. The TOPSIS method based spherical fuzzy sets (SF-TOPSIS) is prioritized R14 (Injury or death as a result of more than one person being attached to the vertical lifeline) over R7 (Fall from height due to lack of anchorage in sloping sheet metal roof construction). Besides, the VIKOR method based spherical fuzzy sets (SF-VIKOR) is applied to compare the importance and test the reliability of the ranking obtained from SF-TOPSIS method. According to SFVIKOR method, R5 (Worker injuries/deaths due to rainwater accumulation in construction foundation excavation) ranked first and R9 (Detection of fire as a result of smoke detectors being canceled in shelter areas) ranked last. Based on this, the prioritization criteria of SF-TOPSIS and SF-VIKOR methods are found to be different.
Keywords: Construction, spherical fuzzy sets, risk assessment, DEMATEL, TOPSIS, VIKOR