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

Table 3

Comparison of the performance of the three algorithms.

	Standard (1)			Standard (2)			Standard (3)
	NSGA-II	MOSA	GA_WS	NSGA-II	MOSA	GA_WS	NSGA-II	MOSA	GA_WS
Problem set 1
Instance 1	10	10	10	10	10	10	1.00	1.00	1.00
Instance 2	8.7	8.7	8.6	8.7	8.3	7.5	1.00	0.96	0.87
Instance 3	6	6	6	6	6	6	1.00	1.00	1.00
Problem set 2
Instance 4	13	13	12.6	13	12.8	10.3	1.00	0.98	0.82
Instance 5	12	11.7	10.3	12	11.7	10.3	1.00	1.00	1.00
Instance 6	25.2	23	18.5	21.6	19.2	17.1	0.86	0.83	0.93
Problem set 3
Instance 7	25.4	23.3	19.4	25.4	21.5	11.8	1.00	0.93	0.62
Instance 8	27.3	29.7	31.7	26.3	11.8	10.6	0.96	0.41	0.34
Instance 9	19.4	16	15.7	19.4	15.6	11.3	1.00	0.98	0.72
Problem set 4
Instance 10	8	7.7	6.7	6.4	6.6	6	0.81	0.87	0.89
Instance 11	16	13.9	9.5	15.2	9.1	6.5	0.95	0.66	0.69
Instance 12	31	31.2	22.6	30.7	21.3	2	0.99	0.68	0.09
Problem set 5
Instance 13	30.5	48.7	47.6	29.3	13.6	4.4	0.96	0.29	0.09
Instance 14	18.9	21.1	17.6	18.4	9.6	13.7	0.97	0.45	0.78
Instance 15	14.6	16.3	12.6	14.6	11.7	5.4	1.00	0.74	0.45