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New robust capability ratios approaches for quality control

  • Salvador Naya [2] ; Andrés Devia-Rivera [3] ; Javier Tarrío-Saavedra [2] ; Miguel Flores [1]
    1. [1] Escuela Politécnica Nacional

      Escuela Politécnica Nacional

      Quito, Ecuador

    2. [2] EscuelaPolitécnica Superior, Departamento de Matemáticas. Grupo MODES, Universidad de A Coruña, España
    3. [3] Departamento de Marketing Comercial, Avon Cosmetics S.A.U., Madrid
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  • Localización: DYNA: revista de la Facultad de Minas. Universidad Nacional de Colombia. Sede Medellín, ISSN 0012-7353, Vol. 83, Nº. 198, 2016, págs. 94-101
  • Idioma: inglés
  • DOI: 10.15446/dyna.v83n198.49930
  • Títulos paralelos:
    • Nueva propuesta de índices de capacidad robustos para el control de la calidad
  • Enlaces
  • Resumen
    • español

      En este trabajo, se proponen dos nuevos índices de capacidad robustos para detectar la influencia de los factores que pueden causar grandes desviaciones de las especificaciones técnicas del proceso. El comportamiento de estos nuevos índices se analizó mediante la comparación de su rendimiento con respecto a otras medidas de capacidad ampliamente estudiados en la literatura. El trabajo tiene como objetivo investigar la robustez de estos nuevos índices de capacidad bajo la presencia de valores extremos y de falta de normalidad. Para este propósito, se aplicaron técnicas de remuestreo Bootstrap para detectar la verdadera capacidad potencial de un proceso a través de los métodos de inferencia estadística. La precisión de los índices propuestos es discutida por medio de resultados numéricos con un ejemplo de datos reales.

    • English

      Robustness of process capability measurements is a very important matter in statistical quality control. In this paper, two new classes of capability measurements are studied as robust mechanisms to detect the influence of factors that may cause large departures from the process’ engineering specifications. The behavior of the new indices was analyzed by comparing their performance to other capability measures that have been widely studied in literature. The paper aims to investigate the robustness of the new capability ratios under the presence of outliers and a lack of normality. For this purpose, bootstrap techniques were applied to detect the true potential capability of a process via statistical inference methods. The accuracies of the proposed indices are discussed by means of numerical results from a real data example.

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