Fig 7. First (best), fifth (near median) and last summary attainment surfaces for the 10 × 10 problem using normal DE, DE_bias, ${\text{DE}}_{bias}^{\text{r}/\text{d}/1}$ and ${\text{DE}}_{bias}^{\text{r}/\text{d}/3*}$.

Best, second best and worst of the three ACO result sets are plotted independently, in that order.