Results 21 to 30 of about 3,384 (212)
A STUDY OF THE MEDIAN RUN LENGTH (MRL) PERFORMANCE OF THE EWMA t CHART FOR THE MEAN
South African Journal of Industrial Engineering, 2012 The exponentially weighted moving average (EWMA) chart is effective in detecting small shifts. However, the EWMA chart is not robust enough to prevent errors in estimating the process standard deviation or a changing standard deviation.
Chin, W. S., Khoo, M. B. C.
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The analytical framework for optimizing TCP retransmission algorithm based on adjustment of its EWMA parameters [PDF]
International Journal of Electronics and TelecommunicationsIn this paper we derive mathematical description of TCP (Transmission Control Protocol) retransmission probability based on Jacobson’s smoothing algorithm that belongs to EWMA (Exponentially Weighted Moving Average) category.
Michał Grabowski, Robert Janowski
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Frontiers in Applied Mathematics and Statistics, 2023 This study investigates the efficiency of a modified exponentially weighted moving average (EWMA) control method using conditional expected delay to improve its efficiency in detecting changes in a process over time.
Nasrullah Khan +2 more
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A Simple Approach for Monitoring Business Service Time Variation
The Scientific World Journal, 2014 Control charts are effective tools for signal detection in both manufacturing processes and service processes. Much of the data in service industries comes from processes having nonnormal or unknown distributions.
Su-Fen Yang, Barry C. Arnold
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An Enhanced Auxiliary Information‐Based EWMA‐t Chart for Monitoring the Process Mean
Applied Sciences, 2020 The exponentially weighted moving average t chart using auxiliary information (AIB-EWMA-t chart) is an effective approach for monitoring small process mean shifts when the process standard deviation is unstable or poorly estimated. To further enhance the
Jen‐Hsiang Chen, Shin‐Li Lu
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EWMA Chart and Measurement Error [PDF]
Journal of Applied Statistics, 2004 Measurement error is a usually met distortion factor in real-world applications that influences the outcome of a process. In this paper, we examine the effect of measurement error on the ability of the EWMA control chart to detect out-of-control situations. The model used is the one involving linear covariates.
Maravelakis, Petros +2 more
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Journal of Men's Health, 2022 Background: This study’s aim was twofold: (i) to compare starters and non-starters on a professional soccer team in terms of variations in training intensity indexes across a season, calculated through total distance, sprint distance, accelerations (Acc),
Hadi Nobari +4 more
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Redes neuronales aplicadas al control estadístico de procesos con cartas de control EWMA
Tecnura, 2023 Contexto: Existe una creciente necesidad de monitorear y predecir variables críticas en procesos productivos; por tanto, a partir del enfoque de control estadístico, se ha asumido desde el uso de cartas de control para mediciones individuales.
Ruth Milena Suárez Castro +1 more
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Scientific Reports, 2023 In this article, we introduce a novel Bayesian Max-EWMA control chart under various loss functions to concurrently monitor the mean and variance of a normally distributed process.
Javed Iqbal +5 more
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Taiwanese Journal of Obstetrics & Gynecology, 2021 Objective: The establishment of ongoing audits for first-trimester nuchal translucency (NT) measurements is of paramount importance. The exponentially weighted moving average (EWMA) chart has been published as an efficient tool for NT quality control ...
Martin Hynek +4 more
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