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Stat-Ease Blog

  • A central composite design (CCD) is a type of response surface design that will give you very good predictions in the middle of the design space.  Many people ask how many center points (CPs) they need to put into a CCD. The number of CPs chosen (typically 5 or 6) influences how the design functions.

    Two things need to be considered when choosing the number of CPs in a central composite design:
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