Robust Location Estimators for the X-bar Control Chart

• Autores: Marit Schoonhoven, Hafiz Z. Nazir, 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. 363-379
• Idioma: inglés
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• Resumen

  • Several robust methods are considered for estimating the location parameter based on the use of a control chart to study a historical dataset to identify disturbances. A new type of analysis is also proposed. These methods are evaluated for their mean-squared errors and their effect on the X-bar control charts used in real-time process monitoring. A control chart based on the trimmed trimean is shown to be superior to existing estimation methods.