Optimal estimated process parameters side sensitive group runs chart based on expected average run length [PDF]
Heliyon, 2018 The side sensitive group runs (SSGR) chart is better than both the Shewhart and synthetic charts in detecting small and moderate process mean shifts. In practical circumstances, the process parameters are seldom known, so it is necessary to estimate them
Huay Woon You
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On moving average control charts and their conditional average run lengths [PDF]
Quality and Reliability Engineering International, 2021 AbstractMoving average control charts have been presented in the Quality Control literature in the past 75 years; however, their conditional average run lengths have not been obtained. The objective of this article is to derive the autocorrelation function between two moving averages, and then make application of the bivariate normal distribution to ...
Saeed Maghsoodloo, Dilcu Barnes
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New statistical process control charts for overdispersed count data based on the Bell distribution [PDF]
Anais da Academia Brasileira de Ciências, 2023 Poisson distribution is a popular discrete model used to describe counting information, from which traditional control charts involving count data, such as the c and u charts, have been established in the literature.
LAION L. BOAVENTURA +4 more
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Process Monitoring Using Truncated Gamma Distribution
Stats, 2023 The time-between-events idea is commonly used for monitoring high-quality processes. This study aims to monitor the increase and/or decrease in the process mean rapidly using a one-sided exponentially weighted moving average (EWMA) chart for the ...
Sajid Ali +3 more
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A Combined Runs Rules Scheme for Monitoring General Inflated Poisson Processes
Mathematics, 2023 In this work, a control chart with multiple runs rules is proposed and studied in the case of monitoring inflated processes. Usually, Shewhart-type control charts for attributes do not have a lower control limit, especially when the in-control process ...
Eftychia Mamzeridou +1 more
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Mathematics, 2022 In addition to monitoring the Poisson mean rate with step shifts, increasing attention has been given to monitoring Poisson processes subject to linear trends.
Honghao Zhao +3 more
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Designing the multivariate nonconforming proportion control charts considering the measurement error [PDF]
International Journal of Research in Industrial Engineering, 2021 Most qualitative characteristics cannot be easily reported numerically. In such cases, each product is inspected and usually divided into two conforming and nonconforming groups based on their qualitative characteristics.
Seyed Mohsen Ebrahimi +1 more
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Nonparametric Cusum Charts for Circular Data with Applications in Health Science and Astrophysics
Revstat Statistical Journal, 2020 This paper develops non-parametric rotation invariant CUSUMs suited to the detection of changes in the mean direction as well as changes in the concentration parameter of circular data.
F. Lombard +2 more
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Monitoring Betaine Using Interval Time Between Events Control Chart
Frontiers in Nutrition, 2022 A generalization of moving average (MA) control chart for the exponential distribution under classical statistics is presented in this article. The designing of the MA control chart for the exponential distribution under neutrosophic statistics is also ...
Muhammad Saleem +2 more
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Explicit analytical solutions for the average run length of modified EWMA control chart for ARX(p,r) processes [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2021 Statistical process control (SPC) plays a necessary role in manufacturing industry processes. An essential tool for SPC used for monitoring, measuring, controlling, and improving quality in various fields is the control chart.
Korakoch Silpakob +3 more
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