Architecture Modeling - SPES 2020

Architecture Modeling
Figure 5.2: Operational Perspective – Abstraction Level 1 – Top Level
Operational and Functional Perspective The intention of the operational perspective (as introduced
in Section 3.2.1) is to model the interaction of different actors with the system under
development using (operational) activities. The top level component of the operational perspective
of the Aircraft Level is depicted in Figure 5.2. It shows a component systemcontext
which contains the system under development, that is Aircraft here, and all actors that interact
with this system. In this simple example we have just one actor namely the Pilot.
This actor interacts with the system via different ports e.g. to control the thrust-reverser or the
landing gear.
Figure 5.3: Operational Perspective – Aircraft Level – Aircraft
Having a closer look into the Aircraft system in Figure 5.3 shows a main activity named
DecelerateOnGround. This complex activity offers different ways to decelerate the aircraft
on the ground. This is expressed by a further decomposition of this activity into subactivities
shown in Figure 5.4.
First, there is the need to extend the landing gear before landing which is represented
by the activity ControlLandingGear. Furthermore, the forward thrust need to be removed
to reduce speed before touching down (RemoveForwardThrust). The activities
that model the actual braking process are the primary and secondary stopping force.
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