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Evaluating and Improving the Synthetic Control Chart

Summary: [This abstract is based on the authors' abstract.] A synthetic control chart designed to detect shifts in the process mean can be represented as a runs rule chart with a head start feature. A Markov chain model of the synthetic control chart is proposed for the evaluation of the zero-state and steady-state average run length performance. Performance is not as reliable as cumulative sum and exponentially weighted moving average charts.

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  • Topics: Statistical Process Control (SPC)
  • Keywords: Average run length (ARL),Cumulative sum control chart (CUSUM),Statistical process control (SPC),Run charts,Markov chains,Exponentially weighted moving average control charts (EWMA)
  • Author: Davis, Robert B.; Woodall, William H.
  • Journal: Journal of Quality Technology