Enterprise Architecture and Systems Integration
Enterprise architecture (EA) provides a blueprint for organizational structure, processes, data, and technology, enabling alignment between business and IT. Frameworks like TOGAF (The Open Group Architecture Framework) and Zachman are essential. TOGAF's Architecture Development Method (ADM) is a cyclic process for developing and managing architecture. Candidates must know the four EA domains: business, data, application, and technology architecture. Systems integration involves connecting disparate systems to enable data flow and process automation. Key integration patterns include point-to-point, hub-and-spoke (message broker), service-oriented architecture (SOA), and microservices. A common trap is assuming that EA is only about technology; it must be driven by business strategy. Another trap is confusing integration patterns: for example, SOA uses loosely coupled services, while microservices are finer-grained and independently deployable. Also, be aware of the role of APIs and middleware in integration. A worked example: When integrating a new CRM with an ERP, a hub-and-spoke pattern via an enterprise service bus can reduce complexity compared to point-to-point connections. Rule of thumb: EA should be iterative and evolve with business needs; integration should favor loose coupling and standardization to enhance flexibility and reduce dependencies.