When is R2 appropriate for comparing customer and supplier measurement systems?

Christopher J. Nachtsheim, Kevin E. Becker

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Linear regression analysis is often used to compare paired supplier and customer measurements of a given quantitative product characteristic in a shipment of products. Specifically, the coefficient of determination, R 2, is then used to determine if the supplier's and the buyer's measurement systems are in conformity, with sufficiently high values implying agreement. In this article, we show that R2 istextitnever an appropriate statistic for making this determination. Examples are provided and an appropriate methodology for comparing two measurement systems is delineated.

Original languageEnglish (US)
Pages (from-to)1025-1031
Number of pages7
JournalQuality and Reliability Engineering International
Issue number8
StatePublished - Dec 2011


  • calibration
  • coefficient of determination
  • correlation
  • linear regression
  • measurement systems


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