In the Design
of Experiments a Balanced Design
(Balanced Experiment) is a factorial
design in which each factor
is run the same number of times at the high
and low levels.
This two factor design shown below is balanced
because both factors ('A' and 'B') are run
an equal number of times (twice) at both
levels:
Treatment |
A |
B |
AB +
C |
1 |
-1 |
-1 |
+1 |
2 |
+1 |
-1 |
-1 |
3 |
-1 |
+1 |
-1 |
4 |
+1 |
+1 |
+1 |
Most factorial designs are balanced, unbalanced
designs are only used in exceptional circumstances. |