Results 1 to 10 of about 10,505,082 (262)

Monitoring PH of Shrimp Water using Progressive Max Chart

open access: yesJTAM (Jurnal Teori dan Aplikasi Matematika)
Control charts aim to reduce variability in the process and monitor for out-of- control processes. So far, the process of monitoring quality is usually carried out partially, namely monitoring the mean process and process variability.
Niam Rosyadi   +5 more
doaj   +1 more source

Application of hotelling’s T² control chart for a machining process of the inside diameter of a steel cylinder

open access: yesGEPROS: Gestão da Produção, Operações e Sistemas, 2014
The quality of products and processes has proven to be crucial for companies to compete in the market. Statistical process control enables them to foresee problems in the process, thereby ensuring the quality of manufactured items.
Elisa Henning   +4 more
doaj  

Exponentially weighted moving average-Moving average charts for monitoring the process mean.

open access: yesPLoS 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   +1 more source

Quality Control Charts for EWMA with Wavelet Shrinkage: A Simulation Study [PDF]

open access: yesمجلة التربية والعلم
The study aims to utilise modern statistical techniques to analyze data often sensitive to small changes. Quality control charts are valuable tools for monitoring and analyzing data and identifying and extracting points that fall outside the control ...
Esraa Haydier   +3 more
doaj   +1 more source

An efficiency comparison of control chart for monitoring process variance: Non-normality case [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2005
The purposes of this research are to investigate the relation between upper control limit and parameters of weighted moving variance linear weight control chart (WMVL), weighted moving variance: exponential weight control chart (WMVE ), successive ...
Sangkawanit, R., Budsaba, K.
doaj  

The Use of Control Charts in Neonatal Death Monitoring

open access: yesTaṣvīr-i salāmat, 2011
Background and Objectives : Data are managed in two approaches in health information system:       Data–led and Action–led. In action–led approach, data are used in process improvement.
Mostafa Farah Bakhsh
doaj  

A New Dispersion Control Chart for Handling the Neutrosophic Data

open access: yesIEEE Access, 2020
The control chart based on mean deviation (MD ) is customary used as a robust alternative to the existing Shewhart control charts for observing changes in dispersion parameter of the process.
Zahid Khan   +4 more
doaj   +1 more source

Process capability index-based control chart for variables

open access: yesSouth African Journal of Industrial Engineering, 2017
This paper proposes a process capability index-based control chart for variables using the Downton estimator with a specified Cp value. The proposed chart is able to address the issue of control and capability simultaneously.
Adeoti, Olatunde Adebayo   +1 more
doaj   +1 more source

A Robust TEWMA–MA Control Chart Based on Sign Statistics for Effective Monitoring of Manufacturing Processes

open access: yesMathematics
A nonparametric control chart is a type of control chart that does not rely on assumptions regarding the underlying distribution of the data. This characteristic provides greater flexibility and robustness, particularly when handling non-normal data ...
Piyatida Saesuntia   +2 more
doaj   +1 more source

PETA KENDALI EWMA RESIDUAL PADA DATA BERAUTOKORELASI

open access: yesE-Jurnal Matematika, 2019
Control charts with  autocorrelation can be overcome by creating control chart with residuals from the best forecasting model. EWMA control chart is a alternative to the Shewhart control chart when detecting small shifts.
NI KADEK YUNI DEWIANTARI   +2 more
doaj   +1 more source

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