Abstract
The concept of time-varying control limits with reference to EWMA charts is briefly introduced and for the asymptotic control charts proposed by Riaz and Abbasi [Interstat: 3, 2007], a proposal of time-varying control limits is made. The proposed limits are subsequently compared with those of Riaz and Abbasi [Interstat: 3, 2007] asymptotic charts and different time-varying EWMA control structures based on the sample range R, the sample standard deviation S and Downton's estimator σ∗. The probability of detection of outliers is used as comparison criterion.
| Original language | English |
|---|---|
| Pages (from-to) | 269-286 |
| Number of pages | 18 |
| Journal | Stochastics and Quality Control |
| Volume | 24 |
| Issue number | 2 |
| DOIs | |
| State | Published - 15 Oct 2009 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© Heldermann Verlag.
Keywords
- Control charts
- Downton's estimator
- EWMA control structures
- location and scale parameters
- normality
- outliers
ASJC Scopus subject areas
- Statistics and Probability
- Safety, Risk, Reliability and Quality
- Statistics, Probability and Uncertainty
- Discrete Mathematics and Combinatorics
- Applied Mathematics