Abstract
Engineering safe software for the automotive domain is challenging due to ever more complex systems. The safety standard ISO 26262 provides car manufactures in this effort with a guideline. In particular, the standard describes a hazard analysis and risk assessment for automotive systems to determine the necessary safety measures to be engineered for a specific feature. However, the standard contains ambiguous descriptions. We propose a structured method for hazard analysis and risk assessment based on a requirements engineering method that incorporates the problem frame approach to resolve these ambiguities. The concepts and terminology of the standard concepts and its terminology are represented by a UML profile that contains respective stereotypes. The UML model allows precise validation of several consistency constraints expressed in OCL. These artifacts are integrated in a structured method for safety engineering compliant with ISO 26262. We illustrate the application of our method with the example of an electronic steering column lock system.
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