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SaberEs

versão impressa ISSN 1852-4418versão On-line ISSN 1852-4222

Resumo

DIANDA, Daniela F.; QUAGLINO, Marta B.; PAGURA, José A.  e  CASTRO, María Laura De. Measurement error effect on process capability indices. SaberEs [online]. 2016, vol.8, n.2, pp.91-110. ISSN 1852-4418.

The importance of process capability analysis stems from the customer satisfaction philosophy present in all quality projects. A process will be satisfactory provided that their products meet the requirements imposed by technical considerations as well as by market demands. Over the past 30 years a variety of indexes has been developed to compare the process performance with the specifications, although most of these advances assume that there are no measurement errors in the collected data, a fact that is hardly true in practice. Even the use of gauges of leading technology does not guarantee accurate and precise data. If this is ignored and the measurement system is inadequate, the data will not reflect the reality of the process, leading to wrong conclusions. This paper presents a brief review of previous researches in the study of the effects that measurement errors have on the properties of the process capability indexes and an original contribution is made by analyzing the effect of systematic errors on the properties of the estimator of the capability index.

Palavras-chave : Process capability studies; Systematic measurement error; Relative bias.

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