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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Gráficos adaptativos de controle por atributos e seu projeto na prática
TL;DR: In this article, an adaptive scheme for the c, np, u, and p charts that allows one to vary one, two, or all design parameters (sample size, sampling interval and control limit width) was proposed.
Journal ArticleDOI
Evaluating the performance of variable sampling interval Hotelling T 2 charting scheme for compositional data in the presence of measurement error
TL;DR: In this paper , measurement error (ME) has been applied to investigate the effectiveness of the Hotelling T2 charting scheme for compositional data (CoDa) using variable sampling interval (VSI) scheme.
Journal ArticleDOI
New Results in Economic Statistical Quality Control
TL;DR: In this paper, a new adaptive sampling method was presented for application in the economic statistical control context, and the main conclusion is that the new approach seems to be useful for practical purposes as it is comparatively simple and also allows for some reductions in terms of the total expected costs per cycle.
Journal ArticleDOI
Distribution-free double-sampling precedence monitoring scheme to detect unknown shifts in the location parameter
Jean-Claude Malela-Majika,Sandile Charles Shongwe,Muhammad Aslam,Zhi Lin Chong,Eeva Maria Rapoo +4 more
Journal ArticleDOI
OWave control chart for monitoring the process mean
TL;DR: In this paper, a control chart for monitoring the process mean, called OWave (Orthogonal Wavelets), is proposed, which is based on weighted wavelets coefficients, which are provided through the Discrete Wavelets Transform using Daubechies db 2 wavelets family.
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.