Results 1 to 10 of about 4,359,077 (237)
Results in Engineering, 2023 Control charts are an extremely valuable tool in statistical process control (SPC) for processing information from a system or procedure over time and displaying statistically significant changes in data while also showing how a system or process is ...
Khanittha Talordphop +2 more
doaj +5 more sources
Connection Science, 2022 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 - moving average control chart (MMEM), a new mixed control chart for observing ...
Khanittha Talordphop +2 more
doaj +5 more sources
Nonparametric mixed exponentially weighted moving average-moving average control chart
Scientific ReportsThis research designed a distribution-free mixed exponentially weighted moving average-moving average (EWMA-MA) control chart based on signed-rank statistic to effectively identify changes in the process location.
Muhammad Ali Raza +5 more
doaj +4 more sources
Exponentially weighted moving average-Moving average charts for monitoring the process mean.
PLoS ONE, 2020 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 in a process underlying symmetric and asymmetric distributions.
Saowanit Sukparungsee +2 more
doaj +3 more sources
An Adaptive Exponentially Weighted Moving Average Control Chart [PDF]
Technometrics, 2003 Lucas and Saccucci showed that exponentially weighted moving average (EWMA) control charts can be designed to quickly detect either small or large shifts in the mean of a sequence of independent observations. But a single EWMA chart cannot perform well for small and large shifts simultaneously.
Giovanna Capizzi, Guido Masarotto
exaly +2 more sources
The weighting factor of exponentially weighted moving average chart
Turkish Journal of Biochemistry, 2020 Hikmet Can Cubukcu
exaly +2 more sources
PLoS ONE, 2022 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.
Khanittha Talordphop +2 more
doaj +2 more sources
MONITORING TRACTOR PERFORMANCE USING SHEWHART AND EXPONENTIALLY WEIGHTED MOVING AVERAGE CHARTS [PDF]
Engenharia Agrícola, 2021 Statistical process control has been widely used in agricultural operations for monitoring and improving process quality. This study aims to evaluate the Shewhart and exponentially weighted moving average (EWMA) control charts to monitor the performance ...
Murilo A. Voltarelli +4 more
doaj +1 more source
Application of mathematical models in stock market analysis
Lietuvos Matematikos Rinkinys, 2021 This paper describes several methods for modulating of the stocks volatility through use of variance, EWMA and GARCH models. Results are presented using logarithmic return of the Lithuanian OMXV index.
Svetlana Danilenko
doaj +1 more source
Optimal Surveillance Based on Exponentially Weighted Moving Averages [PDF]
Sequential Analysis, 2006 Abstract Statistical surveillance is used to detect an important change in a process as soon as possible after it has occurred. The exponentially weighted moving averages (EWMA) method is used in industry, economics, and medicine. Three optimality criteria of surveillance are studied.
Frisén, Marianne, Sonesson, Christian
openaire +2 more sources