FTTI - Fault Tolerant Time Interval
What is FTTI? FTTI - Fault Tolerant Time Interval FTTI time is one of the several Safety Relevant time intervals (others being FHTI, FRTI, FDTI) FTTI time is minimum time-span from the occurrence of a fault in an item to a possible occurrence of a hazardous event, if the safety mechanisms are not activated. FTTI is a relevant attribute for Safety Goals derived from hazards caused by malfunctioning behavior of an item. FTTI time is only defined at the Item level Example Safety Goal : Avoid unintended vehicle longitudinal acceleration ASIL : B FTTI : 500 ms Vocabulary Fault : an abnormal condition that can cause an element or item to fail. Item ...