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Title: Carta X_barra com Amostras de Tamanho Variável: Um Novo Procedimento Dinâmico
Authors: Infante, Paulo
Rodrigues Dias, José
Keywords: Statistical quality control
X Control chart
variable sample sizes
Issue Date: 2006
Publisher: APDIO
Abstract: In the last years a new class of control charts which parameters change during production was developed. In this paper, we present a new procedure that consists in a very simple and attractive method to vary the samples size. In this procedure, which is based in the idea presented by Rodrigues Dias (1999) to obtain different sampling intervals, the size of the following sample depends on the information in the last instant of inspection, assuming different values, in a distinct form that it happens when we use the technique usually known by VSS, which considers only two values. Some statistical properties are studied using, in particular, Markov chains. Using a control chart for the sample mean, we present and analyse, in a critical way, some results obtained for different changes of the quality. A comparative study with some previously developed procedures is also presented.
ISSN: 0874-5161
Type: article
Appears in Collections:CIMA - Publicações - Artigos em Revistas Nacionais Com Arbitragem Científica
MAT - Publicações - Artigos em Revistas Nacionais Com Arbitragem Científica

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