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AuthorAbbasi, Saddam Akber
AuthorNassar, Sara Hussam
AuthorAldosari, Mashael Mohammed
AuthorAdeoti, Olatunde A.
Available date2022-02-14T08:47:11Z
Publication Date2021-12-01
Publication NameQuality and Reliability Engineering International
Identifierhttp://dx.doi.org/10.1002/qre.2904
CitationAbbasi, SA, Nassar, SH, Aldosari, MM, Adeoti, OA. Efficient homogeneously weighted dispersion control charts with an application to distillation process. Qual Reliab Eng Int. 2021; 37: 3221– 3241. https://doi.org/10.1002/qre.2904
ISSN07488017
Identifier3221-3241
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85106217857&origin=inward
URIhttp://hdl.handle.net/10576/26879
AbstractMonitoring disturbances in process dispersion using control chart is mostly based on the assumption that the quality characteristic follows normal distribution, which is not the case in many real-life situations. This paper proposes a set of new dispersion charts based on the homogeneously weighted moving average (HWMA) scheme, for efficient detection of shifts in process standard deviation (σ). These charts are based on a variety of σ estimators and are investigated for normal as well as heavy tailed symmetric and skewed distributions. The shift detection ability of the charts is evaluated using different run length characteristics, such as average run length (ARL), extra quadratic loss (EQL), and relative ARL measures. The performance of the proposed HWMA control charts is also compared with the existing EWMA dispersion charts, using different design parameters. Furthermore, an illustrative example is presented to monitor the vapor pressure in a distillation process.
Languageen
PublisherWiley
Subjectaverage run length
control chart
extra quadratic loss
HWMA
process dispersion
TitleEfficient homogeneously weighted dispersion control charts with an application to distillation process
TypeArticle
Issue Number8
Volume Number37
dc.accessType Full Text


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