1997
DOI: 10.1080/00224065.1997.11979750
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Chart with Variable Sample Size and Sampling Intervals

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Cited by 190 publications
(81 citation statements)
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“…The economic control chart is a design method which adopts the optimization strategy to consider cost and quality and minimize quality loss. In this study, the cost model proposed by Costa (Costa, 1993(Costa, , 1997) is used for the economic design of thẽ X control chart. The three assumptions in this model are as follows.…”
Section: Economic Performance Of the Control Chartmentioning
confidence: 99%
“…The economic control chart is a design method which adopts the optimization strategy to consider cost and quality and minimize quality loss. In this study, the cost model proposed by Costa (Costa, 1993(Costa, , 1997) is used for the economic design of thẽ X control chart. The three assumptions in this model are as follows.…”
Section: Economic Performance Of the Control Chartmentioning
confidence: 99%
“…A direção natural de prosseguimento da pesquisa era fazer variáveis tanto o tamanho de amostra quanto o intervalo de tempo entre amostras (VSSI -Variable Sample Size and Sampling Interval), ou então fazer variáveis todos os parâmetros, incluindo o fator de abertura dos limites de controle (Vp -Variable Parameters). Prabhu et al (1994) e Costa (1997Costa ( , 1998aCosta ( , 1999a fornecem uma descrição detalhada destes gráficos de X com todos os parâmetros adaptativos. A idéia de usar gráficos de parâmetros variáveis foi naturalmente estendida a outros esquemas estatísticos, tais como os gráficos de X e R, gráficos CUSUM e EWMA (ver Reynolds et al, 1990;Saccucci et al, 1992;e Costa, 1998be Costa, , 1999b.…”
Section: Introductionunclassified
“…Following Costa (1997), the speed with which a control chart detects process mean shifts measures its statistical efficiency. When the intervals between samples are fixed, the speed can be measured by the average run length (ARL).…”
Section: Performance Measurementioning
confidence: 99%