What does it mean when your measurement is just within, or just outside of limits? Dealing with risks due to measurement errors and their implication on safety

Stefan Mozar, Wen-Chung Kao

研究成果: 書貢獻/報告類型會議論文篇章

摘要

In safety engineering there are occasions where a reading indicates that the result over the limit. For example if a measurement result is 5.51V, and the limit is 5.50V. Is such a reading outside the limit? Does a safety problem exist? The answer is not a simple yes or no. A number of considerations need to be made, for example how critical is this measurement for product safety? In other words is there a safety risk? To answer such a question we need to understand the effect of tolerances. This includes the tolerance of the measuring instrument used, and of the circuit being tested. First measurement errors are briefly reviewed, followed by a brief discussion of the statistical significance. Then statistical techniques and risk management are used to determine if the reading is out of tolerance and what is the likelihood of a safety issue. This may seem an 'overkill', but we consistently hear about consumer goods catching fire. One cell phone is banned by all airlines as the chances that it will catch fire is considered too high to put passengers' lives at risk. Safety engineering does not make adequate use of statistical analysis to understand and prevent unsafe conditions.

原文英語
主出版物標題ISPCE 2017 - 2017 IEEE Symposium on Product Compliance Engineering, Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781509052486
DOIs
出版狀態已發佈 - 2017 五月 26
事件14th Annual IEEE Symposium on Product Compliance Engineering, ISPCE 2017 - San Jose, 美国
持續時間: 2017 五月 82017 五月 10

出版系列

名字ISPCE 2017 - 2017 IEEE Symposium on Product Compliance Engineering, Proceedings

其他

其他14th Annual IEEE Symposium on Product Compliance Engineering, ISPCE 2017
國家/地區美国
城市San Jose
期間2017/05/082017/05/10

ASJC Scopus subject areas

  • 安全、風險、可靠性和品質
  • 電氣與電子工程

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