Design of a Multiobjective Reverse Logistics Network Considering the Cost and Service Level

Table 4

Comparison of the three algorithms in terms of the computational time.

CPU times (s)
	NSGA-II	MOSA	GA_WS
Problem set 1
Instance 1	51.34	65.05	43.28
Instance 2	59.79	68.87	44.78
Instance 3	27.66	32.80	25.78
Problem set 2
Instance 4	161.37	214.64	114.91
Instance 5	63.92	83.50	62.11
Instance 6	57.93	59.37	51.25
Problem set 3
Instance 7	189.52	238.05	136.74
Instance 8	89.89	92.35	81.01
Instance 9	104.11	107.26	86.83
Problem set 4
Instance 10	134.88	144.69	121.89
Instance 11	138.22	139.36	124.94
Instance 12	154.35	168.12	135.13
Problem set 5
Instance 13	220.63	207.66	200.92
Instance 14	227.20	213.55	202.63
Instance 15	244.02	233.79	212.03