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A Smoothed Bayes Control Procedure for the Control of a Variable Quality Characteristic with Linear Shift

Summary: A smoothed Bayes control procedure has been developed for controlling the output of a production process when the quality characteristic is continuous with a linear shift in its basic level. The procedure uses Bayesian estimation with exponential smoothing for updating the necessary parameter estimates. The application of the procedure to real-life data is illustrated with an example. Applications of the traditional X-bar chart and the cumulative sum control chart to the same data are also illustrated for comparison.

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  • Topics: Statistical Process Control (SPC)
  • Keywords: Bayesian methods,Process control
  • Author: Kamat, Satish J.
  • Journal: Journal of Quality Technology