uThe user or operator
is part of the system
uThe system goals are
superordinate
lKnow the purpose of
the system.
uSystems are usually
hierarchical
uBoth systems and
components have inputs and outputs
uKnow the structure
of the system
uDeficiencies in
system performance is the result of deficiencies
of one or more components.
uThe system is part
of the larger environment