Nonparametric Capability Indices

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2003Publisher:Walter de Gruyter GmbHJournal:Economic Quality Control, volume 18 (issn: 0940-5151, eissn: 1869-6147,

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Authors: Ramanathan, T. V.; Dharmadhikari, A. D.; Abraham, Bovas;

doi: 10.1515/eqc.2003.31

Nonparametric Capability Indices

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Abstract

Summary: The process capability indices \(C_{p}\) and \(C_{pk}\) are widely used in statistical quality control to assess the capability of a process. These indices are defined, based on the assumption that the quality characteristic follows a normal distribution. In this paper two new capability indices are considered, which do not depend on any distributional assumptions. The estimation and asymptotic properties of the estimators of these indices are investigated. Two examples are given to illustrate the importance of the given indices and their computational procedures.

Keywords

estimation, capability, non-normal, Applications of statistics in engineering and industry; control charts, Estimation in survival analysis and censored data

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