Statistical Design of Experiments
Statistical Design of Experiments
How Many Runs?
How Many Runs?
4
4
Question
Question
Ideas on how to create a 1/4
Ideas on how to create a 1/4
fraction of a 2
fraction of a 2
4
4
(2
(2
4 -
4 -
-
2
2
)?
)?
Solution;
Solution;
Pick 2
Pick 2
interaction
interaction
columns such
columns such
that their
that their
“product” is
“product” is
the highest
the highest
order
order
interaction
interaction
1
1
2
2
3
3
4
4
+
+
+
+
+
+
+
+
+
-
+
-
+
+
-
+
+
-
+
+
-
-
+
+
+
-
+
+
-
+
+
-
+
-
-
-
+
-
-
+
-
-
+
-
-
-
-
+
-
+
+
+
-
+
-
+
+
-
-
-
-
+
-
+
-
-
-
+
-
-
-
+
-
-
+
+
+
+
-
-
+
-
+
-
-
-
-
+
+
-
-
-
-
-
+
+
A
A
B
B
C
C
D
D
AB
AB
CD
CD
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