The effects of violations of the multivariate normality assumption in multivariate Shewhart and MEWMA control charts. (19th September 2017)

• Record Type: Journal Article
• Authors: Nidsunkid, Sudarat; Borkowski, John J.; Budsaba, Kamon
• Is Part Of: Quality and reliability engineering international. Volume 33:Number 8(2017:Dec.)
• Page Start: 2563
• Page End: 2576
• Publication Date: 2017-09-19
• Subjects: average run length -- MEWMA control chart -- multivariate distributions -- multivariate Shewhart control chart -- standarad deviation of run length; Reliability (Engineering) -- Periodicals; Quality control -- Periodicals; High technology -- Periodicals; 620.00452
• DOI: 10.1002/qre.2218
• Languages: English
• ISSNs: 0748-8017

Abstract

Abstract: A multivariate Shewhart and a multivariate exponentially weighted moving average control charts are types of multivariate control charts for monitoring the mean vector. For those control charts, a multivariate normal distribution is an important assumption that is used to describe a behavior of a set of quality characteristics of interest. This research explores the sensitivity of average run lengths and standard deviation of run lengths for the multivariate Shewhart and the multivariate exponentially weighted moving average control charts when the normality assumption is incorrect.