--- name: enterprise-architecture description: Design and maintain enterprise architecture including application portfolio rationalization, target state architecture, technology roadmap, capability mapping, and architecture governance. Use when creating enterprise roadmaps, rationalizing application portfolios, establishing architecture standards, or performing technology assessments. Triggers on phrases like "enterprise architecture", "EA", "application portfolio", "target architecture", "technology roadmap", "capability map", "architecture review", "reference architecture", "technology stack", "vendor landscape", "architecture governance", "TOGAF", "as-is architecture", "to-be architecture", "architecture principles". --- # Enterprise Architecture Design and maintain enterprise architecture including application portfolio rationalization, target state architecture, technology roadmaps, and architecture governance. ## Workflow ### 1. Application Portfolio Management ``` APPLICATION PORTFOLIO RATIONALIZATION ═══════════════════════════════════════ CURRENT STATE INVENTORY: ═══════════════════════════════════════ Application Type Owner Users Annual Cost Business Critical Age Tech Debt ─────────────────────────────────────────────────────────────────────────────────────────── Salesforce SaaS Sales 250 $480K High 8yr Low Oracle ERP On-prem Finance 180 $350K Critical 12yr High SAP HCM Cloud HR 120 $220K High 5yr Medium SharePoint SaaS All 500 $85K Medium 6yr Low Custom CRM On-prem Sales 30 $180K Low 10yr High Tableau SaaS Analytics 45 $120K Medium 4yr Low Legacy billing On-prem Finance 15 $95K Low 18yr Very High Box.com SaaS All 300 $60K Low 3yr Low Dropbox SaaS All 200 $45K Low 3yr Low PORTFOLIO ANALYSIS: ═══════════════════════════════════════ Application Mapping Matrix (Business Capability vs Application): ═══════════════════════════════════════ Capability Salesforce Oracle SAP HCM SharePoint Custom Tableau Legacy Box Dropbox ───────────────────────────────────────────────────────────────────────────────────────────────── Sales Management Primary Secondary ── Financial Mgmt Primary HR Management Primary Document Mgmt Primary Primary Primary Analytics Primary Billing Secondary Primary RATIONALIZATION RECOMMENDATIONS: ═══════════════════════════════════════ Action Application Rationale Annual Savings ─────────────────────────────────────────────────────────────────────────────────────────── KEEP Salesforce Primary system, strong ROI $0 KEEP Oracle ERP Critical system; plan migration in 3yr $0 KEEP SAP HCM Good condition, modern platform $0 KEEP SharePoint Microsoft ecosystem, widely adopted $0 RETIRE Custom CRM Migrate users to Salesforce $180K KEEP Tableau Strong analytics platform $0 RETIRE Legacy billing Migrate to Oracle billing module $95K CONSOLIDATE Box + Dropbox Migrate all to OneDrive/SharePoint $105K ─────────────────────────────────────────────────────────────────────────────────────────── TOTAL SAVINGS: $380K/year ``` ### 2. Target Architecture ``` TARGET STATE ARCHITECTURE — 3-Year Roadmap ═══════════════════════════════════════ ARCHITECTURE PRINCIPLES: ═══════════════════════════════════════ 1. Cloud-first: New applications deploy to cloud by default 2. API-first: All services expose RESTful APIs 3. Buy-over-build: Prefer SaaS/COTS over custom development 4. Security-by-design: Security embedded in architecture, not bolted on 5. Data-driven: Decisions backed by data, analytics platform central 6. Resilience: Multi-AZ, multi-region for critical services 7. Composability: Modular, interchangeable components TARGET APPLICATION LAYER: ═══════════════════════════════════════ CRM: Salesforce (expand to service cloud, marketing cloud) ERP: Cloud ERP migration (NetSuite or Dynamics 365) HCM: SAP SuccessFactors (upgrade from SAP HCM) Collaboration: Microsoft 365 (SharePoint, Teams, OneDrive) Analytics: Power BI (consolidate from Tableau) Automation: Power Automate + custom APIs Integration: MuleSoft or Boomi (ESB/iPaaS) TARGET INFRASTRUCTURE LAYER: ═══════════════════════════════════════ Cloud: AWS (primary) + Azure (Microsoft workloads) Compute: Kubernetes (EKS) for containerized apps Data: Snowflake (warehouse) + S3 (data lake) Network: Transit Gateway + PrivateLink Security: AWS Security Hub + Sentinel + Purview INTEGRATION ARCHITECTURE: ═══════════════════════════════════════ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │ Salesforce │◄────│ Integration │────►│ Oracle ERP │ │ (CRM) │ │ Platform │ │ (ERP) │ └────────┬────────┘ └───────┬────────┘ └────────┬────────┘ │ │ │ ▼ ▼ ▼ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │ SAP HCM │ │ Data Platform │ │ Power BI │ │ (HCM) │ │ Snowflake + S3 │ │ (Analytics) │ └─────────────────┘ └─────────────────┘ └─────────────────┘ ``` ### 3. Technology Roadmap ``` 3-YEAR TECHNOLOGY ROADMAP ═══════════════════════════════════════ YEAR 1 (Foundation): ═══════════════════════════════════════ Q1-Q2: → Migrate Custom CRM users to Salesforce ($180K savings) → Consolidate Box + Dropbox to SharePoint ($105K savings) → Deploy integration platform (MuleSoft/Boomi) → Establish architecture review board (ARB) Q3-Q4: → Retire Legacy billing system (migrate to Oracle) → Deploy Snowflake data platform → Implement cloud landing zone (AWS) → Begin ERP migration assessment YEAR 2 (Transformation): ═══════════════════════════════════════ Q1-Q2: → Begin ERP cloud migration (Phase 1: Finance) → Deploy Kubernetes platform (EKS) → Migrate analytics to Power BI → Implement zero-trust network architecture Q3-Q4: → ERP cloud migration (Phase 2: Supply Chain) → Deploy API gateway and service mesh → SAP SuccessFactors migration → Implement data mesh architecture YEAR 3 (Optimization): ═══════════════════════════════════════ Q1-Q2: → Complete ERP cloud migration → Migrate remaining on-prem workloads → Implement AI/ML platform → Achieve multi-region active-active Q3-Q4: → On-prem datacenter closure → Optimize cloud costs (FinOps) → Continuous architecture improvement → Architecture maturity review INVESTMENT PLAN: ═══════════════════════════════════════ Year Migration New Platforms Infrastructure Total ───────────────────────────────────────────────────────────────── Y1 $500K $800K $600K $1,900K Y2 $1,200K $600K $400K $2,200K Y3 $800K $400K $300K $1,500K ───────────────────────────────────────────────────────────────── TOTAL: $2,500K $1,800K $1,300K $5,600K ROI: → Annual savings: $380K (rationalization) + $500K (cloud optimization) = $880K → Payback: 6.4 years (including transformation benefits) → Productivity improvement: 25% (estimated) ``` ### 4. Architecture Governance ``` ARCHITECTURE GOVERNANCE FRAMEWORK ═══════════════════════════════════════ ARCHITECTURE REVIEW BOARD (ARB): ═══════════════════════════════════════ Members: → CTO/VP Engineering (Chair) → Enterprise Architect → Security Architect → Data Architect → Cloud Architect → Application Architects (rotating) Mandate: → Review new project architectures → Approve technology selections → Enforce architecture principles → Manage technology standards → Resolve cross-team dependencies Meeting Cadence: → Weekly: Architecture stand-up (quick reviews) → Monthly: ARB meeting (formal reviews) → Quarterly: Architecture strategy review REVIEW PROCESS: ═══════════════════════════════════════ Phase 1: Request → Team submits architecture proposal → Include: use case, requirements, options analyzed, recommendation Phase 2: Assessment → ARB reviews against principles and standards → Check: security, scalability, cost, maintainability → Identify: risks, dependencies, alternatives Phase 3: Decision → Approve: Proceed as designed → Approve with conditions: Address specific concerns → Defer: Need more analysis → Reject: Doesn't meet standards; propose alternative Phase 4: Tracking → Track decisions in architecture repository → Monitor implementation compliance → Post-implementation review ``` ### 5. Architecture Documentation ``` ARCHITECTURE DOCUMENTATION FRAMEWORK ═══════════════════════════════════════ DOCUMENT TYPES (based on C4 model): ═══════════════════════════════════════ Level 1: Context Diagram → High-level view of system and stakeholders → Shows: users, external systems, main application → Audience: Executives, stakeholders → Format: Single page Level 2: Container Diagram → Major components and technologies → Shows: web app, API, database, message queue, SaaS integrations → Audience: Technical teams, architects → Format: 1-2 pages Level 3: Component Diagram → Internal structure of each container → Shows: modules, services, libraries → Audience: Developers → Format: Per component Level 4: Code-Level → Class diagrams, sequence diagrams → Audience: Developers → Format: Per feature/module TECHNOLOGY STANDARDS DOCUMENT: ═══════════════════════════════════════ Category Preferred Alternative Status ───────────────────────────────────────────────────────────────────── Cloud Platform AWS Azure Active Container Runtime Kubernetes Cloud Run Active Database (RDBMS) PostgreSQL MySQL Active Database (NoSQL) DynamoDB MongoDB Active Cache Redis Memcached Active Message Queue SQS/Kafka RabbitMQ Active API Framework FastAPI/Node.js Spring Boot Active Frontend React Vue.js Active Monitoring Prometheus/Grafana Datadog Active CI/CD GitHub Actions GitLab CI Active ``` ## Edge Cases - **Regulated industries**: Architecture must comply with HIPAA, PCI, SOX - **Legacy modernization**: Strangler pattern for gradual migration - **Multi-cloud**: Avoid vendor lock-in with abstraction layers - **Acquisition integration**: Merge architectures post-M&A - **Startup EA**: Lightweight approach, document as you grow ## Integration Points - **EA tools**: LeanIX, Ardoq, MEGA, BiZZdesign - **Cloud platforms**: AWS, Azure, GCP - **Documentation**: Confluence, GitHub Wiki, Draw.io - **CMDB**: ServiceNow, Lansweeper - **Project management**: Jira, Asana - **Portfolio management**: Clarity, Planview ## Output ### Architecture Summary ``` ENTERPRISE ARCHITECTURE STATUS ═══════════════════════════════════════ Applications: 40 (current) → 32 (target) Cloud adoption: 35% → 90% (3-year target) Annual savings from rationalization: $380K Investment required: $5.6M over 3 years Architecture governance: ARB meetings: Monthly Standards: 15 technology standards active Projects reviewed: 12 (Q4) ```