What are the three levels of granularity in the Architecture Landscape?

The three levels of granularity in the Architecture Landscape are characterized as broad, summary architectures and narrow and detailed architectures. This classification helps in understanding the depth and detail required at different stages of architectural development.

Broad, summary architectures provide a high-level view that sets the context for the overall enterprise architecture. They serve as a foundation for understanding how different components of the architecture interact at a macro level, allowing stakeholders to grasp the enterprise's direction and strategic intent.

In contrast, narrow and detailed architectures delve into the specifics of certain aspects of the enterprise architecture. This level includes more technical details and is focused on particular areas that require closer examination. It allows architects and stakeholders to analyze, design, implement, and manage the specific requirements and functionalities of systems involved.

This duality supports the idea that enterprise architecture should be able to cater to various audiences with different needs, from high-level executives needing a broad overview to technical teams that require detailed specifications to effectively carry out implementations. The cohesiveness of these levels of granularity ensures that all stakeholders have access to the appropriate level of detail necessary to fulfill their roles within the architecture management process.