Results 81 to 90 of about 3,384 (212)

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

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   +1 more source

COMPARISON OF EXPONENTIALLY WEIGHTED MOVING AVERAGE CONTROL CHART WITH HOMOGENEOUSLY WEIGHTED MOVING AVERAGE CONTROL CHARTS AND ITS APPLICATION

Barekeng
The Exponentially Weighted Moving Average (EWMA) control chart is a widely used memory-type control chart known for detecting small shifts in process means.
Erna Tri Herdiani, Mustabsyirah Mustabsyirah   +1 more
doaj   +1 more source

Design of EWMA Control Charts for Assuring Predetermined Production Process Quality [PDF]

, 2013
Jitao Fang, Hui Wang, Weiwei Deng
openalex   +1 more source

Monitoring process mean with a new EWMA control chart Um novo gráfico de controle EWMA para monitoramento da média de processo

Production, 2011
In practice, sometimes the process data did not come from a known population distribution. So the commonly used Shewhart variables control charts are not suitable since their performance could not be properly evaluated.
Yang Su-Fen, Tsai Wen-Chi, Huang Tzee-Ming, Yang Chi-Chin, Cheng Smiley   +4 more
doaj  

A study on the effects of a skewed distribution on the EWMA and MA charts [PDF]

, 2014
Jeng Young Liew, Michael B. C. Khoo, Siang Gee Neoh   +2 more
openalex   +1 more source

A Review and Evaluation of Statistical Process Control Methods in Monitoring Process Mean and Variance Simultaneously [PDF]

Journal of Optimization in Industrial Engineering, 2010
In this paper, first the available single charting methods, which have been proposed to detect simultaneous shifts in a single process mean and variance, are reviewed.
Ahmad Ostadsharifmemar, Seyed Taghi Akhavan Niaki   +1 more
doaj  

Optimal designs of the exponentially weighted moving average (EWMA) median chart for known and estimated parameters based on median run length

, 2020
Zhi Lin Chong, Kian Lam Tan, Michael B. C. Khoo, Wei Lin Teoh, Philippe Castagliola   +4 more
openalex   +2 more sources

The ARL of EWMA Chart for Monitoring ZINB Model Using Markov Chain Approach [PDF]

, 2014
Chanaphun Chananet, Saowanit Sukparungsee, Yupaporn Areepong   +2 more
openalex   +1 more source

Valor em Risco (VaR) utilizando modelos de previsão de volatilidade: EWMA, GARCH e Volatilidade Estocástica

BBR: Brazilian Business Review, 2007
Este artigo explora três modelos utilizados para a estimativa da volatilidade: suavização exponencial - EWMA, volatilidade condicional - GARCH e volatilidade estocástica - VE. A volatilidade estimada por estes modelos pode ser utilizada em uma métrica de
Fernando Caio Galdi, Leonel Molero Pereira   +1 more
doaj  

THE MIXED UNIVARIATE CONTROL CHART EWMA AND CUSUM FOR FLAVOUR PRODUCTION QUALITY PROCESS MONITORING

Jurnal Matematika UNAND
A control chart is an important statistical technique used to monitor the average quality of a process or dispersion. Shewhart control chart is used to detect larger disturbances in process parameters.
Surya Puspita Sari, Maiyastri Maiyastri, Dodi Devianto   +2 more
doaj   +1 more source