Exclusive Content & Downloads from ASQ

Systematic Patterns in T(2) Charts

Summary: [This abstract is based on the authors' abstract.] Proper diagnosis of nonrandom or systematic patterns occurring in a univariate Shewhart control chart can lead to process improvement by reducing the overall system variation. Process conditions are examined that lead to the occurrence of certain nonrandom patterns in a T(2) control chart. Results are applicable to either a Phase I or Phase II operation where the T(2) statistic is based on the most common covariance matrix estimator.

Anyone with a subscription, including Site and Enterprise members, can access this article.

Other Ways to Access content:

Join ASQ

Join ASQ as a Full member. Enjoy all the ASQ member benefits including access to many online articles.

Subscribe to Journal of Quality Technology

Access this and ALL OTHER Journal of Quality Technology online articles. You'll also receive the print version by mail.

  • Topics: Process Management, Statistical Process Control (SPC)
  • Keywords: Autocorrelation,Multivariate control chart,Process variability,Trend analysis,Statistical Process Control (SPC),T2 control charts,Shewhart control charts
  • Author: Mason, Robert L.; Chou, Youn-Min; Sullivan, Joe H.; Stoumbos, Zachary G.; Young, John C.
  • Journal: Journal of Quality Technology