Results 251 to 260 of about 420,626 (277)

Special Control Charts Using Intelligent Techniques: EWMA Control Charts

2015
In this chapter we consider the economical design of EWMA zone control charts for set of machines operating under JPS (Jidoka Production System). We provide an extensive literature review of intelligent systems in quality control deductively to fit our purposes.
Bulut Aslan, Yeliz Ekinci, Ayhan Özgür Toy   +2 more
openaire   +1 more source

Fuzzy EWMA and Fuzzy CUSUM Control Charts

2016
Exponentially Weighted Moving- Averages (EWMA) and Cumulative-Sum (CUSUM) control charts have the ability of detecting small shifts in the process mean. Classical EWMA and CUSUM charts are not capable to capture the uncertainty in case of incomplete data.
Erginel, Nihal, Şentürk, Sevil
openaire   +1 more source

Linking EWMA p Charts and the Risk Adjustment Control Charts

Quality and Reliability Engineering International, 2016
This paper develops an adaptive exponentially weighted moving average (EWMA) chart that can be used as either a p chart for monitoring significant departures from in‐control non‐homogenous probabilities of failure or success or a risk‐adjusted control chart for success or failure of an event.
openaire   +1 more source

The Efficiency of the New Extended EWMA Control Chart for Detecting Changes Under an Autoregressive Model and Its Application

Symmetry
Control charts are frequently used instruments for process quality monitoring. Another name for the NEEWMA control chart is the new extended exponentially weighted moving average (new extended EWMA) control chart.
Kotchaporn Karoon, Y. Areepong
semanticscholar   +1 more source

On EWMA Charts for Time Series

1997
Several authors have studied the effect of autocorrelation on the average run length of the Shewhart, EWMA and CUSUM chart, if the underlying observations are autocorrelated (e. g. Johnson and Bagshaw [12], Bagshaw and Johnson [3], Harris and Ross [11], Maragah and Woodall [14], Alwan [2]). As it has turned out, autocorrelation has a profound impact on
openaire   +1 more source

A Multivariate Poisson Adaptive EWMA Control Chart

Quality and Reliability Engineering International
ABSTRACTThe Multivariate Exponentially Weighted Moving Average (MEWMA) control chart is a highly recommended chart in the literature to monitor processes with the aim of detecting small and moderate process shifts. The MEWMA chart is designed to detect a predetermined shift size but not a range of different shift sizes simultaneously.
Aya A. Aly, Nesma A. Saleh, Mahmoud A. Mahmoud   +2 more
openaire   +1 more source

A Johnson's Type Transformation EWMA-S2 Control Chart

2010
This article demonstrates how a four parameters (bounded) Johnson SB transformation combined with an EWMA approach can be used to monitor the sample variance of a process. The resulting chart will be called an EWMA-J-S2 chart. In this article, the computation of both the control limits and the parameters of the Johnson SB transformation of the EWMA-J ...
CASTAGLIOLA P, CELANO, GIOVANNI, FICHERA, Sergio   +2 more
openaire   +2 more sources

A critical note on the exponentiated EWMA chart

Statistical Papers
Abdul Haq, W. Woodall
semanticscholar   +1 more source

Optimal design of the adaptive EWMA chart for the mean based on median run length and expected median run length

, 2019
A. Tang, P. Castagliola, Jinsheng Sun, Xuelong Hu   +3 more
semanticscholar   +1 more source

EWMA Control Charts Using Attributes Data

The Statistician, 1993
Anothai Trevanich, Patrick Bourke
openaire   +1 more source