Journal ArticleDOI
X̄ charts with variable sample size
TLDR
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.Abstract:
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. This article considers the properties of the X chart when the size of each sample depends on what is observed in the preceding ..read more
Citations
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Assessing the quality of Product using statistical quality control maps: a case study"
A Comparison Between the Performances of Double Sampling Xbar and Variable Sample Size Xbar Charts
TL;DR: In this article, the authors compared the performance of the double sampling (DS) X and variable sample size (VSS) X charts with known and estimated process parameters and found that the DS X chart outperformed the VSS X chart for all ranges of shifts.
Journal ArticleDOI
Determining baseline profile by diffusion maps
TL;DR: A method for Phase I analysis based on diffusion maps and clustering to investigate historical profile data sets to establish a standard profile and is compared with those in the literature, showing that it has good performance and gives a better insight in the similarities of a real profile data set.
Journal ArticleDOI
The Effects of Skewed Distributions on the Performance of Variable Sample Size X Chart
TL;DR: In this paper, the effects of skewed distributions on the performance of the variable sample size (VSS) X chart were investigated and Monte Carlo simulation was adopted to evaluate the run-length performances of these two VSS X schemes for different levels of skewness corresponding to Weibull, lognormal and gamma distributions.
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
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 Article
Double sampling X charts
TL;DR: In this article, the double sampling X chart is proposed, which is the counterpart to double sampling plans, which offers better statistical efficiency (in terms of statistical efficiency) than double sampling plan.
Journal ArticleDOI
Double Sampling X̅ Charts
TL;DR: The purpose of this paper is to propose a new control chart, the double sampling X chart, which is the counterpart to double sampling plans, which offers better statistical efficiency.