Published

2007-07-01

COMPARACIÓN DE ÍNDICES DE CAPACIDAD DE PROCESOS CON DATOS AUTOCORRELACIONADOS

COMPARISON OF PROCESS CAPABILITY INDICES UNDER AUTOCORRELATED DATA

Keywords:

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

Downloads

Authors

  • Rubén Darío Guevara Universidad de Ciencias Aplicadas y Ambientales
  • José Alberto Vargas Universidad Nacional de Colombia
Los índices de capacidad de un proceso suministran una información numérica acerca de cómo el proceso se ajusta a unos límites de especificación. En el cálculo de estos índices se asume que las observaciones son independientes; sin embargo, en aplicaciones industriales frecuentemente los datos están autocorrelacionados. Este artículo analiza los índices Cp,Cpk,Cpm y Cpmk cuando los datos presentan autocorrelación, se encuentran las varianzas para sus estimadores cuando los procesos son gaussianos y se calculan los porcentajes de cobertura para algunos intervalos de confianza.
The process capability indices provide a measure of how a process fits within the specification limits. In calculating indices is usual to assume that the process data are independent. However, in industrial applications data are often autocorrelated. This paper deals with the indices Cp, Cpk, Cpm and Cpmk when data are autocorrelated. Variances for their estimators are derived and coverage probabilities of some confidence intervals are calculated.

Article abstract page views

384

Downloads

Download data is not yet available.

How to Cite

COMPARISON OF PROCESS CAPABILITY INDICES UNDER AUTOCORRELATED DATA. (2007). Revista Colombiana De Estadística, 30(2), 301-316. https://revistas.unal.edu.co/index.php/estad/article/view/29581

License

Copyright (c) 2007 Revista Colombiana de Estadística

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).