
372 A First Course in Quality Engineering
Analyze the data, and assume all interactions of three factors and
above are negligible� Use α = 0�05�
A B C D Response
− − − − 7
+
− −
+
7
−
+
−
+
8
+ +
− − 6
− −
+ +
9
+
−
+
− 7
−
+ +
− 11
+ + + +
7
5.6.2 Mini-Projects
Mini-Project 5.1
A printing shop that produces advertising specialties produces paper cubes
of various sizes, of which the 3�5-in� cube is the most popular� The cubes are
cut from a stack of paper on cutting presses� The two sides of the cube are
determined by the distance of stops on the press from the cutting knife and
remain fairly constant; however, the height of the cube varies depending on
the number of ...