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It is important to evaluate the reliability of parachute operators before implementing the airborne mission to improve the mission completion rate and ensure the safety of personnel. This paper draws on the cognitive reliability and error analysis method (CREAM), and establishes a quantitative model of human reliability based on fuzzy CREAM for the CREAM model in which the common performance condition (CPC) describes the horizontal boundary is not obvious and the error probability interval is wide. Firstly, the CPCs of the CREAM model are modified according to the characteristics of the airborne operation, and the threshold of the performance evaluation index is clarified. Secondly, the common performance evaluation index is quantified based on the Gaussian function, and the weight of the index is assigned; Third, defuzzify the probability of error and calculate the probability of human error. The analysis of the example shows that the method considers the individual, equipment, mission, environment, organization and other factors, and has certain objectivity. It can be used for the reliability assessment of parachute operators before the mission, reducing the incidence of human error. It can also be used for reliability analysis of personnel operations in parachute system reliability assessment. Keywords—parachute; human reliability analysis; cognitive reliability and error analysis method; fuzzy theory; common performance condition

Evaluation for Parachute Operator Reliability Based on Fuzzy CREAM