Monitoring air quality index with EWMA and individual charts using XGBoost and SVR residuals [PDF]
MethodsXPM2.5 air pollution poses significant health risks, particularly in urban areas such as Jakarta, where concentrations frequently surpass acceptable levels due to rapid urbanization.
Zulfani Alfasanah +4 more
doaj +2 more sources
Max-mixed EWMA control chart for joint monitoring of mean and variance: an application to yogurt packing process [PDF]
Scientific ReportsThe Max-Mixed EWMA Exponentially Weighted Moving Average (MM EWMA) control chart is a statistical process control technique used for joint monitoring of the mean and variance of a process.
Seher Malik +6 more
doaj +2 more sources
Adaptive VSS-EWMA control chart for monitoring the process dispersion [PDF]
Scientific ReportsEffectively monitoring process dispersion is critical in ensuring high-quality production in various industrial sectors. This study presents an innovative approach by developing a Dynamic Exponentially Weighted Moving Average (EWMA) control chart with a ...
Abdullah Ali H. Ahmadini +4 more
doaj +2 more sources
A nonparametric mixed exponentially weighted moving average-moving average control chart with an application to gas turbines. [PDF]
PLoS ONEThis study aims to develop a nonparametric mixed exponentially weighted moving average-moving average (NPEWMA-MA) sign control chart for monitoring shifts in process location, particularly when the distribution of a critical quality characteristic is ...
Muhammad Ali Raza +5 more
doaj +2 more sources
New extended exponentially weighted moving average control chart for monitoring process mean [PDF]
HeliyonIn this article, we develop a new control chart based on the Exponentially Weighted Moving Average (EWMA) statistic, termed the New Extended Exponentially Weighted Moving Average (NEEWMA) statistic, designed to recognize slight changes in the process ...
Hina Javed, Muhammad Ismail, Nadia Saeed
doaj +2 more sources
Application of Residual-Based EWMA Control Charts for Detecting Faults in Variable-Air-Volume Air Handling Unit System [PDF]
Journal of Control Science and Engineering, 2016 An online robust fault detection method is presented in this paper for VAV air handling unit and its implementation. Residual-based EWMA control chart is used to monitor the control processes of air handling unit and detect faults of air handling unit ...
Haitao Wang
doaj +2 more sources
An adaptive Bayesian approach for improved sensitivity in joint monitoring of mean and variance using Max-EWMA control chart [PDF]
Scientific ReportsThis article introduces an adaptive approach within the Bayesian Max-EWMA control chart framework. Various Bayesian loss functions were used to jointly monitor process deviations from the mean and variance of normally distributed processes.
Abdullah A. Zaagan +4 more
doaj +2 more sources
An adaptive multivariate functional EWMA control chart
Journal of Quality TechnologyIn many modern industrial scenarios, the measurements of the quality characteristics of interest are often required to be represented as functional data or profiles. This motivates the growing interest in extending traditional univariate statistical process monitoring (SPM) schemes to the functional data setting. This article proposes a new SPM scheme,
Christian Capezza +4 more
openalex +5 more sources
Variable sample size based EWMA control chart with an exponential scaling mechanism for production process monitoring. [PDF]
Sci RepNafisah IA +3 more
europepmc +3 more sources
A synthetic exponentially weighted moving average control chart to monitor process median based on ranked set sampling [PDF]
ITM Web of Conferences, 2021 Exponentially Weighted Moving Average (EWMA) control charts yield insights into data in a way more comprehensible to the practitioners and researchers because of its capability in discovering small to moderate process mean shifts.
Ng Jing Wen +2 more
doaj +1 more source