2. Independent factor screening

The first type of screening studied here consists in determining whether, for each factor under consideration, switching from one level to another causes a significant change in the response(s) measured.

This type of problem is universal and can be encountered by any experimenter. It enables the formulator, for example, to select one or two additives from several proposed, or to show that raw material conditioning has no influence... Screening matrices and the corresponding analysis tools are essentially designed...