Taxonomy to Unify Fault Tolerance Regimes for Automotive Systems: Defining Fail-Operational, Fail-Degraded, and Fail-Safe

This paper presents a taxonomy that allows defining the fault tolerance regimes fail-operational, fail-degraded, and fail-safe in context of automotive systems. Fault such as these are widely used recent publications related to automated driving, yet without definitions. largely holds true for safety standards, too. We show defined scientific domain partially ambiguous well taxonomically unrelated. The presented is based on terminology stemming from ISO 26262 systems engineering. It uses four criteria distinguish regimes. In addition fail-safe, core consists operational fail-unsafe. These terms supported by definitions available performance, nominal functionality, concise definition safe state. For verification, we means two examples can be applied hierarchical different complexity.