ISO 21448 is the international standard — known as SOTIF, Safety of the Intended Functionality — that addresses a critical and often overlooked dimension of vehicle safety: the risks that arise not from system failures, but from the limitations and uncertainties of systems that are working exactly as designed. Published in 2022, ISO 21448 establishes the requirements that organisations must meet to ensure that advanced driver assistance and automated driving systems behave safely across the full range of conditions they may encounter in the real world.

As ADAS technologies move from lane-keeping assistants and automatic emergency braking to increasingly complex automated functions, the industry has recognised that traditional safety approaches are not sufficient on their own. ISO 21448 fills that gap, providing a structured framework to identify, evaluate, and mitigate the risks that emerge when a system's intended behaviour leads to unsafe outcomes — a challenge that is uniquely relevant to perception-based and AI-driven systems.

ISO 21448 defines the requirements for managing safety risks that originate from the intended functionality of a system, rather than from hardware or software faults. Its scope covers the full development lifecycle of systems where sensors, perception algorithms, and automated decision-making play a central role — from the earliest stages of concept definition through to validation and real-world deployment.

The standard recognises that a system can function correctly in the technical sense and still produce unsafe outcomes when exposed to conditions outside its design assumptions — unexpected weather, unusual road markings, edge-case traffic scenarios, or sensor limitations under specific lighting conditions. SOTIF addresses precisely this category of risk, establishing what must be done to understand, bound, and reduce it to an acceptable level throughout the product lifecycle.

The ADAS and automated driving market is one of the fastest-growing segments in the automotive industry, and it is also one of the most demanding in terms of safety evidence. OEMs developing next-generation platforms expect their suppliers to demonstrate not only that their systems do not fail, but that they behave safely across a wide and unpredictable range of real-world scenarios. ISO 21448 is the recognised framework for providing that evidence.

For organisations supplying perception systems, sensor fusion technologies, or automated functions, the absence of a process aligned with ISO 21448 creates a direct barrier to entry. Customers in this space are increasingly requiring documented conformance as part of their supplier qualification and project award processes. Not being able to demonstrate alignment with the standard means being unable to compete for the programmes where future growth is concentrated.

Beyond market access, the consequences of deploying a system with unaddressed SOTIF risks are significant. Real-world incidents involving ADAS systems have drawn intense regulatory and media scrutiny, and the liability exposure for organisations that cannot demonstrate a rigorous safety process is considerable. ISO 21448 provides the structure to manage that exposure proactively, before products reach the field.

Access to ADAS and automated driving programmes: Conformance with ISO 21448 is becoming a prerequisite for participation in the most strategically significant development programmes in the industry, where OEMs require suppliers to demonstrate a mature and structured approach to SOTIF risk.

Reduced exposure to field incidents and liability: A process aligned with ISO 21448 provides documented evidence that safety risks arising from intended system behaviour have been systematically identified and addressed — protecting the organisation in the event of real-world incidents or regulatory investigation.

Stronger positioning as a technology partner: In a market where trust is built on safety evidence, demonstrating ISO 21448 alignment signals to customers that your organisation understands the full safety picture — not just traditional failure modes, but the more complex risks of perception and automation.

Alignment with the direction of the industry: Regulatory frameworks in key markets — including the UNECE — are increasingly referencing SOTIF principles as part of type approval requirements for automated vehicles. Implementing ISO 21448 now positions your organisation ahead of requirements that are already being formalised across Europe, Asia, and North America.