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Adding Repetitions

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The power of a DOE can easily increased by adding repetitions. This can be done on 2 ways.

1. Use an extra column for repetitions

Fill in the measurement data in the input table. In this case there is one replicate. As you can see in the example the amount test for each level is 8 instead of 4. But now you can not use the other columns for different results on the same samples.

Data file

2. Replicate the whole test array

Below a L9 array is replicated 3 times.
TestOrthogonal Array L9, 3 repetitions
Factor 1Factor 2Factor 3Factor 4Repetition
1-1-1-1-1First
2-1000
3-1111
40-101
5001-1
601-10
71-110
810-11
9110-1
10-1-1-1-1Second
11-1000
12-1111
130-101
14001-1
1501-10
161-110
1710-11
18110-1
19-1-1-1-1Third
20-1000
21-1111
220-101
23001-1
2401-10
251-110
2610-11
27110-1
Now it is possible to add 10 different properties of the sample in the columns for analysis.
Here you can see how to select the L9 Orthogonal array with 3 repetitions. The amount of repetitions can be set for all the type of arrays.


As you can see in the image below 2 properties or the samples are filled in and the Temp is selected with Use result Column Selection B.

Data file