Railway Safety Risk Assessment and Control Optimization Method Based on FTA-FPN: A Case Study of Chinese High-Speed Railway Station

Table 7

Control results under different cost constraints.

Scheme	Controlled risk source	Cost constraint	Risk level of P1
1	P1, P2, P3, P4	700,000 Yuan/year	0.5090
2	P1, P2, P3, P4, P8	900,000 Yuan/year	0.4143
3	P13, P10, P1, P2, P3, P4, P5, P8	1150,000 Yuan/year	0.3801