Bi-objective Optimization of Process Parameters in Electric Discharge Machining of SS630 Using Grey Relation Analysis

Table 9

Response table for signal to noise ratios (larger is better).

Level
1	-5.916	-6.414	-5.198	-3.863
2	-5.779	-6.296	-4.385	-5.873
3	-5.672	-4.629	-6.782	-6.271
4	-5.076	-5.105	-6.080	-6.437
Delta	0.840	1.785	2.397	2.575
Rank	4	3	2	1