Question

DOE

SIX SIGMA

Factorial Design (DOE)

An engineer is interested in the effects of cutting speed (A), tool geometry (B), and cutting angle (C) on the life (in hours) of a machine tool. Two levels of each factor are chosen, and three replicates of a 23 factorial design are run. The results show the averages of the three replicates

A	B	C	Mean
-	-	-	26.00
+	-	-	34.67
-	+	-	39.67
+	+	-	49.33
-	-	+	42.33
+	-	+	37.67
-	+	+	54.67
+	+	+	42.33

1. Estimate the factor effects. (Please show steps)
2. Which effects appear to be large?

Answer 1