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How to specify a DOE constraint with a categorical and continuous factor?

In a DOE HPLC optimization study I have a two level categorical factor column (A & and a continuous factor flowrate. For column A the flowrate range is 0,5 - 2 ml/min but for flowrate B the range is more narrow i.e. 0,5 - 1 ml/min. How can I make a constraint so that there are no combinations column B with flowrate > 1 ml/min?

DOE

Re: How to specify a DOE constraint with a categorical and continuous factor?

Hi Frank, Disallowed Combinations in Custom Design should enable you to do this. You can specify the combination of Column B AND Flowrate > 1 as a combination that should be diasllowed.

Disallowed Combos.png

Re: How to specify a DOE constraint with a categorical and continuous factor?

Thanks Phil! Frank

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