Table 2.

Optimal solution of the instance.

	Optimal individual	Fitness value		CPU time (sec)
		Min	Ref
g=1	1-4-7-10-2-5-9-12-3-6-8-11	110	257.61	101.50
g=2	1-6-7-11-2-9-12-3-4-8-10	196	505.40	101.28
g=3	1-7-12-2-9-11-3-4-8-10	204	611.42	101.32
g=4	1-8-12-2-7-10-3-9-11	56	678.95	101.16
g=5	1-8-12-2-10-3-9-11	258	661.81	101.18
g=6	1-11-2-10-3-9-12	132	462.78	101.24