Results 231 to 240 of about 2,211,008 (287)

Phase II monitoring of process variability in multichannel profiles. [PDF]

PLoS One
Jalilibal Z, Amiri A, Ahmadi O.
europepmc   +1 more source

Radiomics Analysis of QUS Spectral Parametric Images for Predicting the Risk of Breast Cancer Recurrence. [PDF]

Cancers (Basel)
Osapoetra LO, Dinniwell G, Anzola Pena ML, Alberico D, Sannachi L, Czarnota GJ.   +5 more
europepmc   +1 more source

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Optimal exponentially weighted moving average charts with estimated parameters based on median run length and expected median run length

International Journal of Production Research, 2016
This paper examines the exponentially weighted moving average (EWMA) chart with estimated process parameters. As the run length distribution is skewed when the process is in-control or slightly out-of-control, the average run length (ARL) provides less meaningful interpretation of a chart’s performance.
You, H.W., Khoo, Michael B.C., Castagliola, Philippe, Qu, Liang   +3 more
openaire   +4 more sources

Average Run Lengths of Exponentially Weighted Moving Average Control Charts

Journal of Quality Technology, 1987
A computer program is presented that calculates the average run length of exponentially weighted moving average charts for controlling the mean of a normal process...
openaire   +3 more sources

Approximations to the Average Run Length in Cumulative Sum Control Charts

Technometrics, 1975
An approximation to the average run length for cumulative sum control charts is derived using the analogy between this procedure and the sequential probability ratio test for normal observations. This approximation is also derived by using a Brownian motion approximation to the cumulative sum.
exaly   +5 more sources

Is Average Run Length to False Alarm Always an Informative Criterion?

Sequential Analysis, 2008
Apart from Bayesian approaches, the average run length (ARL) to false alarm has always been seen as the natural performance criterion for quantifying the propensity of a detection scheme to make false alarms, and no researchers seem to have questioned this on grounds that it does not always apply.
Yajun Mei
openaire   +3 more sources

Average run length when monitoring capability indices using EWMA

Quality and Reliability Engineering International, 2008
AbstractIn order to monitor unstable but capable processes Castagliola and Vännman have recently suggested a procedure based on an EWMA approach, called EWMA capability chart, for monitoring Vännman's Cp(u,v)‐family of capability indices and showed how their proposed approach efficiently monitors capable processes by detecting a decrease or increase in
Castagliola, Philippe, Vännman, Kerstin
openaire   +2 more sources

Average Run Lengths of Geometric Moving Average Charts by Numerical Methods

Technometrics, 1978
A numerical procedure is presented for the tabulation of average run lengths (ARL's) of geometric moving average charts. Both one-and two-sided ARL's are given for various settings of the control limits, smoothing constant and shift in the nominal level of the process mean. Where comparison is possible.
P. B. Robinson, T. Y. Ho
openaire   +1 more source

A Note on Average Run Lengths of Moving Average Control Charts

Economic Quality Control, 2004
Using a counter example, we show that the formula for computing the Average Run Lengths (ARL) of a moving average control chart (MA) in Wetherill and Brown (1991) is incorrect. However, we conjecture that the formula may provide an upper bound for the ARL of a moving average control chart.
Lingyun Zhang, C. D. Lai, K. Govindaraju, M. Bebbington   +3 more
openaire   +1 more source