On the basis of the human' cognitive model, the hierarchy framework of causal factors of human errors is built in this paper. Regarding the data of human factor events in certain plant as the example, Grey Relational Analysis (GRA) method in grey system theory is introduced to quantitatively calculate and analyze the relativities of various factors causing human errors in the hierarchy framework, such as between human error and main factors, between human error and various sub-factors and among various sub-factors under the same main factor. The analysis results shows that the key factor of hu...
