e., simple names, suffi cient? Or should they be detailed using the representation
relationship? Or do we have to use the SysML extension of the information fl ow
to model objects directly? In case of doubt we model less for the time being.
2.3.3 Identify System Interaction Points
Identifying system interaction points is shown in Table 2.8 .
You know the actors who interact with our system from the previous results.
This is modeled in the system context diagram by a relationship from an actor to
60 CHAPTER 2 The Pragmatic SYSMOD Approach
the system. You also know several pieces of information that will be exchanged.
But how does this information get in and out of the system?
There is a system interaction point where the solid line from an actor hits
the system. This is a point over which the system will communicate with its
environment.
Imagine your system is a black box. This box has to provide interaction points for
the actors to be able to communicate with the system. These can be connections
for external systems or special clients, Web access for users, switches, displays, and
so on ( Figure 2.
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