Efficiency enhancement of the modified EWMA control method with conditional expected delay for change detection in processes
This study investigates the efficiency of a modified exponentially weighted moving average
(EWMA) control method using conditional expected delay to improve its efficiency in …
(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 …
methods such as the exponentially weighted moving average (EWMA) chart and the …
Exponentially weighted moving average—Moving average charts for monitoring the process mean
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 …
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 …
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
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 …
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 …
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 …
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 …
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
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 …
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
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 …
moving average (EWMA), are widely used for tracking minor to moderate changes in …