  Modeling the logical architecture is an often underestimated development step
to gain an early insight into the fundamental functional properties of an
automotive system. An architectural description supports developers in making
design decisions for further development steps like the refinement towards a
software architecture or the partition of logical functions on ECUs and buses.
However, due to the large size and complexity of the system and hence the
logical architecture, a good notation, method, and tooling is necessary. In
this paper, we show how the logical architectures can be modeled succinctly as
function nets using a SysML-based notation. The usefulness for developers is
increased by comprehensible views on the complete model to describe automotive
features in a self contained way including their variants, modes, and related
scenarios.
