Which phase of the ADM focuses specifically on Information Systems Architectures?

The phase of the Architecture Development Method (ADM) that specifically focuses on Information Systems Architectures is Phase C. During this phase, the emphasis is placed on the development and detailing of the architectural approach for the information systems within the enterprise. This includes the analysis of essential business processes and the associated information flows.

In Phase C, architects work to define and outline data architectures—which involve data models that represent the structure of the enterprise’s data—and application architectures, which are concerned with the applications that support the business processes and the interactions between them. This phase ensures that the information systems are aligned with business goals and adequately support the requirements identified in earlier ADM phases.

The understanding gained from this phase lays the groundwork for subsequent phases where detailed design and implementation can take place, ensuring that all information systems are well-integrated and effectively contribute to the overarching enterprise architecture.