Retrofitting Transportation Network Using a Fuzzy Random Multiobjective Bilevel Model to Hedge against Seismic Risk

Table 8

Metrics of performance and set convergence for Pareto optimal sets.

Iteration	The average distance	The distribution	The extent	The set convergence
1	0.0812	0.5623	5.0088	—
2	0.0630	0.4615	5.7706	Iteration 1–2: 0.5610
3	0.1364	0.8600	6.8594	Iteration 2–3: 0.6765
4	0.1223	0.5250	6.3147	Iteration 3–4: 0.7632
5	0.1502	0.6820	6.7538	Iteration 4–5: 0.8750
6	0.2835	0.9600	6.6417	Iteration 5–6: 0.8571
7	0.0973	0.5289	5.4451	Iteration 6–7: 0.5712
8	0.1300	0.8635	6.6424	Iteration 7–8: 0.9143