FTTI methodology in SOTIF world
These days, one interesting topic about FTTI attracts me and that is why this article coming out.
How to set FTTI in ADAS/ADS system, due to many surrounding ADS coming out ?
To answer this problems, we have to considering from following 3 points
First: deviation between functional safety and SOTIF
functional safety assume intended functionality can be accomplished as designed, and only random hardware failure and systematic failure will lead to unreasonable EErisks.
SOTIF focus on all factors might leading to intended functionality operates deviatedfrom designed, which can be divided 4 potential sub-groups:
ZONE1:Not hazardous, known
ZONE2:Hazardous, known
ZONE3:Hazardous, unknown
ZONE4:Not hazardous, unknown
Andwe have total Level0~Level5 of automation definition, combine them and then intofollowing columns:
FIG1:example of SOTIF Zone
Second:FTTI in functional safety
we can see FTTI from functional safety in ISO 26262-2018 Chapter1:
Third:FTTI for SOTIF
Thanks for your reading.
Samuel WENG
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