A Novel Ant Colony Optimization Algorithm for Large Scale QoS-Based Service Selection Problem

Table 2

The obtained fitness values for the compared algorithms (best/worst/average).

Instances	DiGA	SPSO	MPDACO	CASS
T1(150)	0.1455/0.1614/0.1555	0.1468/0.1573/0.1536	0.1455/0.1501/0.1481	0.1455/0.1529/0.1481
T2(200)	0.1595/0.1798/0.1677	0.1546/0.1561/0.1549	0.1521/0.1562/0.1539	0.1521/0.1559/0.1533
T3(250)	0.1474/0.1637/0.1562	0.1469/0.1519/0.1476	0.1426/0.1503/0.1464	0.1415/0.1470/0.1447
Tc4(2500)	0.1705/0.1884/0.1808	0.1694/0.1829/0.1796	0.1724/0.1865/0.1780	0.1676/0.1819/0.1742
Ta5(2500)	0.1753/0.1899/0.1818	0.1621/0.1845/0.1732	0.1683/0.1862/0.1795	0.1597/0.1763/0.1698
Ti6(2500)	0.1768/0.1890/0.1834	0.1689/0.1775/0.1746	0.1792/0.1860/0.1829	0.1627/0.1740/0.1685