Resolution of Fractional Factorial Experiments

The resolution of an experiment shows the maimer in which the confounding in a given experiment occurs. The resolution is denoted using a subscripted Roman numeral, for example, 2fy is a quarter fraction of a 2 -factorial experiment with a resolution of IV. There are three common resolutions  

Resolution 111 In these experiments, no main effects are confounded with each other. However, some main effects may be confounded with secrmd-order interactions. Finally, some second-order interactions may be confounded with each other. 

Determining the resolution requires looking at the complete confotmding pattern for the given fractional factorial experiment and determining the term with the smallest number of variables multiplied together. 

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