**4.5 Response table for bead width**

The response table is obtained for the S/N ratio and mean for bead width as shown in **Tables 16** and **17**. The response table is obtained by Minitab 18 statistical software which represents the significance of each individual input parameter. Delta value is obtained for peak current, base current, pulse frequency and pulse on time which is the difference between the highest value to the lowest value. The rank of the input parameter is decided as per the highest value of delta [8].
