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Two Modified Semicircle Control Charts for Detecting Process Improvement

Summary: [This abstract is based on the author's abstract.]Two modified semicircle charts are proposed for detecting a reduction in process variation that leads to process improvement. Each chart has two limits defined by the inner and outer semicircles. It is shown by simulation that the average run length performance of these charts is superior to that of the basic semicircle chart in the detection of process improvement.

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  • Topics: Process Management
  • Keywords: Average run length (ARL),Control charts,Design of control charts,Process improvement,Process variability
  • Author: Khoo, Michael B.C.
  • Journal: Quality Engineering