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Executive summary
M&A integration creates immediate architecture problems: overlapping applications, inconsistent domain definitions, duplicate capabilities, and coupled dependencies that can slow synergy capture. ArchiMate’s ability to represent relationships among business domains and across architecture layers makes it a practical language for producing a single integration narrative: baseline states for “Company A” and “Company B,” a target operating model and target application portfolio, and a migration roadmap with defined plateaus. ArchiMate training
A disciplined approach pairs decision traceability (why you keep/retire systems) with governance controls (architecture boards, compliance reviews) so integration choices remain transparent and defensible. integration architecture diagram
- Baseline modeling: capabilities and applications per company
- Target state design: operating model and platform strategy
- Roadmaps: plateaus, work packages, dependency sequencing
- Governance and decision traceability (ADR + board review)
- ArchiMate 3.2 standard framing.
- ArchiMate reference cards.
- TOGAF Architecture Board.
- TOGAF compliance review process.
- ADR practice.
M&A integration timeline with ArchiMate
Mergers and acquisitions create the highest-stakes architecture decisions an organization faces. Two technology portfolios must become one, usually under intense time pressure. ArchiMate provides the structured analysis that prevents integration decisions from being driven by politics rather than evidence. ArchiMate tutorial for enterprise architects
Week 1–4: Due diligence inventory. Build a rapid inventory of both organizations' architecture. Model Application Components with Source (Company A / Company B), Annual Cost, User Count, and Technology Stack. The goal is not a perfect model — it is a good-enough inventory that enables comparison. Speed matters more than completeness at this stage.
Week 5–8: Capability mapping. Map both application portfolios to a shared capability model. This reveals where capabilities are duplicated (both companies have CRM), where they are complementary (Company A has advanced analytics that Company B lacks), and where they are unique (Company B has a regulatory reporting system specific to their market).
Week 9–16: Overlap analysis and decisions. For each duplicated capability, analyze the competing applications on fitness, cost, user satisfaction, and migration complexity. Build Application Cooperation views showing integration dependencies — retiring an application may require migrating not just its users but also every system that integrates with it. Each rationalization decision is modeled as an Assessment linked to the affected components.
Week 17–30: Integration execution. Build Migration views with Plateaus. The first plateau is "Day 1" — the minimum viable integration state where both organizations can operate. Subsequent plateaus consolidate duplicate systems progressively. Each plateau must be a viable operational state.
Week 31+: Optimization. After the major integration is complete, optimize the combined portfolio. Identify further consolidation opportunities, retire temporary integration bridges, and align the combined architecture to the merged organization's strategy.
Practical ArchiMate modeling guidance
Effective ArchiMate modeling requires discipline in three areas: element selection (choosing the right element type for each concept), relationship precision (using typed relationships instead of generic associations), and view composition (building viewpoint-specific diagrams with 15-20 elements maximum). These three disciplines determine whether an ArchiMate model communicates clearly or creates confusion. ArchiMate layers explained
Start each modeling effort by identifying the stakeholder question the view must answer. "Which applications support customer onboarding?" drives an Application Cooperation view. "What infrastructure is end-of-life?" drives a Technology Usage view with lifecycle tagged values. "How does this transformation affect the business?" drives a Layered view with migration plateaus. The question determines the viewpoint, the viewpoint determines the elements, and the elements determine the relationships.
Applying these patterns in practice
The value of ArchiMate modeling is realized not through comprehensive coverage of every element type, but through disciplined application of a few core patterns that answer recurring stakeholder questions. Three patterns account for the majority of architecture communication needs. ArchiMate relationship types
The Layered View pattern shows how business processes depend on applications, and how applications depend on infrastructure. Build this view by placing Business Processes at the top, Application Components in the middle, and Technology Nodes at the bottom. Connect them with Serving and Realization relationships. This single view demonstrates cross-layer traceability — when a server is decommissioned, trace upward to see which applications and business processes are affected.
The Cooperation View pattern shows how application components interact through interfaces and data flows. Place the core application in the center and its integration partners around it, connected by Flow relationships labeled with the data exchanged. This view reveals integration dependencies that are otherwise buried in technical documentation.
The Motivation View pattern connects strategic goals to architecture decisions. Stakeholder concerns drive Goals, Goals are realized by Outcomes, Outcomes are enabled by Capabilities, and Capabilities are realized by Application Components. This chain answers the question executives always ask: "Why are we building this?"
If you'd like hands-on training tailored to your team (Sparx Enterprise Architect, ArchiMate, TOGAF, BPMN, SysML, Apache Kafka, or the Archi tool), you can reach us via our contact page.
Frequently Asked Questions
How is integration architecture modeled in ArchiMate?
Integration architecture in ArchiMate is modeled using Application Components (the systems being integrated), Application Services (the capabilities exposed), Application Interfaces (the integration endpoints), and Serving relationships showing data flows. Technology interfaces model the underlying protocols and middleware.
What is the difference between API integration and event-driven integration?
API integration uses synchronous request-response patterns where a consumer calls a provider and waits for a response. Event-driven integration uses asynchronous message publishing where producers emit events that consumers subscribe to — decoupling systems and improving resilience.
How does ArchiMate model middleware and ESB?
Middleware and ESB platforms appear in ArchiMate as Application Components in the Application layer that expose Integration Services. They aggregate connections from multiple source and target systems, shown through Serving and Association relationships to all connected applications.