Design of Experiments - US Army Conference on Applied Statistics

Regular <strong>Design</strong>s may not Always be the Best Choice
for Screening
• In regular designs the alias matrix consists <strong>of</strong> either 0, +1 or -1
entries
• That means that effects are completely confounded
• Unless the experimenter has some “process knowledge”, effects
cannot be separated without conducting additional experiments
– Fold-over
– Partial fold-over
– Optimal augmentation
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