A risk index to evaluate the criticality of a product defectiveness

Translated title of the contribution: [Autom. eng. transl.] A risk index to evaluate the criticality of a product defectiveness

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose a risk index naturally suitable in quality-control framework characterized by data often collected on ordinal scale, to measure the risk of failure of a product. A so-called Severity Index is defined on the basis of the relative frequencies of the ordinal variables. We examine the distribution and the statistical properties of its estimator. We apply the index to real data concerning the severity and the occurrence of defectiveness of the products of a multinational corporation manufacturer. Our index may be employed to communicate the level of risk, to compare among different risks and to identify interventions in the production system.
Translated title of the contribution[Autom. eng. transl.] A risk index to evaluate the criticality of a product defectiveness
Original languageItalian
Title of host publicationSIS 2017 Statistics and Data Science: new challenges, new generations
Pages399-403
Number of pages5
Publication statusPublished - 2017
EventSIS 2017 Statistics and Data Science: new challenges, new generations - FIRENZE -- ITA
Duration: 28 Jun 201730 Jun 2017

Conference

ConferenceSIS 2017 Statistics and Data Science: new challenges, new generations
CityFIRENZE -- ITA
Period28/6/1730/6/17

Keywords

  • categorical variables
  • failure modes and effects analysis
  • risk index

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