Table 9 Test results on the survey variables

Var.code	Level of ‘frequency of occurrence’		Level of ‘severity of effects on the project’		Level of ‘probability of detection on the cause
	N	Cronbach’s alpha	N	Cronbach’s alpha	N	Cronbach’s alpha
P01–P10	10	.845	10	.737	10	.719
D01–D16	16	.848	16	.841	16	.824
B01–B11	11	.820	11	.802	11	.813