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Operating Window Experiments: A Novel Approach to Quality Improvement

Summary: [This abstract is based on the authors' abstract.]
The operating window method has been used in a number of industrial settings, but is a novel tool in quality engineering. A system's quality and reliability can be improved if a critical factor for competing failure modes can be identified, thus reducing the probability of failures by widening the operating window of this factor. A firm basis is given for some existing practice, such as the operating window signal-to-noise ratio, and an improved strategy is provided for design, analysis, and system optimization. A wave soldering experiment is used to demonstrate the new approach.

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