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

Table 4

A scale reference table of the .

Difficulty description of the DD	Quantitative interpretation of the DD	Quantitative scale score
Very high	Absolutely not detected	10
-	Impossible to be tested	9
High	Difficultly detect	8
-	The rate of detection is very low	7
Moderate	The rate of detection is low	6
-	Moderate detection rate	5
-	The detection rate is higher	4
Low	The rate of detection is high	3
-	The rate of detection is very high	2
Very low	Very easy to be detected	1