When a measured value of a property of a material or object differs from the upper or lower specification limit (actual or 'true' value) by the expanded measurement uncertainty or more, there is the clear decision on the material conformity or nonconformity - 'white' or 'black'. In the interval from the measured value to the specification limit, covered by the expanded measurement uncertainty ('grey zone'), risks of false decisions on conformity increase. Several kinds of the risks, named 'shades of grey', should be taken into account. For a multicomponent material there are four kinds of particular risks for each property value of the material (e.g. component concentration or content), and four kinds of total risks related to the material as a whole. Therefore, for n > 1 properties under control for the material conformity assessment one can distinguish 4(n +1) kinds of risks of false decisions - shades of grey.

How many shades of grey are in conformity assessment due to measurement uncertainty? / Kuselman, Ilya; Pennecchi, Francesca R; da Silva, Ricardo J N B; Brynn Hibbert, D. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 1420(2019), p. 012001. [10.1088/1742-6596/1420/1/012001]

How many shades of grey are in conformity assessment due to measurement uncertainty?

Pennecchi, Francesca R;
2019

Abstract

When a measured value of a property of a material or object differs from the upper or lower specification limit (actual or 'true' value) by the expanded measurement uncertainty or more, there is the clear decision on the material conformity or nonconformity - 'white' or 'black'. In the interval from the measured value to the specification limit, covered by the expanded measurement uncertainty ('grey zone'), risks of false decisions on conformity increase. Several kinds of the risks, named 'shades of grey', should be taken into account. For a multicomponent material there are four kinds of particular risks for each property value of the material (e.g. component concentration or content), and four kinds of total risks related to the material as a whole. Therefore, for n > 1 properties under control for the material conformity assessment one can distinguish 4(n +1) kinds of risks of false decisions - shades of grey.
File in questo prodotto:
File Dimensione Formato  
Kuselman_2019_J._Phys.__Conf._Ser._1420_012001.pdf

accesso aperto

Descrizione: Articolo principale
Tipologia: Versione editoriale
Licenza: Creative Commons
Dimensione 502.88 kB
Formato Adobe PDF
502.88 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11696/61207
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact