A Level | A Voltage | B Current | C Welding Speed | Total Average of S/N Ratio | |||
| Sum of S/N ratio | Average of S/N ratio | Sum of S/N ratio | Average of S/N ratio | Sum of S/N ratio | Average of S/N ratio | 22.3259 |
1 | 66.3752 | 22.1251 | 71.5680 | 23.8560* | 62.8534 | 20.9511 | |
2 | 67.8510 | 22.6170٭ | 65.5968 | 21.8656 | 66.1080 | 22.0360 | |
3 | 66.7072 | 22.2357 | 63.7686 | 21.2562 | 71.9720 | 23.9907٭ |