Quantitative Risk Evaluation Model of the Multilevel Complex Structure Hierarchical System in the Petrochemical Industry

Table 3

A scale reference table of the .

Frequency description of the OF	Quantitative interpretation of the OF	Quantitative scale score
Very high	≥1/2	10
-	1/3	9
High	1/8	8
-	1/20	7
Moderate	1/80	6
-	1/400	5
-	1/2000	4
Low	1/15,000	3
-	1/150,000	2
Very low	1/1,500,000	1