Contributors to a multivariate statistical process control chart signal

Research output: Contribution to journalArticlepeer-review

104 Scopus citations


A significant practical disadvantage of multivariate statistical process control is that it is difficult to determine which of the monitored variables is responsible for the out-of-control signal. While there have been several proposed techniques and diagnostics, most of these have disadvantages. Rather than an ad hoc selection, we use three approaches to develop a diagnostic for a chi-square chart and generate the same statistic from each approach. Consequently, intuitive interpretations of the diagnostic are provided and previous proposals are simplified by a focus on a single metric.

Original languageEnglish (US)
Pages (from-to)2203-2213
Number of pages11
JournalCommunications in Statistics - Theory and Methods
Issue number10
StatePublished - 1996


  • Assignable cause
  • Chi-square chart
  • T chart
  • X chart

ASJC Scopus subject areas

  • Statistics and Probability


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