Results 1 to 10 of about 173,902 (219)

Standard Deviation of the Run Length (SDRL) and Average Run Length (ARL) Performances of EWMA and Synthetic Charts [PDF]

International Journal of Engineering and Technology, 2015
Statistical process control (SPC) techniques are applied to monitor a process. The control chart is a valuable tool in SPC. the shewhart control chart was the first chart proposed in the literature of SPC and it is still used in process monitoring in today's manufacturing and service industries. both the exponentially weighted moving average (EWMA) and
Michael B. C. Khoo, S. Y. Teh, X. Y. Chew, W. L. Teoh   +3 more
openaire   +2 more sources

Enhanced DEWMA-type control chart for process mean monitoring utilizing auxiliary information [PDF]

Scientific Reports
Statistical Process Control (SPC) improves product quality by monitoring process performance, with control charts being the primary tool to detect and manage variability.
Saadia Masood, Khawar Ibrar, Zabihullah Movaheedi, Hafsa Jabeen   +3 more
doaj   +2 more sources

Development of a VSS-EWMA chart for coefficient of variation with application to production process [PDF]

Scientific Reports
This study introduces a novel Variable Sample Size Exponentially Weighted Moving Average (VSS-EWMA) control chart for monitoring the coefficient of variation, termed as Dynamic Adaptive CV (DACV) chart. Tailored for dynamic production settings where both
Amna Safeer, Maysaa Elmahi Abd Elwahab, Muhammad Nabi   +2 more
doaj   +2 more sources

Variable sample size based EWMA control chart with an exponential scaling mechanism for production process monitoring [PDF]

Scientific Reports
Statistical Process Control is essential for ensuring process stability and detecting variations in a production environment. This study introduces a control chart based on the Exponentially Weighted Moving Average (EWMA) that uses an adaptive sample ...
Ibrahim A. Nafisah, Mohammed M. A. Almazah, A. Y. Al-Rezami, Saddam Hussain   +3 more
doaj   +2 more sources

Process Monitoring Using Truncated Gamma Distribution

Stats, 2023
The time-between-events idea is commonly used for monitoring high-quality processes. This study aims to monitor the increase and/or decrease in the process mean rapidly using a one-sided exponentially weighted moving average (EWMA) chart for the ...
Sajid Ali, Shayaan Rajput, Ismail Shah, Hassan Houmani   +3 more
doaj   +1 more source

Absolute Deviation-Based Control Charts for Monitoring Mean of Weibull Distribution With Type-I Censoring

IEEE Access, 2021
This article presents deviation based exponentially weighted moving average control charts to monitor type-I censored data. Due to practical applications, this study considers Weibull distribution to assess the performance of the proposed memory-type ...
Sajid Ali, Nabeel Ahmed, Ismail Shah, Showkat Ahmad Lone, Abdelaziz Alsubie   +4 more
doaj   +1 more source

Performance of new nonparametric Tukey modified exponentially weighted moving average-Moving average control chart.

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, Saowanit Sukparungsee, Yupaporn Areepong   +2 more
doaj   +2 more sources

Monitoring the Zero-Inflated Time Series Model of Counts with Random Coefficient

Entropy, 2021
In this research, we consider monitoring mean and correlation changes from zero-inflated autocorrelated count data based on the integer-valued time series model with random survival rate.
Cong Li, Shuai Cui, Dehui Wang
doaj   +1 more source

Efficient signed-rank based EWMA and HWMA repetitive control charts for monitoring process mean with and without auxiliary information

Scientific Reports, 2023
Control charts are powerful tools to observe the presentation of the manufacturing process. Mostly, when the data in industries come from the process may follow non-normal or unknown distributions.
Ambreen Shafqat, Huang Zhensheng, Muhammad Aslam   +2 more
doaj   +1 more source

Neutrosophic multivariate EWMA control chart [PDF]

Decision Science Letters, 2023
The MEWMA chart is one of the traditional multivariate charts which are widely employed in inspecting the quality of manufacturing and services.
Wibawati Wibawati, Muhammad Ahsan, Hidayatul Khusna   +2 more
doaj   +1 more source