A combined npx X control chart to monitor the process mean in a two-stage sampling

dc.creatorSampaio, Elvis S.
dc.creatorHo, Linda Lee
dc.creatorMedeiros, Pledson G. de
dc.date2023-04-05T20:57:09Z
dc.date2023-04-05T20:57:09Z
dc.date2013-06
dc.date.accessioned2023-09-04T12:16:12Z
dc.date.available2023-09-04T12:16:12Z
dc.identifierSAMPAIO, Elvis S.; HO, Linda Lee; MEDEIROS, Pledson G. de. A Combined npx−X¯ control chart to monitor the process mean in a two-stage sampling. Quality and Reliability Engineering International (Print), v. 30, p. 1003-1013, 2014. Disponível em: http://onlinelibrary.wiley.com/doi/10.1002/qre.1528/abstract;jsessionid=422BA9D78605B9EDDCD6ED5B9CA410E7.f03t03. Acesso em: 08 dez. 2017
dc.identifierhttps://repositorio.ufrn.br/handle/123456789/52057
dc.identifier10.1002/qre.1528
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8599959
dc.descriptionThis paper proposes a new combined npx X control chart for monitoring the mean of a process. A sample of size n is split into two sub-samples of sizes n1 and n2 =n-n1, determined by an optimization search. The units of the first sub-sample are evaluated by attributes and plotted on an npx control chart. If this chart signals an out-of-control condition, then values of the quality characteristic of interest are collected from the units of the second sub-sample, and the sample mean is calculated and plotted on an X control chart. If both control charts signal, then the process is halted for adjustment. The possibility that all n items will not be inspected may lead to a reduction in both the cost and time spent on examining the sampled items. The performance of the proposed procedure is compared to that of two separate X and npx control charts. The proposed procedure exhibits superior performance to the X control chart for a variety of sample sizes, n, and shifts, d, of the target mean. The average time to signal (ATS) for the combined control chart was lower than that calculated for a single X or npx control chart, indicating that the combined control chart is an efficient tool for monitoring the process mean.
dc.languageen
dc.publisherQuality and Reliability Engineering International
dc.rightsAcesso Aberto
dc.subjectQuality control
dc.subjectMonitoring the process mean
dc.subjectControl chart
dc.subjectControl chart X¯
dc.subjectNpx control chart
dc.subjectCombined control chart
dc.titleA combined npx X control chart to monitor the process mean in a two-stage sampling
dc.typearticle


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