Deriving Failure Rates in a Hierarchy of FMEAs

When analyzing the failure rate (or occurrence) of a system failure cause, the typical approach is to obtain an occurrence rating from the results of testing. However, in many cases, the occurrence of a system failure cause can be derived from a combination of occurrences of failure causes of the element (sub-system) failure mode coinciding with the system failure cause being assessed. This paper explores a few approaches for deriving occurrences from element FMEAs over a majority of cases before settling on a probabilistic approach that converts occurrences to worst-case failure rates to achieve the most fine-tuned combined occurrence rating. Finally, a “complex analysis” worksheet, where the logical combination of occurrences and failure rates is custom defined by the engineer, is introduced for handling special cases.

• Record URL:
  https://doi.org/10.4271/2017-01-0322
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19463936
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Abbas, Samer
  • Joyce, John
• Conference:
  • WCX™ 17: SAE World Congress Experience
  • Location: Detroit Michigan, United States
  • Date: 2017-4-4 to 2017-4-6
• Publication Date: 2017-3-28

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 296-299
• Serial:
  • SAE International Journal of Engines
  • Volume: 10
  • Issue Number: 2
  • Publisher: SAE International
  • ISSN: 1946-3936
  • EISSN: 1946-3944
  • Serial URL: https://www.sae.org/publications/collections/content/E-JOURNAL-03/

Subject/Index Terms

• TRT Terms: Failure analysis
• Identifier Terms: Failure Mode and Effects Analysis (FEMA)
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01633454
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2017-01-0322
• Files: TRIS, SAE
• Created Date: Apr 28 2017 10:44AM