SOTIF - Safety Of the Intended Functionality - ISO 21448

Compare ISO 21448 and ISO 26262, highlighting safety of the intended functionality alongside functional safety. Learn how integration provides comprehensive risk management and lifecycle processes for autonomous vehicle systems.

Explain the definition and scope of Sotf and its application to modern vehicle systems, including performance limits and environmental effects. Identify hazards, assess risk, and implement mitigation and validation.

Identify hazards and assess risks for functionalities via functional analysis, OD boundaries, and scenarios. Document triggering conditions, evaluate severity and controllability, and define risk acceptance criteria for safe vehicle systems.

Identify functional insufficiencies and triggering conditions in automated systems, and apply analysis methods such as requirement analysis, boundary value analysis, equivalence class analysis, and validation to mitigate misuse.

Apply functional modifications to reduce risks under SOTIF, using system modifications, functional restrictions, and authority handover to address reasonably foreseeable misuse and maintain safe vehicle operation.

Define the verification and validation strategy to ensure functional and safety requirements, assess residual risks, and validate performance across the operational design domain through integration testing and simulation.

Evaluate known scenarios to validate sensing, planning, actuation, and system integration under the operational design domain, identifying performance insufficiencies and minimizing residual risk to meet SOTIF.

Assess unknown scenarios to ensure automated systems stay safe under unpredictable conditions within SOTIF. Apply residual risk evaluation with robustness validation, architecture checks, scenario-based and fleet testing, and continuous monitoring.

Explore how to validate extremely low acceptance criteria by focusing on relevant hazardous behavior, deriving a risk-based target (RB) through incidents, scenarios, controllability, and severity, with practical calculation examples.