A Nonlinear Multiobjective Bilevel Model for Minimum Cost Network Flow Problem in a Large-Scale Construction Project

Table 8

Computation time and memory used by MOBLPSO, MOBLGA and MOBLSA.

Type	Combination of weights		Minimal weight sum value of the two objectives			Average computation time (min)
			MOBLPSO	MOBLGA	MOBLSA	MOBLPSO	MOBLGA	MOBLSA
1			1152.027	1160.989	1152.531	20.856	25.899	34.458
2			1024.272	1032.419	1024.273	20.926	26.032	33.921
3			896.238	903.848	897.214	21.052	25.679	34.068
4			769.472	775.277	769.555	21.158	25.329	35.568
5			641.786	646.706	641.897	20.963	26.169	35.012
6			514.148	518.136	514.216	20.678	26.969	35.142
7			386.486	388.529	386.521	21.203	26.135	34.791
8			258.792	260.836	258.792	20.734	25.475	35.291
9			131.081	132.143	131.081	21.134	26.189	34.815