Information Technology Reference
In-Depth Information
1.
Definition
of a concrete domain specific model, which could be a func-
tional requirements model for a certain system under development.
2.
Annotation
(direct or indirect) of the concrete model, based on formal
domain ontologies: Thus, it is assured that requirements have a meaning
in the sense of the respective domain ontologies.
3.
Reasoning
about implications within and from other domains: This could
be an impact on safety and vice versa, due to a given definition of a system
under development and associated safety measures.
4.
Feedback
of consequences from another development stream for the very
own development activities: These could be concrete safety measures and
related activities which either impact the requirements model or concur-
rent implementation activities.
3
Example Application and Prototype Toolchain
To further illustrate the proposed methodology, the development of an exem-
plified assistance and automation system from the automotive domain will be
sketched as depicted in Fig. 2 and Fig. 3. Both the figure and the following
textual description refine the four steps described in Sect. 2.3 - the enumer-
ation of the subsequent text references the numbers in Fig. 3. This example
application refers to a lane departure warning system (LDWS) which alerts
thedriverassoonasthevehiclebeginstomoveoutofitslane[5].
Fig. 2. Vehicle equipped with a lane departure warning system (LDWS) almost
colliding with lateral tra
c while driving at 120 km/h on a highway during daytime
1.
Requirements model:
The functional
requirements
of the system
compo-
nent
(the LDWS) are formulated, e.g. the driver has to be alerted when
the vehicle is leaving the trac lane.
2.
Annotation:
The system component is annotated with domain attributes
concerning the
operations
to be performed, the
environment
in which
the system will be used, and the types of
accidents
which may occur
due to malfunctions of the component. Regarding the LDWS, an exam-
ple operation would be the continuous observation of the vehicle's lateral
position within the trac lane. The environmental conditions refer to
driving situations on a normally frequented highway with a dedicated
