Results 21 to 30 of about 4,359,077 (237)
Bivariate copulas on the exponentially weighted moving average control chart [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2016 This paper proposes four types of copulas on the Exponentially Weighted Moving Average (EWMA) control chart when observations are from an exponential distribution using a Monte Carlo simulation approach. The performance of the control chart is based on
Sasigarn Kuvattana +3 more
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A multivariate triple exponentially weighted moving average control chart [PDF]
, 2022 Statistical process monitoring (SPM) is mostly populated with univariate control charts used to monitor a single variable (or quality characteristic).
Chatterjee, Kashinath +2 more
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Inertia measurement of exponentially weighted moving average control chart based on autocorrelated attribute data [PDF]
مدیریت تولید و عملیات, 2022 Purpose: This paper aims to study the effect of inertia on the performance of the EWMA control chart for attribute characteristics and to investigate the effects of inertia properties on control charts with attribute characteristics.Design/methodology ...
Poune Ghasemian Asl, Rassoul Noorossana
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Exponentially weighted moving average charts for detecting concept drift [PDF]
Pattern Recognition Letters, 2012 Classifying streaming data requires the development of methods which are computationally efficient and able to cope with changes in the underlying distribution of the stream, a phenomenon known in the literature as concept drift. We propose a new method for detecting concept drift which uses an Exponentially Weighted Moving Average (EWMA) chart to ...
Gordon J. Ross +3 more
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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.
doaj +1 more source
A Comparison Between the MEWMA and Mahalanobis Distance Control Chart
Kurdistan Journal of Applied Research, 2021 Statistical Process Control (SPC) is approaching that uses statistical techniques to monitor the process. The methods of quality control are widely used in controlling any strategy—the widely used control charts.
Kawa Rashid
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Mixed Control Charts Using EWMA Statistics
IEEE Access, 2016 In this paper, two mixed control charts are designed for process monitoring when the quality characteristic of interest follows a normal distribution.
Muhammad Aslam +3 more
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Axioms, 2023 In industrial production, the exponentially weighted moving average scheme is widely used to monitor shifts in product quality, especially small-to-moderate shifts.
Dan Yu +5 more
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Evaluations of some Exponentially Weighted Moving Average methods [PDF]
Journal of Applied Statistics, 2003 The need for statistical surveillance has been noted in many different areas, and examples of applications include the detection of an increased incidence of a disease, the detection of an increased radiation level and the detection of a turning point in a leading index for a business cycle. In all cases, preventive actions are possible if the alarm is
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Score Driven Exponentially Weighted Moving Average and Value-at-Risk Forecasting [PDF]
SSRN Electronic Journal, 2014 We present a simple methodology for modeling the time variation in volatilities and other higher-order moments using a recursive updating scheme that is similar to the familiar RiskMetrics approach. The parameters are updated using the score of the forecasting distribution, which allows the parameter dynamics to adapt automatically to any non-normal ...
Lucas, André, Zhang, Xin
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