Create Factorial Design
Two-Level Fractional Factorial Designs - Design Generators
|
|
Create Factorial DesignTwo-Level Fractional Factorial Designs - Design Generators |
|
The design generators determine how the fraction or subset of runs are selected from the full set of runs.
Example Output |
|
|
Design Generators: D = ABC
Alias Structure
I + ABCD
A + BCD B + ACD C + ABD D + ABC AB + CD AC + BD AD + BC |
Interpretation |
|
For the insulation experiment, the (2**4-1) design was constructed using the generator D = ABC is shown below.
|
A |
B |
C |
D = ABC |
|
|
|
|
|
|
+ |
|
|
+ |
|
|
+ |
|
+ |
|
+ |
+ |
|
|
|
|
|
+ |
+ |
|
+ |
|
+ |
|
|
|
+ |
+ |
|
|
+ |
+ |
+ |
+ |
The - and + signs in the table represent the low and high factor settings, respectively. To determine the settings for Factor D, you simply multiply the signs for Factors A, B, and C. For example, in the first run of the design, A x B x C = (-)(-)(-) = -. Therefore, for the first run of your experiment you would set Factor D at its low setting.
Free online chart generators for statistical analysis:
Useful tools:
