Table 3.

Corresponding values between risk assessment results of catastrophe model and ordinary-use values at different risk levels.

Risk level	Relative degree of membership obtained by catastrophe model	Corresponding ordinary-use values
Very safe	>0.9884	>0.8
Safe	0.9884–0.9738	0.8–0.6
Generally recognized as safe (GRAS)	0.9738–0.9539	0.6–0.4
Unsafe	0.9539–0.9213	0.4–0.2
Very unsafe	<0.9213	<0.2