Results 1 to 10 of about 17,058 (192)
Assessing the effectiveness of the ZICOMP-Shewhart control chart for monitoring zero-inflated processes [PDF]
Scientific ReportsThe zero-inflated Conway-Maxwell Poisson (ZICOMP) distribution models count data with many zero observations. This distribution assumes that zero observations occur with probability $$\:p$$ , and the count of nonconformities in a product unit follows the
Aqsa Sattar +5 more
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Multiple optimality properties of the Shewhart test [PDF]
Sequential Analysis, 2014 For the problem of sequential detection of changes, we adopt the probability maximizing approach in place of the classical minimization of the average detection delay, and propose modified versions of the Shiryaev, Lorden and Pollak performance measures.
Moustakides, George V.
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Performance of discrete wavelet transform‐based method in the detection of influenza outbreaks in Iran: An ecological study [PDF]
Health Science Reports, 2023 Background and Aim Timely detection of outbreaks is one of the main purposes of the health surveillance system. The presence of appropriate methods in the detection of outbreaks can have an important role in the timely detection of outbreaks.
Sara Minaeian +3 more
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A comparative analysis of mean charts assuming Weibull and generalized exponential distributions [PDF]
HeliyonThis study discusses Shewhart control charts to monitor the mean of non-normally distributed data using extensive Monte Carlo simulations. In particular, Weibull, exponential, and generalized exponential distributions are used to conduct a systematic ...
Asad Raza +4 more
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Estimation in Shewhart control charts [PDF]
, 2000 The influence of the estimation of parameters in Shewhart control charts is investigated. It is shown by simulation and asymptotics that (very) large sample sizes are needed to accurately determine control charts if estimators are plugged in.
Albers, W., Kallenberg, W.C.M.
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On the sensitivity of robust control charts in monitoring contaminated data [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2021 Shewhart chart is typically formed under normality assumptions. In reality, much data is contaminated with occasional outliers, which may diminish the Shewhart chart’s sensitivity.
Kooi Huat Ng +3 more
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Using the Shewhart control charts by process control
Production Engineering Archives, 2013 This article deals with the statistics pursing the process capability of turning in screws production in RIBE Slovakia, k.s. in technical practice, an important group of statistic methods is formed by analyzing qualification of measures, production ...
Katarína Lestyánszka Škůrková
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Designing an Effective Combined Shewhart-CUSUM Control Scheme with Exponentially Distributed Data [PDF]
International Journal of Mathematical, Engineering and Management Sciences, 2019 In this paper, the Combined Shewhart-CUSUM control scheme has been proposed to monitor the production process when the quality characteristic follows exponential distribution to quickly detect the shift in the process.
Dushyant Tyagi
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CONTROL CHARTS MONITORING FOR QUALITY CONCRETE PAVEMENTS [PDF]
Scientific Journal of Silesian University of Technology. Series Transport, 2020 In this article, Control charts are employed to analyse the strength quality control of ready-mixed concrete for rigid pavement. The results of the study support that CUSUM statistical analysis is more sensitive than the Shewhart control chart. The CUSUM
Izabela SKZYPCZAK +3 more
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Mathematics, 2023 The quality characteristic(s) are assumed to follow the normal distribution in many control chart constructions, although this assumption may not hold in some instances.
Fatimah Alshahrani +5 more
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