Search
Now showing items 1-10 of 13
Mixed EWMA-CUSUM and mixed CUSUM-EWMA modified control charts for monitoring first order autoregressive processes
(
Taylor and Francis Ltd.
, 2017 , Article)
In practice most processes are known to produce autocorrelated observations. Autocorrelation degrades the performance of control charts by producing frequent false alarms when the process is stable or makes the charts ...
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 ...
Enhancing the performance of the EWMA control chart for monitoring the process mean using auxiliary information
(
John Wiley and Sons Ltd
, 2019 , Article)
When using control charts to monitor manufacturing processes, the exponentially weighted moving average (EWMA) control chart is useful for detecting persistent shifts in the process parameter. This paper proposes enhancements ...
Location charts based on ranked set sampling for normal and non-normal processes
(
John Wiley and Sons Ltd
, 2019 , Article)
Control charts, based on ranked set sampling schemes, had been proposed recently for efficient monitoring of process location. All the proposals in the literature are based on the ideal assumption of normally distributed ...
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. ...
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 ...
Directionally sensitive homogeneously weighted moving average control charts
(
Wiley
, 2021 , Article)
One-sided control charts for monitoring changes in the mean level are proposed in this paper. The proposed charts are given in the form of a homogeneously weighted moving average technique that provides efficient monitoring ...
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 ...
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. ...
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 ...