Results 21 to 30 of about 416,034 (304)

A Variable Control Chart under the Truncated Life Test for a Weibull Distribution

open access: yesTechnologies, 2018
In this manuscript, a variable control chart under the time truncated life test for the Weibull distribution is presented. The procedure of the proposed control chart is given and its run length properties are derived for the shifted process. The control
Nasrullah Khan   +3 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

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

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

Stability of Approximations of Average Run Length of Risk-Adjusted CUSUM Schemes Using the Markov Approach: Comparing Two Methods of Calculating Transition Probabilities [PDF]

open access: yes, 2007
Risk-adjusted CUSUM schemes are designed to monitor the number of adverse outcomes following a medical procedure. An approximation of the average run length (ARL), which is the usual performance measure for a risk-adjusted CUSUM, may be found using its ...
Webster, Ronald A., Pettitt, Anthony N.
core   +1 more source

An Expected Average Run Length (EARL) Performance Comparison of the SSGR and EWMA Control Charts

open access: yes, 2023
The acceleration use of control charts in industrial processes has led to the effectiveness in their evaluation by quality practitioners. This is crucial, as it influences their decisions on the choice of which control charts to employ.
Khoo, M.B.C.   +4 more
core   +3 more sources

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

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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