Results 21 to 30 of about 756,444 (275)

Order statistics in control charts construction

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2016
Order statistics are applied in construction of control charts that are used in statistical process control. Control charts monitor the average process level, volatility or extreme values: maximum and minimum.
Dorota Anna Pekasiewicz
doaj   +1 more source

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

A simple approach for monitoring business service time variation. [PDF]

open access: yes, 2014
Control charts are effective tools for signal detection in both manufacturing processes and service processes. Much of the data in service industries comes from processes having nonnormal or unknown distributions.
Arnold, Barry C, Yang, Su-Fen
core   +3 more sources

Mixed Control Charts Using EWMA Statistics

open access: yesIEEE Access, 2016
In this paper, two mixed control charts are designed for process monitoring when the quality characteristic of interest follows a normal distribution.
Muhammad Aslam   +3 more
doaj   +1 more source

A Fuzzy EWMA Attribute Control Chart to Monitor Process Mean

open access: yesInformation, 2018
Conventional control charts are one of the most important techniques in statistical process control which are used to assess the performance of processes to see whether they are in- or out-of-control.
Muhammad Zahir Khan   +4 more
doaj   +1 more source

Fuzzy Approach to Statistical Control Charts

open access: yesJournal of Applied Mathematics, 2013
After investigating the advantages and disadvantages of current methods of statistical process control, it becomes important to overcome the disadvantages and then use the advantages to improve a method for monitoring a process with categorical ...
Shahryar Sorooshian
doaj   +1 more source

New Machine-Learning Control Charts for Simultaneous Monitoring of Multivariate Normal Process Parameters with Detection and Identification

open access: yesMathematics, 2023
Simultaneous monitoring of the process parameters in a multivariate normal process has caught researchers’ attention during the last two decades. However, only statistical control charts have been developed so far for this purpose.
Hamed Sabahno, Seyed Taghi Akhavan Niaki
doaj   +1 more source

Research on fuzzy control charts for fuzzy multilevel quality characteristics

open access: yesInternational Journal of Metrology and Quality Engineering, 2021
Fuzzy control charts are proposed to solve the problem that traditional control charts cannot be applied to fuzzy quality characteristics. First, fuzzy quality characteristics are converted to representative statistics, which are fuzzy mode ...
Zhou Juan, Huang Yuhang, Wu Zonghuan
doaj   +1 more source

Analysis of Traditional and Fuzzy Quality Control Charts to Improve Short-Run Production in the Manufacturing Industry

open access: yesJournal of Engineering, 2023
Quality control charts are limited to controlling one characteristic of a production process, and it needs a large amount of data to determine control limits to control the process.
Reyam Raheem Jabbar   +1 more
doaj   +1 more source

Poisson regression charts for the monitoring of surveillance time series [PDF]

open access: yes, 2006
This paper presents a Poisson control chart for monitoring time series of counts typically arising in the surveillance of infectious diseases. The in-control mean is assumed to be time-varying and linear on the log-scale with intercept and seasonal ...
Höhle, Michael
core   +2 more sources

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