Optimal Allocation of Tunnel Safety Provisions Based on a Quantitative Risk Assessment Model

Table 3

Iterations for solving the problem.

	Combinations	Number of remainder combinations	Annual worth (AW) (million SD)	Safety evaluation
				Societal risk	Individual risk	EV value
Iteration 1	, ,	32	24.4896	Safe	Safe	Safe
Iteration 2	, ,	16	20.0912	Safe	Safe	Safe
Iteration 3	, ,	14	16.5816	Risky	Safe	Safe
Iteration 4	, ,	7	16.9704	Safe	Safe	Safe
Iteration 5	, ,	6	15.8264	Risky	Safe	Safe
Iteration 6	, ,	5	15.7264	Risky	Safe	Safe
Iteration	, ,	3	16.2152	Safe	Safe	Safe
Iteration 8	, ,	2	14.9712	Risky	Safe	Safe
Iteration 9	, ,	1	14.9712	Risky	Safe	Safe

indicates the optimal solution.