Table 8. Statistical results of the used algorithms for tension-compression spring design problem (Case 1).
| Algorithm | Best | Mean | Worst | SD |
|---|---|---|---|---|
| TSO | 0.012673 | 0.013698 | 0.017631 | 0.001075 |
| CTSO1 | 0.012715 | 0.013655 | 0.017233 | 0.00081 |
| CTSO2 | 0.012702 | 0.013486 | 0.016016 | 0.000722 |
| CTSO3 | 0.01268 | 0.014229 | 0.020937 | 0.001895 |
| CTSO4 | 0.012784 | 0.013732 | 0.016824 | 0.000896 |
| CTSO5 | 0.012714 | 0.013537 | 0.015575 | 0.000668 |
| CTSO6 | 0.012739 | 0.013413 | 0.015612 | 0.000617 |
| CTSO7 | 0.01268 | 0.013579 | 0.015701 | 0.000774 |
| CTSO8 | 0.012683 | 0.013597 | 0.017302 | 0.000961 |
| CTSO9 | 0.012670 | 0.013483 | 0.017367 | 0.001136 |
| CTSO10 | 0.012714 | 0.013481 | 0.015773 | 0.000701 |