Results 21 to 30 of about 173,902 (219)

Water Particles Monitoring in the Atacama Desert: SPC Approach Based on Proportional Data

Axioms, 2021
Statistical monitoring tools are well established in the literature, creating organizational cultures such as Six Sigma or Total Quality Management. Nevertheless, most of this literature is based on the normality assumption, e.g., based on the law of ...
Anderson Fonseca, Paulo Henrique Ferreira, Diego Carvalho do Nascimento, Rosemeire Fiaccone, Christopher Ulloa-Correa, Ayón García-Piña, Francisco Louzada   +6 more
doaj   +1 more source

On the Efficient Monitoring of Multivariate Processes with Unknown Parameters

Mathematics, 2020
Control charts are commonly used tools that deal with monitoring of process parameters in an efficient manner. Multivariate control charts are more practical and are of greater importance for timely detection of assignable causes in multiple quality ...
Nasir Abbas, Muhammad Riaz, Shabbir Ahmad, Muhammad Abid, Babar Zaman   +4 more
doaj   +1 more source

Monitoring the Weibull Scale Parameter Based on Type I Censored Data Using a Modified EWMA Control Chart

Axioms, 2023
In industrial production, the exponentially weighted moving average scheme is widely used to monitor shifts in product quality, especially small-to-moderate shifts.
Dan Yu, Li Jin, Jin Li, Xixi Qin, Zhichuan Zhu, Jiujun Zhang   +5 more
doaj   +1 more source

Monitoring Industrial Process using a Robust Modified Mean Chart

Austrian Journal of Statistics, 2019
Shewhart control chart is the most popular and widely used Statistical process Control tool to monitor process. It is developed under the assumption of independent and normally distributed process. In order to control process mean and standard deviation,
Marangattu R. Sindhumol, Michele Gallo, Mamandur R. Srinivasan   +2 more
doaj   +1 more source

Monitoring Betaine Using Interval Time Between Events Control Chart

Frontiers in Nutrition, 2022
A generalization of moving average (MA) control chart for the exponential distribution under classical statistics is presented in this article. The designing of the MA control chart for the exponential distribution under neutrosophic statistics is also ...
Muhammad Saleem, Nasrullah Khan, Muhammad Aslam   +2 more
doaj   +1 more source

A Novel Moving Average–Exponentiated Exponentially Weighted Moving Average (MA-Exp-EWMA) Control Chart for Detecting Small Shifts

Mathematics
Process monitoring plays a vital role in ensuring quality stability, and, operational efficiency across fields such as manufacturing, finance, biomedical science, and environmental monitoring.
Jun-Hao Lu, Chang-Yun Lin
doaj   +1 more source

A study on the performances of the run sum X̄ chart under the gamma process [PDF]

ITM Web of Conferences
The run sum (RS) X̄ chart is known as a simple and powerful tool for monitoring the mean of a process. Most developments of the RS X̄ chart assume that the underlying process comes from a normal distribution.
Le Goh Kai, Teoh Wei Lin, Chong Zhi Lin, Ong Kai Lin, El-Ghandour Laila   +4 more
doaj   +1 more source

Empirical Bayes Prediction for an Attribute Control Chart in Quality Monitoring

IEEE Access
A control chart is a valuable statistical tool used in production process control to ensure that products meet quality standards. The c-chart, a specific type of control chart, monitors the number of nonconformities or defects in a production process ...
Yadpirun Supharakonsakun
doaj   +1 more source

Hybrid EWMA Control Chart under Bayesian Approach Using Ranked Set Sampling Schemes with Applications to Hard-Bake Process

Applied Sciences, 2023
A memory-type control chart is an important tool of statistical process control for monitoring small to moderate shifts in the manufacturing process. Using the prior information by the Bayesian approach is helpful in control charts.
Imad Khan, Dost Muhammad Khan, Muhammad Noor-ul-Amin, Umair Khalil, Huda M. Alshanbari, Zubair Ahmad   +5 more
doaj   +1 more source

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd, Melissa Taylor, Helen Fulbright, Bob Phillips   +3 more
wiley   +1 more source