Table 2. Level Value of Each Classification.

Judgment of Occurrence Probabilities Classification	Level Value
Nonoccurrence	0
Absolute low	0.1
Very low	0.2
Low	0.3
Fairly low	0.4
Medium	0.5
Fairly high	0.6
High	0.7
Very high	0.8
Absolute high	0.9
Occurrence	1