Shewhart control charts for dispersion adjusted for parameter estimation
نویسندگان
چکیده
منابع مشابه
Estimation in Shewhart control charts
The influence of the estimation of parameters in Shewhart control charts is investigated. It is shown by simulation and asymptotics that (very) large sample sizes are needed to accurately determine control charts if estimators are plugged in. Correction terms are developed to get accurate control limits for common sample sizes in the in-control situation. Simulation and theory show that the new...
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* Department of Mathematical and Physical Sciences, College of Arts and Sciences, University of Nizwa, P. O. Box 33, PC 616, Birkat Al Mouz, Oman e-mail: [email protected]; [email protected] ** Department of Statistics, St. Anthony’s College, Shillong, Meghalaya, India e-mail: [email protected]
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Use of risk adjusted control charts for monitoring patients’ surgical outcomes is now popular.These charts are developed based on considering the patient’s pre-operation risks. Change point detection is a crucial problem in statistical process control (SPC).It helpsthe managers toanalyzeroot causes of out-of-control conditions more effectively. Since the control chart signals do not necessarily...
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Nonparametric control charts are presented in order to figure out the problem of detecting changes in the process median (or mean), or changes in the variability process where there is limited knowledge regarding the underlying process. When observations are reported imprecise, then it is impossible to use classical nonparametric control charts. This paper is devoted to the problem of c...
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ژورنال
عنوان ژورنال: IISE Transactions
سال: 2017
ISSN: 2472-5854,2472-5862
DOI: 10.1080/24725854.2017.1299956