Optimization of Electroless Ni-P-W Coatings for Minimum Friction and Wear Using Grey-Taguchi Method

Table 2

Design factors and their levels.

Design factors	Unit	Levels
		1	2	3
Load (𝐴)	N	50	75^a	100
Speed (𝐵)	R.P.M	60	70^a	80
Time (𝐶)	min	5	10^a	15

aInitial condition.