SOTIF Safety of Intended functionality -automotive ISO 21448

Explore safety of intended functionality (sotif) in automotive systems and its differences from iso 26262, guided by a certified functional safety expert with hands-on experience in body electronics.

Explains why automotive safety matters, focusing on protecting life and goodwill by avoiding recalls. Outlines why standards compliance and safety engineers are essential in the electronics-heavy automotive era.

Explore why SOTIF (ISO 21448) addresses hazards from complex system interactions and driver misuse beyond ISO 26262 functional safety, by identifying causal factors and safety constraint.

Apply a widely used safety analysis to automotive systems to study system and driver interactions, define accidents, identify unsafe control actions, and perform causal factor analyses under ISO 21448.

STPA using SOTIF introduces accident and hazard concepts, defines control structure, classifies control actions as safe or unsafe, analyzes causal factors, and derives safety requirements.

Apply sotif with stpa to step one, deriving inputs as function/operational descriptions and safety acceptance criteria, and outputs as safety requirements or modifications to the function within operational design domain.

Derive the accident model by defining accidents and hazards, link hazards to losses, and establish safety goals and umbrellas, then derive a control structure for autonomous driving.

derive unsafe control actions by analyzing each control action of actuators, such as accelerate, decelerate, steering, and headlamps, and link their effects to hazards within SOTIF step two.

Apply a state-machine approach to causal factor analysis in SOTIF, linking unsafe control events to hazards, safety goals, and escalation rules to prevent violations.

Explore the detailed process of causal factor analysis for SOTIF in automotive systems, linking safety goals, state machines, control actions, feedback, and driver interaction to prevent system limit violations.

Analyze causal factors of driver misuse to safeguard sotif safety goals and prevent hazards. Explore direct and indirect misuse cases, and propose driver readiness requirements and simulation-based validation.