Crane Operation Hazard Evaluation Based on Z-Number and CPT

Crane operation hazard evaluation plays an important role in theo prevention of accidents and casualties. Therefore, formulating effective measures to ensure the safety of cranes is vital. However, most studies on crane safety evaluation overlook the risk attitudes of decision makers. To overcome the limitations of the current research, this study proposes a novel risk prioritization method based on the Z-number and cumulative prospect theory (CPT) for crane operation hazard evaluation. First, considering the uncertainty and unreliability of decision makers’ assessments, the Z-number is utilized to capture the decision information with regard to crane operation hazards. Second, to consider decision makers’ psychological behavior in crane operation hazard evaluation, CPT is used in the Z-environment to rank the identified hazards. Third, grade discrimination rules and cumulative prospect values are integrated to classify the danger level of a hazard. Finally, a case study involving a crane operation hazard evaluation based on the Z-number and CPT is employed to verify the practicability of the proposed model. Sensitivity analyses and comparative studies are conducted to validate the proposed method.