Tukey-EWMA control chart with variable sampling intervals for process monitoring
Articles > Article · 2023
Authors: Selcem Adsız, Burcu AYTAÇOĞLU
Quality Engineering, Journal Indexed in SCI Expanded, International, WoS, 2023, vol 36, pp 249-272
DOI: 10.1080/08982112.2023.2199824
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.