Results 11 to 20 of about 2,211,008 (287)
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
doaj +5 more sources
A New Control Chart for Monitoring Reliability Using Sudden Death Testing Under Weibull Distribution [PDF]
IEEE Access, 2017 In this paper, a new control chart using sudden death testing is designed by assuming that the lifetime/failure time of the product follows the Weibull distribution. The structure of the proposed chart is presented.
Muhammad Aslam +2 more
doaj +3 more sources
A Multivariate Control Chart for Monitoring Several Exponential Quality Characteristics Using EWMA [PDF]
IEEE 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 +3 more sources
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
openaire +1 more source
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
doaj +1 more source
Walailak Journal of Science and Technology, 2021 An ideal gas is a gas in the form of a particle or molecule. Its velocity and kinetic energy are interesting topics in several studies in physical chemistry.
Yupaporn AREEPONG, Rapin SUNTHORNWAT
doaj +3 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source