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Improvement of an Industrial Thermostat Using Designed Experiments

Summary: An increasing number of quality control managers are using designed experiments to assist in process improvement. This paper presents a step-by-step description of the design and execution of an experiment conduced by employees of the Athens, Alabama plant of Eaton Controls Division to improve the performance of an industrial thermostat. The paper includes a detailed account of how experimental factors were determined and the logic and results of the designers' approach to defining "good" factor levels. In addition, the paper presents the results of the actual experiment, problems encountered in data analysis, and analytical techniques for handling the censored data that arose during the experiment.

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  • Topics: Reliability, Data Quality
  • Keywords: Taguchi method,Reliability,Plackett and Burman designs,Case study,Censored data
  • Author: Bullington, Robert; Lovin, Scott; Miller, David; Woodall, William
  • Journal: Journal of Quality Technology