Results 11 to 20 of about 420,626 (277)

Monitoring air quality index with EWMA and individual charts using XGBoost and SVR residuals [PDF]

MethodsX
PM2.5 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, M. Zaim Husnun Niam, Sri Wardiani, Muhammad Ahsan, Muhammad Hisyam Lee   +4 more
doaj   +2 more sources

Adaptive VSS-EWMA control chart for monitoring the process dispersion [PDF]

Scientific Reports
Effectively 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, Imad Khan, Abdulrahman Obaid Alshammari, Hadeel AlQadi, Wojciech Sumelka   +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 Reports
The 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, Muhammad Hanif, Muhammad Noor-ul-Amin, Imad Khan, Bakhtiyar Ahmad, Abdelgalal O. I. Abaker, Jumanah Ahmed Darwish   +6 more
doaj   +2 more sources

A nonparametric mixed exponentially weighted moving average-moving average control chart with an application to gas turbines. [PDF]

PLoS ONE
This 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, Farah Tariq, Abdullah A Zaagan, Gideon Mensah Engmann, Ali M Mahnashi, Mutum Zico Meetei   +5 more
doaj   +2 more sources

New extended exponentially weighted moving average control chart for monitoring process mean [PDF]

Heliyon
In 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

An adaptive Bayesian approach for improved sensitivity in joint monitoring of mean and variance using Max-EWMA control chart [PDF]

Scientific Reports
This 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, Muhammad Noor-ul-Amin, Imad Khan, Javed Iqbal, Saddam Hussain   +4 more
doaj   +2 more sources

Rank‐Based EWMA TBEA Control Chart

Quality and Reliability Engineering International
ABSTRACTRecently, considerable attention has been paid to the development of time between events and amplitude (TBEA) control charts. Almost all existing TBEA charts are of a parametric type. Parametric TBEA charts have the disadvantage of being very sensitive to deviations from the distributional assumptions and to the estimation of the process ...
Fernanda Otilia Figueiredo, Philippe Castagliola, Jean‐Claude Malela‐Majika   +2 more
openaire   +4 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, Wong Voon Hee, Pang Sook Theng   +2 more
doaj   +1 more source

Explicit analytical solutions for the average run length of modified EWMA control chart for ARX(p,r) processes [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2021
Statistical process control (SPC) plays a necessary role in manufacturing industry processes. An essential tool for SPC used for monitoring, measuring, controlling, and improving quality in various fields is the control chart.
Korakoch Silpakob, Yupaporn Areepong, Saowanit Sukparungsee, Rapin Sunthornwat   +3 more
doaj   +1 more source

The development of egg hatching and storage machines equipped with cooling and heating systems and iot [PDF]

, 2021
The development of egg hatching and storage machines equipped with cooling and heating systems and IoT was for helping chicken breeders to address the issue of chicken production shortages. To produce large numbers of poultry production, eggs hatching is
Abdulrahman, Khairul Anuar, Baharudin, Nurhayati, Hussin, Muhammad Nur Aizat, Rahim, Mohd Bekri, Razali, Nizamuddin, Rozali, Mohd. Zulfadli, Yunus, Faizal Amin Nur   +6 more
core   +1 more source