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Fold-over design to resolve main effects from confoundings with two-variable interactions

Fold-over design to resolve main effects from confoundings with two-variable interactions [Pg.144]

This section presents a technique, by which a complemetary fraction can be found which can resolve all main effects from confoundings with two-variable interaction effects. [Pg.144]

Assume that a 2 fractional factorial screening experiment has been run with seven variables, and where the extra variables have been defined as 4 = 12, [Pg.144]

By making all possible multiplications of these, the following rather large complete set of generators is obtained [Pg.144]

Each estimate from this design will be an alias of 16 confounded effects. If we consider only main effects and two-variable interaction effects and ignore all higher interactions, the following estimates can be obtained  [Pg.144]




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Confounded

Confounded effect

Confounding

Confounding effects

Confounding variable

Design variables

Effective interaction

Effects interaction

Interaction design

Interactive effects

Main effects

Two effect

Variable interaction

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