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Using the Customize Window to Add Center Points

Since the budget allows four more runs, four center points will be added, two to each block. This provides for the detection of a nonlinear response and an independent estimate of variance. To add center points, follow these steps:

1. Click Customize.
2. Click Add Center Points.
3. Type 2 for the number of center points for each block.
   
   

   
   
   

4. Click OK.

ADX reports that 4 new runs have been added that are center points. The design now has 20 runs.