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An economic off-line quality control approach for unstable production processes

Summary: [This abstract is based on the authors' abstract.] An economic off-line inspection/disposition approach is proposed, which incorporates manufacturing variation. This approach includes a new inspection algorithm for inspections based on cost minimization and utilizing a specified confidence level for identifying in-control items. This approach addresses two situations not addressed in previous papers: (i) the last unit in the batch is conforming; (ii) inspection time is non-negligible. Advantages are that there is no need to record the original position of each unit, the impact of manufacturing variation is reduced and non-negligible inspection times can be easily incorporated. Comparisons of this approach to other approaches are provided.

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  • Topics: Statistics
  • Keywords: Off-line quality control, Production, Inspection, Manufacturing, Variation
  • Author: Chen, Zhenlu; Pan, Rong; Cui, Lirong;
  • Journal: Quality Engineering