Safety of Intended Functionality (SOTIF) Analysis

Functional safety standards, such as ISO 26262, are critical for ensuring that the complex electronics in today’s driver-operated cars are reliably delivering consistent performance over time, without system failures. But, with the emergence of autonomous vehicles, engineers face additional safety challenges. What if components ― sensors, for example ― are working as designed, but are falling short under real-world conditions, creating hazardous conditions?

A new standard, ISO/PAS 21448 (“Road vehicles — Safety of the intended functionality” (SOTIF)), identifies and addresses performance shortfalls in autonomous vehicle systems that occur even in the absence of a system failure. The SOTIF standard raises the safety bar by ensuring that all components (e.g., sensors, perception algorithms) are not only working as designed, but also appropriately designed to perform their intended function under all conditions.

Ansys is uniquely qualified to help automotive companies understand and fulfill the requirements of ISO 21448. Engineering teams can now simultaneously meet the existing functional safety requirements of ISO 26262 and the ISO 21448 SOTIF standard using Ansys software. While SOTIF analysis can be performed as a separate, stand-alone activity, integrating it with functional safety analysis allows development teams to make common use of architecture models, vehicle-level malfunctioning behavior analysis and hazardous event assessments. This eliminates redundancies and ensures consistency among all results.

Ansys offers an array of powerful simulation solutions that are linked together on one technology platform. This enables diverse teams — working to meet functional safety and SOTIF standards across embedded software, electronics, perception and other areas — to  collaborate easily and more seamlessly. By sharing the same data and a common toolkit, they can hand off iterative design tasks with the highest degree of speed and efficiency.

  • How Safety Analysis Tools Can Perform SOTIF-Related Analysis of E/E Systems

  • Going Beyond Functional Safety: SOTIF Analysis of Automotive Systems