Efficiency enhancement of the modified EWMA control method with conditional expected delay for change detection in processes

N Khan, M Aslam, M Albassam - Frontiers in Applied Mathematics …, 2023 - frontiersin.org
This study investigates the efficiency of a modified exponentially weighted moving average
(EWMA) control method using conditional expected delay to improve its efficiency in …

A critique of a variety of “memory-based” process monitoring methods

S Knoth, NA Saleh, MA Mahmoud… - Journal of Quality …, 2023 - Taylor & Francis
Many extensions and modifications have been made to standard process monitoring
methods such as the exponentially weighted moving average (EWMA) chart and the …

Exponentially weighted moving average—Moving average charts for monitoring the process mean

S Sukparungsee, Y Areepong, R Taboran - Plos one, 2020 - journals.plos.org
This research aimed to propose a newly-mixed control chart called the Exponentially
Weighted Moving Average—Moving Average Chart (EWMA-MA) to detect the mean change …

A critique of the use of modified and moving average‐based EWMA control charts

A Haq, WH Woodall - Quality and Reliability Engineering …, 2023 - Wiley Online Library
We show that the so‐called modified exponentially weighted moving average (EWMA)
control chart is very closely related to a moving average‐based EWMA chart. These charts …

New modified exponentially weighted moving average-moving average control chart for process monitoring

K Talordphop, S Sukparungsee, Y Areepong - Connection Science, 2022 - Taylor & Francis
The mixed control chart is proposed to improve detection performance with fewer process
shifts. In this study, we proposed the modified exponentially weighted moving average …

A note on an average run length calculation for the EWMA and other charts

A Haq, WH Woodall - Quality and Reliability Engineering …, 2022 - Wiley Online Library
In the last decade numerous papers have appeared in the statistical process monitoring
literature where the in‐control and out‐of‐control average run length (ARL) profiles of the …

A double moving average control chart: Discussion

V Alevizakos, K Chatterjee… - … in Statistics-Simulation …, 2022 - Taylor & Francis
A double moving average (DMA) control chart has been proposed in the literature for
monitoring the process mean. Several studies have also been done based on this scheme …

On the performance of the adaptive EWMA chart for monitoring time between events

XL Hu, P Castagliola, JL Zhong, AA Tang… - Journal of Statistical …, 2021 - Taylor & Francis
In high-quality processes, events related to non-quality rarely occur and the times between
these events (TBE) is likely to follow a skewed distribution like the gamma distribution. In …

Performance of new nonparametric Tukey modified exponentially weighted moving average—Moving average control chart

K Talordphop, S Sukparungsee, Y Areepong - Plos one, 2022 - journals.plos.org
Control charts are an amazing and essential statistical process control (SPC) instrument that
is commonly used in monitoring systems to detect a specific defect in the procedure. The …

Reassessment of performance evaluation of EWMA control chart for exponential process

Z Rasheed, H Zhang, SM Anwar - Quality and Reliability …, 2024 - Wiley Online Library
Memory control charts or charts, such as cumulative sums and exponentially weighted
moving average (EWMA), are widely used for tracking minor to moderate changes in …