# DOE: Screening Using Fractional Factorials

Chapter

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## Abstract

The methods presented in this chapter are primarily relevant when it is desired to determine simultaneously which of many possible changes in system inputs cause average outputs to change. “**Factor** **screening** ” is the process of starting with a long list of possibly influential factors and ending with a usually smaller list of factors believed to affect the average response. More specifically, the methods described in this section permit the simultaneous screening of several (*m*) factors using a number of runs, *n*, comparable to but greater than the number of factors (*n* ~ *m* and *n* > *m*).

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