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Some Comments Regarding the Synthetic Chart

2014; Taylor & Francis; Volume: 43; Issue: 14 Linguagem: Inglês

10.1080/03610926.2012.683128

ISSN

1532-415X

Autores

Marcela Aparecida Guerreiro Machado, Antônio Fernando Branco Costa,

Tópico(s)

Advanced Statistical Methods and Models

Resumo

AbstractThe steady-state average run length (ARL) is a function of the in-control probabilities of being in each nonabsorbing state. Davis and Woodall (2002) tabulated values that are significantly smaller than the steady-state ARLs, because they used the out-of-control probabilities. The synthetic chart signals when a second sample point falls beyond the control limits, no matter whether one of them falls above the centerline and the other falls below it. The side-sensitive version of the synthetic chart does not signal when the points beyond the control limits are on opposite sides. With this rule, the chart detects mean changes more quickly.Keywords: Shewhart chartSide-sensitive ChartSteady-state average run lengthMathematics Subject Classification: 62P30

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