Journal ArticleDOI
X̄ Chart with Variable Sample Size and Sampling Intervals
TLDR
In this article, the X-bar chart with variable sampling intervals (VSI) and the variable sample size (VSS) are compared to the traditional X-Bar chart in detecting shifts in the process.Abstract:
Recent theoretical studies have shown that the X-bar chart with variable sampling intervals (VSI) and the X-bar chart with variable sample size (VSS) are quicker than the traditional X-bar chart in detecting shifts in the process. This article considers..read more
Citations
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Journal ArticleDOI
Research Issues and Ideas in Statistical Process Control
TL;DR: An overview of current research on control charting methods for process monitoring and improvement and a historical perspective and ideas for future research are given.
Journal ArticleDOI
Effects of Parameter Estimation on Control Chart Properties; A Literature Review
TL;DR: In this article, the control chart limits are calculated using parameter estimates from an in-control Phase I reference sample, and statistics based on new samples are compared with the estimated control limits to monitor for departures from the in..
Journal ArticleDOI
A Survey of Recent Developments in the Design of Adaptive Control Charts
TL;DR: In this paper, a survey of recent developments in the statistical and economic design of adaptive or dynamic charts that allow some of their parameters to change is presented, in a comprehensive way.
Journal ArticleDOI
X̄ Charts with Variable Parameters
TL;DR: This paper extends the study of the X chart with variable parameters to include variable action limits, and presents a meta-analyses of the response of the immune system to these limits.
Journal ArticleDOI
EWMA control charts with variable sample sizes and variable sampling intervals
TL;DR: It is shown that using either the VSS or VSI feature in an EWMA control chart substantially improves the ability to detect all but very large shifts in the process mean.
References
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Journal ArticleDOI
X charts with variable sampling intervals
TL;DR: The variable sampling interval (VSI) chart as discussed by the authors uses a short sampling interval if the sample is close to but not actually outside the control limits, and a long sampling interval for the sample if it is closer to target.
Journal ArticleDOI
Combined Shewhart-CUSUM Quality Control Schemes
TL;DR: The SheWhart-CUSUM quality control scheme which combines the key features of the Shewhart and CUSUM control procedures is described and evaluated.
Journal ArticleDOI
X̄ charts with variable sample size
TL;DR: In this article, the authors considered the properties of the X chart when the size of each sample depends on what is observed in the preceding hours and the usual practice in using a control chart to monitor a process is to take samples of size n from the process every h hours.
Journal ArticleDOI
A Combined Adaptive Sample Size and Sampling Interval X Control Scheme
TL;DR: In this paper, a combine X control chart is proposed, where the process control engineer waits until the control scheme signals an out-of-control condition, and then the process can be restarted.
Journal ArticleDOI
X¯ chart with adaptive sample sizes
TL;DR: In this paper, the adaptive-sample-size control chart is compared with the fixed-sample size control chart in terms of average run length under shifts in the process mean of variable magnitude.