Published

2006-07-01

INTERVALOS DE CONFIANZA PARA LOS ÍNDICES DE CAPACIDAD Cpm Y Cpmk EN PROCESOS ESTACIONARIOS GAUSSIANOS

CONFIDENCE INTERVALS FOR THE CAPABILITY INDICES Cpm AND Cpmk IN STATIONARY GAUSSIAN PROCESSES

Keywords:

autocorrelación, análisis de capacidad, índices de capacidad de procesos, estimación (es)
Autocorrelation, Process capability analysis, Process capability indices, Estimation (en)

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Authors

  • Rubén Darío Guevara Universidad del Tolima
  • José Alberto Vargas Universidad Nacional de Colombia
Los índices de capacidad suministran una medida numérica del ajuste que tiene un proceso a unos límites de especificación preestablecidos. Los procedimientos existentes para construir intervalos de confianza para los índices de capacidad Cpm y Cpmk en procesos estacionarios gaussianos muestran bajos porcentajes de cobertura. Este artículo presenta una nueva metodología para construir intervalos de confianza para los índices de capacidad Cpm y Cpmk, en procesos estacionarios gaussianos y mediante simulación analiza el porcentaje de cobertura para procesos AR(1).
Process capability indices provide a measure of how a process meets preset specification limits. Procedures to construct confidence intervals for Cpm and Cpmk for stationary gaussian processes show low coverage probabilities. This paper presents a new methodology for constructing confidence intervals for the indices Cpm and Cpmk for stationary gaussian processes and by simulation study the coverage percentage for AR(1) processes is calculated.

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Copyright (c) 2006 Revista Colombiana de Estadística

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