Results 21 to 30 of about 6,163,769 (300)

A Comparison of Shewhart-Type Time-Between-Events Control Charts Based on the Renewal Process

open access: yesIEEE Access, 2020
To study the high quality processes, time-between-events (TBE) control charts have several advantages over the ordinary control charts. However, the existing TBE charts are based on the exponential distribution, which limit the application of these ...
Sajid Ali   +3 more
doaj   +1 more source

A Multivariate Control Chart for Monitoring Several Exponential Quality Characteristics Using EWMA

open access: yesIEEE Access, 2018
In this paper, we propose a new multivariate control chart for monitoring several exponential distributed characteristics. We transform each exponential variable into the one following an approximately normal distribution.
Nasrullah Khan   +3 more
doaj   +1 more source

Monitoring Reliability for Three-Parameter Frechet Distribution Using Control Charts

open access: yesIEEE Access, 2020
Control Charts for attributes have been widely adopted for examining the fraction non-conforming or non-conformities in a process. However, Shewhart control charts may face some practical problems when the process fraction of non-conformities is very low.
Youlong Wu   +4 more
doaj   +1 more source

Steady-state average run length(s)

open access: yes, 2021
The average run length (ARL), with its various phenotypes, is the prevailing performance measure for evaluating control charts, or change-point detection schemes.
Knoth, Sven
core   +1 more source

Designing of control chart of extended EWMA statistic using repetitive sampling scheme

open access: yesAin Shams Engineering Journal, 2021
In this paper, we propose extended exponential weighted moving average (EEWMA) control chart (CC) for the surveillance the process mean using repetitive sampling scheme under the assumption that quality characteristic of a product is a quantitative ...
Muhammad Naveed   +4 more
doaj   +1 more source

ON PERFORMANCE OF METHODS FOR STATISTICAL SURVEILLANCE [PDF]

open access: yes, 1994
Statistical surveillance is used to detect a change in a process. It might for example be a change of the level of a characteristic of an economic time series or a change of heart rate in intensive care.
Åkermo, Göran
core   +1 more source

On designing new mixed modified exponentially weighted moving average - exponentially weighted moving average control chart

open access: yesResults in Engineering, 2023
Control charts are an extremely valuable tool in statistical process control (SPC) for processing information from a system or procedure over time and displaying statistically significant changes in data while also showing how a system or process is ...
Khanittha Talordphop   +2 more
doaj   +1 more source

COMPARISON BETWEEN TWO METHODS OF SURVEILLANCE: EXPONENTIALLY WEIGHTED MOVING AVERAGE VS CUSUM [PDF]

open access: yes, 1993
When control charts are used in practice it is necessary to know the characteristics of the charts in order to know which action is appropriate at an alarm.
Åkermo, Göran, Frisén, Marianne
core   +1 more source

A Double Sampling Scheme for Process Mean Monitoring

open access: yesIEEE Access, 2017
Mean control charts are effective tools for detecting mean shifts of an interesting quality variable in both manufacturing processes and service processes.
Su-Fen Yang, Sin-Hong Wu
doaj   +1 more source

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