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
Variable sampling interval EWMA chart for multivariate coefficient of variation
TL;DR: In this paper, a control chart for monitoring the multivariate coefficient of variation (MCV) is used when the focus is on monitoring the ratio of relative multivariate variability to the mean of a multivariate p...
Journal ArticleDOI
A Two Control Limits Double Sampling Control Chart by Optimizing Producer and Customer Risks
Dradjad Irianto,Ani Juliani +1 more
TL;DR: In this paper, double sampling (DS) control chart is proposed to improve the capability to detect any small shift out-of-control condition by observing the second sample without interruption.
Journal ArticleDOI
Economic statistical design of adaptive $$\bar{X}$$ control charts based on quality loss functions
TL;DR: For the first time in the literature, the Linex asymmetric loss functions are used, that results in the least average cost in all adaptive designs, compared to other symmetric Lossx loss functions.
Journal ArticleDOI
Exact run length distribution of the double sampling chart with estimated process parameters
TL;DR: In this article, the percentiles of the run length distribution for the double sampling (DS) X chart with estimated process parameters are computed and compared with the optimal ARL-based and median run length (MRL) based DS X chart.
Journal ArticleDOI
A importância dos gráficos de controle para monitorar a qualidade dos processos industriais: estudo de caso numa indústria metalúrgica
Anderson Gomes dos Santos,Edivan Ferreira de Lacerda,Hélio Cavalcanti Albuquerque Neto,Weidson Amaral Luna,Egidio Luiz Furlanetto +4 more
TL;DR: In this article, an exploratorio analyzes o CEP em uma empresa metalurgica, analysing a processo in a cenario competitivo.
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.