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

Zhenlu Chen, Rong Pan, Lirong Cui

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1-20
Number of pages20
JournalQuality Engineering
StateAccepted/In press - May 10 2017


  • confidence level
  • inspection time
  • manufacturing variation
  • off-line inspection
  • quality control

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Industrial and Manufacturing Engineering


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