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