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Guidance on mixtures design approach for a 6 component mixture with only 3 variables.

Hello all,

 

I'm looking to set up a mixtures design for a mixture which overall contains 6 components at these percentages below, but I only want to use three of these as my input variables. Components 4 to 6 must add up to 15 %.

 

Component 1: 70 %

Component 2: 10 %

Component 3: 5 %

Component 4: 0 - 5%

Component 5: 0 - 5 %

Component 6: 0 - 5 %

 

When setting up the DoE, how do I remove Components 1, 2 and 3 from the overall study? Can I just ignore the first three components and setup up the mixtures design with the 4 - 6 components. In this case, do I set it up so they still add up to 15 %, or do I scale it up to 100 %?

 

I'm hoping you all can provide some clarification and guidance. Thank you.

Design of Experiments