Enterprise Architecture
The handbook's final Part zooms out beyond any single product to the organizational level — how business goals, applications, technology, and information are architected together across an entire enterprise, and the governance practices that keep dozens or hundreds of individual systems (each potentially built using everything covered in Parts I–VIII) coherent rather than chaotic.
Start Part IX — 9.1Business Architecture
The layer that describes an organization's actual structure — before any technology decision is made.
9.2Application Architecture
Zooming out from a single system's internal architecture (7.10) to how many systems fit together across an enterprise.
9.3Technology Architecture
The infrastructure and platform standards underneath every application in the enterprise's portfolio.
9.4Information Architecture
Not to be confused with a single site's navigation structure — this is data ownership across an entire enterprise.
9.5Capability Mapping & Governance
Knowing what the organization can do, independent of the specific system currently doing it.
9.6Architecture Decision Records (ADRs)
A small, cheap habit that prevents an enormous, recurring waste of time: relitigating decisions nobody remembers the reasoning behind.
9.7Architecture Reviews & Governance
The checkpoint where a proposed system is checked against enterprise standards before it's built, not after.
9.8Digital Transformation & Enterprise Integration
The handbook's closing chapter — how everything covered across all nine Parts comes together at the scale of an entire organization.