Approaches to Addressing Service Selection Ties in Ad Hoc Mobile Cloud Computing

Table 4

QoS metrics for various available e-mail verification web services.

Web services	Response time (ms)	Throughput (b/s)	Availability (%)	Cost (rands)	Reliability (%)	Feedback (%)
XMLLogic	720	6	85	1.2	87	59
XWebservices	1100	1.74	81	1	79	49
StrikeIron Emails	710	12	98	1	96	86
CDYNE	912	11	90	2	91	65
Webservicex	910	4	87	0	83	89
ServiceObjects	1232	9	99	5	99	94
StrikeIron Address	391	10	96	7	94	70
Kickbox	428	5	86	8	60	67
Byteplant	601	8	70	4	75	100
QuickEmail	205	3.5	95	5	89	62
TowerData	504	9	75	1	77	79
Leadspend	832	8	81	3	83	76
Briteverify	911	3	80	5.1	78	26
Mailbox	604	10	89	5	87	69
Emailanswers	505	7	85	6	95	29
BulkEmailVerifier	600	5	90	4	88	96
BulkEmailChecker	195	3.5	85	0	89	55
Emailtor	220	6	87	8	75	28
Verifalia	950	5	90	3	86	38
Xverify	350	8	96	4	94	56