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Evaluating and Implementing 3-Level Control Charts

Summary: [This abstract is based on the authors' abstract.]Some quality measures may use three or more discrete levels to classify a product characteristic. An earlier study referred to this classification scheme as a multi-level product quality measure and used it to evaluate and implement 3-level acceptance sampling plans. This study uses the scheme and methodology to evaluate and implement 3-level control charts. The OC and ARL functions are formulated and integrated into an approximate parameter selection method, so that it is necessary to overstate ARL manufacturing expectations in order to obtain reasonable control chart performance.

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  • Topics: Sampling
  • Keywords: Manufacturing,Multinomial,Acceptable quality level (AQL),Acceptance sampling,Distribution
  • Author: Cassady, C. Richard; Nachlas, Joel A.
  • Journal: Quality Engineering