Calculating System Failure Rates Using Field Return Data. Application of SAE-J3083 for Functional Safety and Beyond

Paper #:
  • 2018-01-1074

Published:
  • 2018-04-03
Abstract:
In early design activities (typically before the hardware is built), a reliability prediction is often required for the electronic components and systems in order to assess their future reliability and in many cases to meet customer specifications. Those specifications may include the allocated reliability for a particular electronic unit and in the cases of functional safety products to meet the ASIL (Automotive Safety and Integrity Level) requirement specified by the international functional safety standard ISO 26262. The standard allows for the use of “statistics based on field returns or tests” as a valid alternative to the handbook-based reliability prediction. However, there was no universal or well accepted methodology on how to use field return data to calculate the automotive electronic components failure rates until recently. This paper presents a newly developed SAE-J3083 standard “Reliability Prediction for Automotive Electronics Based on Field Return Data”, which covers the types of the data required, ways to collect it, and the methodology of how to process this data to calculate the failure rates and the expected reliability of the automotive electronics.
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