Parameter

Process Parameter

Degree of Freedom

Sum of Squares

Variance

F-ratio

Contribution (%)

A

Voltage, V

2

0.1332

0.0666

0.00096

0.09

B

Current, A

2

3.6973

1.8487

0.0268

2.53

C

Welding Speed, mm/s

2

4.7457

2.3729

0.0344

3.24

Error

2

137.8180

68.9090

-

94.14

Total

8

146.3942

-

-

100