Table 23 Statistical results for welded beam problem case 1 and case 2 using CI–SAPF, CI–SAPF–CBO and CBO

From: Cohort intelligence with self-adaptive penalty function approach hybridized with colliding bodies optimization algorithm for discrete and mixed variable constrained problems

Results Case1 Case2
CI–SAPF CI–SAPF–CBO CI–SAPF CI–SAPF –CBO CBO
Best 1.55 1.55 1.65 1.65 4.98
Mean 1.56 1.55 1.88 1.93 7.36
Worst 1.57 1.56 2.08 2.15 10.49
Std. Dev 0.01 0.003 0.2013 0.2138 2.14
Avg. CPU time \((\rm sec)\) 1.57 2.24 2.08 2.15 0.27
Avg. function evaluations 11,786 8721 8740 6996 684