Design and Analysis of Control Charts for Standard Deviation with Estimated Parameters

• Autores: Marit Schoonhoven, Muhammad Riaz, Ronald J. M. M. Does
• Localización: Journal of quality technology: A quarterly journal of methods applications and related topics, ISSN 0022-4065, Vol. 43, Nº. 4, 2011, págs. 307-333
• Idioma: inglés
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• Resumen

  • This paper explores an extensive range of statistics for the estimation of in-control standard deviation and designs a control chart for real-time process monitoring through determination of the control limit factors. The performance of the control chart is assessed for both contaminated and uncontaminated estimation data. A robust evaluation method is proposed based on the mean absolute deviation from the median combined with a simple screening method. This approach performs better than both traditional methods and other robust proposals if the estimation data is contaminated.