  An emerging service is moving the known aviation sector in terms of
technology, paradigms, and key players - the Urban Air Mobility. The reason:
new developments in non-aviation industries are driving technological progress
in aviation. For instance electrical motors, modern sensor technologies and
better energy storage expand the possibilities and enable novel vehicle
concepts which require also novel system architectures for flight control
systems. Their development is governed by aviation authority and industry
recognized standards, guidelines and recommended practices. Comprehensive
methods for Model-Based Systems Engineering exist which address these guidance
materials but their setup and their application can be quite
resource-demanding. Especially the new and rather small key players - start-ups
and development teams in an educational environment - can be overwhelmed to
setup such development processes. For these clients, the authors propose a
custom workflow for the development of system architectures. It shall ensure
development rigor, quality and consistency. The authors show how the custom
workflow has been established based on the ARP4754A and its level of compliance
to the standard's process objectives. Based on automation of life cycle
activities, manual effort can be reduced to allow the application even in small
teams. The custom workflow's activities are explained and demonstrated within a
case study of an Experimental Autopilot system architecture.
