تصفح Mathematics, Statistics & Physics حسب الموضوع "control charts"
السجلات المعروضة 1 -- 10 من 10
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An improved adaptive EWMA control chart for monitoring time between events with application in health sector
( John Wiley and Sons Ltd , 2023 , Article)Nonconforming events rarely occur in high-quality processes, and the time between events ((Formula presented.)) is likely to be followed by a skewed distribution, such as an exponential distribution. This paper proposes ... -
Auxiliary-information-based efficient variability control charts for Phase I of SPC
( John Wiley and Sons Ltd , 2020 , Article)The inclusion of correlated auxiliary variables into the monitoring scheme of quality characteristic of interest has gained notable attention in recent statistical process control (SPC) literature. Several authors have ... -
Bayesian EWMA control charts based on Exponential and transformed Exponential distributions
( John Wiley and Sons Ltd , 2021 , Article)In this paper, we proposed the Bayesian exponentially weighted moving average (EWMA) control charts for mean under the nonnormal life time distributions. We used the time between events data which follow the Exponential ... -
Multivariate control charts for monitoring process mean vector of individual observations under regularized covariance estimation
(2021 , Article)Multivariate control charts are generally used in industries for monitoring and diagnosing processes characterized by several process variables. The applications of charts assume that the in-control process parameters are ... -
New efficient exponentially weighted moving average variability charts based on auxiliary information
( John Wiley and Sons Ltd , 2020 , Article)Control chart is a well-known tool for monitoring the performance of an ongoing process. The variability of a process is an important parameter that may deteriorate the process performance if it is not taken care on time. ... -
On designing a sequential based EWMA structure for efficient process monitoring
( Taylor and Francis Ltd. , 2020 , Article)Control chart is a popular technique that is widely used in statistical process control to identify any possible deviations from a stable state of a process. Shewhart charts are famous for identifying larger shifts, while ... -
On improved dispersion control charts under ranked set schemes for normal and non-normal processes
( John Wiley and Sons Ltd , 2019 , Article)In manufacturing industries, control charts are the promising statistical tools used for an efficient monitoring of processes. These charts enhance the product quality by timely signaling for special variations at any stage ... -
On improved monitoring of linear profiles under modified successive sampling
( John Wiley and Sons Ltd , 2019 , Article)Control charts are often used for the monitoring of quality characteristics of interest. There may exist some other characteristics that are associated with the main quality characteristic. A model that quantifies the ... -
On Model Selection for Autocorrelated Processes in Statistical Process Control
( John Wiley and Sons Ltd , 2017 , Article)Using traditional control charts to monitor autocorrelated processes is not beneficial, because it will lead us to misleading detections in the processes. One of the methods used to deal with the control charts for ... -
Optimization design of the CUSUM and EWMA charts for autocorrelated processes
( John Wiley and Sons Ltd , 2017 , Article)The traditional control charts produce frequent false alarm signals in the presence of autocorrelation. The implementation of the modified chart scheme is a way of handling the problem of autocorrelation in control charts. ...