Tukey-EWMA control chart with variable sampling intervals for process monitoring

In this study, the Tukey-Exponential Weighted Moving Average control chart with variable sampling interval (VSI Tukey-EWMA) is proposed. The performance of the proposed control chart is investigated for several distributions and compared with Tukey-EWMA and VSI EWMA control charts. We show that the...

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Bibliographic Details
Published in:Quality engineering 2024-04, Vol.36 (2), p.249-272
Main Authors: Adsız, Selcem, Aytaçoğlu, Burcu
Format: Article
Language:English
Subjects:
average extra quadratic loss
Control charts
Markov Chain
Markov chains
non-normality
Sampling
Tukey-EWMA
VSI
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Summary:In this study, the Tukey-Exponential Weighted Moving Average control chart with variable sampling interval (VSI Tukey-EWMA) is proposed. The performance of the proposed control chart is investigated for several distributions and compared with Tukey-EWMA and VSI EWMA control charts. We show that the VSI Tukey-EWMA control chart outperforms the Tukey-EWMA control chart and it performs similarly to the VSI EWMA control chart. The average extra quadratic loss is calculated to examine the overall performance over the whole process shift range by using the Markov chain approach. Finally, the VSI Tukey-EWMA and Tukey-EWMA control charts are applied on real data.
ISSN:0898-2112
1532-4222
DOI:10.1080/08982112.2023.2199824