All functions in the electrical system must behave in a predictable and for the customer acceptable manner even outside the normal supply voltage limits. FSC C is regarded as minimum level in the voltage range -14V to +35V within conditions given in tests if nothing else is stated. The HW and/or SW shall during those conditions never be put into a permanent inaccessible state.Performance acceptance criteria have to be stated, irrespective of if it is within or outside of specified tolerance. This implicates both derating (related to voltage and temperature) but also customer perception (visual, haptic, thermal) and time sequence must be defined if applicable.No unwanted operation of the DUT is allowed, i.e. for the customer all kind of non-acceptable or unpredictable behaviour.The integrity of the non-volatile memories must always be ensured.Permanent reduction (exception class E) in functionality and performance is not allowed.The time sequences of functional statuses during test must be specified.The order of classification spans from E to A where A is the most stringent.Note! ISO 16750 FSC not to be mixed up with abbreviation for ISO 26262 Functional Safety Concept.