Concerns: Stability, security, dependencies, costs of the infrastructure
Purpose: Designing
Scope: Single layer/Multiple aspect
The technology viewpoint contains the software and hardware technology elements supporting the Application Layer, such as physical devices, networks, or system software (e.g., operating systems, databases, and middleware).
Concerns: Dependencies, performance, scalability
Purpose: Designing
Scope: Multiple layer/Multiple aspect
The technology usage viewpoint shows how applications are supported by the software and hardware technology: the technology services are delivered by the devices; system software and networks are provided to the applications. This viewpoint plays an important role in the analysis of performance and scalability, since it relates the physical infrastructure to the logical world of applications. It is very useful in determining the performance and quality requirements on the infrastructure based on the demands of the various applications that use it.
Concerns: Structure and dependencies of the used data and information, consistency and completeness
Purpose: Designing
Scope: Multiple layer/Single aspect
The information structure viewpoint is comparable to the traditional information models created in the development of almost any information system. It shows the structure of the information used in the enterprise or in a specific business process or application, in terms of data types or (object-oriented) class structures. Furthermore, it may show how the information at the business level is represented at the application level in the form of the data structures used there, and how these are then mapped onto the underlying technology infrastructure; e.g., by means of a database schema.