FIT Rate Calculations for FMEDA in ISO 26262

FMEDA is one of the essential safety analysis techniques for hardware design. Failure rates or FIT rates are a significant input for this analysis. This paper will look at various methods of calculating FIT rates with examples.

Safety features in today's vehicles are more important than ever before. The newer trends of connected and autonomous vehicles' shared mobility and electrification demand car electronics to be safer and more reliable. Functional safety is a part of the overall safety of a product, which focuses on getting the correct input, processing, and delivering the correct output. In terms of risk, the system should avoid unreasonable risk due to the malfunctioning behavior of E/E systems.

Initially, the automotive industry followed the IEC 61508 standards for functional safety. However, since the automotive industry is very complex and with the distributed development approach, the need was felt to have a dedicated standard for automotive functional safety. The first edition of ISO 26262 was published in 2011. The standard was later updated to address additional concerns regarding motorcycles, Trucks and Buses, and semiconductor device development. Part 11 of ISO 26262 2nd edition focuses on semiconductor IP development in detail. Check out the whitepaper for more information.  

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