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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Journal ArticleDOI
Dynamic control charts for finite production runs
TL;DR: It is concluded that significant cost savings may be realized through the application of dynamic control charts and even greater benefits may be reaped by investing in process understanding and improvements.
Journal ArticleDOI
Control Charts Applying a Sequential Test at Fixed Sampling Intervals
TL;DR: The sampling rate in a control chart, however, can be varied depending on what is observed from the process in order to reduce the average time taken to produce the control chart as discussed by the authors.
Dissertation
Control charts applying a sequential test at fixed sampling intervals with optional sampling at fixed times
TL;DR: Traditional control charts take samples from the process using a fixed sample size and fixed sampling interval, however, the sampling rate in a control chart can be varied depending on what is observed from the processes in order to reduce the average sampling rate.
Journal ArticleDOI
A comparison of T 2 control charts with variable sampling schemes as opposed to MEWMA chart
Francisco Aparisi,César L. Haro +1 more
TL;DR: In this paper, a T 2 control chart with variable sample size and variable sampling frequency is developed to detect faster shifts in the mean vector and a comparison with a MEWMA chart is made.
Journal ArticleDOI
Economic design of a vp x chart
TL;DR: An economic model for X control charts having all design parameters varying in an adaptive way, that is, in real time considering current sample information, is developed.
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.