Estimating the Influence of Improper Workplace Environment on Human Error: Posterior Predictive Analysis

Table 1

Influence (probability increase) of root nodes on unsafe behavior.

PSF	Insufficient maintenance (K1)	Inadequate quality control (K2)	Improper management (K3)	Improper design (K4)
P(X1|PSF = no)	6.08%	3.34%	6.10%	6.07%
P(X1|PSF = yes)	7.08%	16.14%	6.10%	10.91%
PI	16.4%	383.1%	0.00%	79.6%

PI (probability increase) = [P(X1|PSF = yes) − P(X1|PSF = no)]/P(X1|PSF = no).