Table 3: Wilcoxon test for comparison results in Table 2.

Compared methods Solution evaluations
Method 1 Method 2 R- R+ ρ-value Best method
HFPGA VNS-123 0 55 0.005062 HFPGA
HFPGA VNS-3 0 55 0.005062 HFPGA
HFPGA GA 0 15 0.043114 HFPGA