SME TECoSA: Model-based Risk Assessment and Safety analysis (MBRASA)Method for edge-based CPS

Purpose and goal:

Current functional safety standards (e.g. ISO26262) focus on single individuals (vehicles, machines etc.). Given the trends of connectivity and autonomy, a current challenge is to conduct risk assessments to encompass multiple vehicles or machines where parts of the end-to-end function reside in the edge and where communication is done wirelessly.

Based on such extended systems definition, the hazard and risk analysis need to be extrapolated to ensure trustworthiness for the extended scope. In the project, "MBRASA" was developed to take care of a larger context and complexity. Expected results and effects:

The project resulted in an approach to a new risk assessment method, MBRASA, from system level to edge-based CPS, extrapolated from existing standard (eg. ISO26262) and communicated in a workshop with stakeholder(s). The usefulness of MBRASA regarding reuse, certification, automation, roles and complexity regarding System of system were discussed at the Workshop arranged by SCSS.

A prototype model for "Platooning", plus a model describing our Industrial partner Einrides use case including a report with the method approach were created. Approach and implementation:

The project execution was divided into four work packages with model design, analysis of the safety aspects applied to the model and final method evaluation. The project created an approach to the method and a possible extension of the project could be to create safe-proof models where the method is verified, as well as to add cyber security aspects.