Research on Elevator Risk Assessment Method Based on Fault Tree, AHP and FaHA

A method of elevator risk assessment based on fault tree, AHP and FaHA is introduced in this paper, compared with the traditional elevator risk assessment method for "group analysis + expert assessment", which is not scientific and accurate, and cannot satisfy the massive elevator evaluation. The advantages of fault tree are qualitative analysis, which has the characteristics of simplicity, image and intuition, and highlights the accuracy and comprehensiveness of elevator risk assessment project. The advantage of the analytic hierarchy process (AHP) is that it is suitable for the decision-making problem with hierarchical staggered evaluation index and difficult to quantify the target value. The advantage of the fault hazard analysis method is that the method is simple and less cost. It can exert its qualitative, quantitative analysis and cost advantages to achieve efficient, objective and rapid elevator risk assessment. On this basis, for elevators of different occasions, some projects are emphasized or enhanced. This method has been effectively applied in the elevator risk assessment in Beijing since 2014.