Real-Time Vehicle Routing for Repairing Damaged Infrastructures Due to Natural Disasters

Table 4

The results for the test networks with a single open depot.

Problem no.	Nodes	Algorithm	Initial solution	Improved solution	Improved. rate	CPU time (sec)
						Initial solution	Improved solution	Total
1	10	Chen et al.	1449	1229	17.9	0.37	0.87	1.25
		Hsueh et al.	1531	1229	24.6	0.25	0.87	1.12
2	17	Chen et al.	5998	5022	19.4	0.75	1.75	2.50
		Hsueh et al.	6291	5022	25.3	0.31	1.28	1.59
3	19	Chen et al.	7153	5608	27.6	0.84	1.84	2.68
		Hsueh et al.	7721	5972	29.3	0.47	2.03	2.50
4	20	Chen et al.	8211	6445	27.4	0.94	2.18	3.12
		Hsueh et al.	8611	6445	33.6	0.37	1.44	1.81
5	23	Chen et al.	10469	8155	28.4	1.18	2.53	3.71
		Hsueh et al.	10304	8155	26.3	0.56	1.84	2.40
6	30	Chen et al.	24035	19704	22.0	2.25	4.02	6.27
		Hsueh et al.	24099	19704	22.3	0.90	2.71	3.62
7	31	Chen et al.	22848	19492	17.2	2.68	6.02	8.70
		Hsueh et al.	21749	19555	11.2	1.09	3.28	4.37
8	34	Chen et al.	29105	26149	11.3	2.93	5.40	8.33
		Hsueh et al.	30470	26380	15.5	0.87	3.06	3.93
9	37	Chen et al.	33887	28717	18.0	4.27	6.71	10.98
		Hsueh et al.	33934	28750	18.0	0.94	4.15	5.08
10	40	Chen et al.	42466	38280	10.9	6.68	9.89	16.57
		Hsueh et al.	42839	38292	11.9	1.44	5.71	7.15
11	48	Chen et al.	48422	47785	1.3	13.82	20.87	34.69
		Hsueh et al.	58266	51758	12.6	2.43	9.33	11.76
12	50	Chen et al.	58442	57703	1.3	17.81	24.65	42.46
		Hsueh et al.	71856	64206	11.9	2.62	9.92	12.54
13	70	Chen et al.	122340	120602	1.4	64.10	76.92	141.02
		Hsueh et al.	141277	126829	11.4	5.34	17.25	22.59
Average		Chen et al.	31910	29607	15.7	9.13	12.59	21.71
		Hsueh et al.	35304	30946	19.5	1.35	4.84	6.19

Remark: CPU time is recorded for Microsoft Windows XP, INTEL Pentium 4 3.0 GHz, 1 GB RAM.