Screening Design Examples
A Standard Design with Two Continuous Factors and One Categorical Factor
Suppose an engineer wants to investigate a process that uses an electron beam welding machine to join two parts. The engineer fits the two parts into a welding fixture that holds them snugly together. A voltage applied to a beam generator creates a stream of electrons that heats the two parts, causing them to fuse. The ideal depth of the fused region is 0.17 inches. The engineer wants to study the welding process to determine the best settings for the beam generator to produce the desired depth in the fused region.
For this study, the engineer wants to explore the following three inputs, which are the factors for the study:
Operator, who is ...

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