More on generators Highly fractionated factorial designs

More on generators Highly fractionated factorial designs 

Suppose that we wish to screen six variables. For this, a complete factorial design 

To define the extra variables, 4, 5, and 6, any three of the four interaction columns can be used. 

It is also true that all multiplications of the independent generators will also give the column I as result and that 

We must therefore append these derived generators to the independent generators to obtain the complete set of generators 

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