Enterprise Architecture Guide
Frameworks, modeling, tooling, and governance for enterprise architects
This guide covers the full enterprise architecture discipline — from foundational frameworks and modeling standards to tooling, governance, and transformation planning. Whether you are new to EA or looking to deepen your practice, start here.
What Is Enterprise Architecture?
Enterprise architecture (EA) is a discipline that aligns an organisation's strategy, business operations, information systems and technology infrastructure. It provides a structured framework for understanding how the enterprise works today, where it needs to go, and how to manage the transition. EA frameworks like TOGAF and modeling languages like ArchiMate give architects the tools to make this work consistent, communicable and governable.
EA Frameworks: TOGAF & ArchiMate
TOGAF provides the process framework — the Architecture Development Method (ADM) — for creating and governing architecture. ArchiMate provides the notation for modeling the architecture content within each ADM phase. Together they form the industry-standard combination for enterprise architecture practice.
Architecture Modeling with Sparx EA
Sparx Enterprise Architect (Sparx EA) is the most widely used tool for enterprise architecture modeling. It natively supports ArchiMate 3.x, UML, BPMN, SysML and TOGAF. A centralised SQL or cloud repository enables concurrent team access, package-level governance, and automated reporting.
Capability Mapping & Application Portfolio
Business capability mapping is the foundation of effective EA practice. Capabilities describe what the organisation must be able to do, independent of current structure or systems. Linking capabilities to applications enables portfolio rationalisation, gap analysis, and investment planning.
Digital Transformation & Roadmaps
Enterprise architecture supports digital transformation by modeling baseline and target architectures, defining transition plateaus, and sequencing work packages. ArchiMate's Implementation and Migration layer enables architects to produce traceable roadmaps from strategy through to implementation.
Architecture Governance
Governance ensures architecture decisions are consistent, traceable, and aligned to organisational standards. It includes architecture review boards, modeling standards, lifecycle management, and compliance checking. Sparx EA supports governance through package security, validation rules and automated reporting.
Enterprise Architecture Articles
Frequently Asked Questions
What is enterprise architecture?
Enterprise architecture is a discipline that aligns strategy, business processes, information systems, and technology. It uses frameworks like TOGAF and modeling languages like ArchiMate to create a structured, traceable view of how the organisation operates and how it must change.
What tools are used for enterprise architecture?
The most widely used enterprise architecture tool is Sparx Enterprise Architect, which supports ArchiMate, UML, BPMN and SysML. Other tools include Archi (free, ArchiMate-only), BiZZdesign Enterprise Studio, LeanIX, and Orbus iServer.
What is the difference between TOGAF and ArchiMate?
TOGAF is a process framework — it defines how to develop, govern and manage enterprise architecture through the ADM. ArchiMate is a modeling language — it defines how to represent and communicate architecture content. They are designed to work together: TOGAF guides the process, ArchiMate provides the notation.
Enterprise Architecture Training
NILUS delivers expert ArchiMate, TOGAF, Sparx EA and BPMN training — on-site or remote, in English or French.