Vice-versa, it can also request services from its environment if it needs
them for its own functionality. It is therefore important to know the system ??™ s
environment.
There is manifold interplay between the system and its environment. We therefore
have to analyze the type of embedding to ensure that the fi nished system will
integrate into the environment nicely without negative surprises later on.
The system context model represents the direct environment of the system
and gives initial information about the communication fl owing from and to the
system. The external interaction partners are the system actors. The communication
itself is described by information fl ows.
The system context diagram is not a predefi ned SysML or UML diagram, but
part of the SYSMOD approach. It is formally and correctly composed of standard
elements and can be modeled using any SysML/UML tool. You would select the
block defi nition diagram or the internal block diagram here as your standard diagram
form. 8
Figure 2.11 shows the details of the approach step model system context from
Figure 2.
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