The ISO 26262 analysis that identifies hazardous events at the vehicle level and rates severity, exposure and controllability to determine ASILs and safety goals. It is done at the very start of development.
Japanese name: HARA(ハザード分析とリスクアセスメント)
HARA (hazard analysis and risk assessment) appears in 3 practice questions across 1 topic, including Automotive Semiconductors and Functional Safety.
Answer: A. Severity (S), exposure (E), controllability (C)
The ASIL is determined for each hazardous event by evaluating three factors: severity S, representing how serious the injuries are; exposure E, representing the frequency or duration of exposure to driving situations in which the hazard can occur; and controllability C, representing how likely the driver or others are to avoid the hazard. For example, sudden loss of braking at high speed has high severity and is hard to avoid, so it receives a high ASIL. Failure rate, diagnostic coverage and FTTI are quantities used after the ASIL is determined, to evaluate whether a design meets its requirements.
A safety goal is a top-level safety requirement defined at the vehicle level to prevent a hazardous event identified in HARA.
Which correctly describes a "safety goal" in ISO 26262?ISO 26262 is a functional safety standard for preventing hazards caused by random hardware failures and systematic failures, evaluating risk through HARA.
Which correctly describes the difference between the automo…As an Amazon Associate I earn from qualifying purchases.
ISO 26262 ASIL (Automotive Safety Integrity Level) Diagnostic coverage FTTI (fault tolerant time interval) Safety goal Risk assessment AEC-Q100 CAN bus ECU (electronic control unit) HAST (highly accelerated stress test)