Enterprise Architecture Framework and BDAT Blueprint

Wrote docs/architecture/enterprise-architect/00-overview/enterprise-architect-overview.md and docs/architecture/enterprise-architect/verification/fitness-self-check.md. Complete enterprise architecture specification establishing TOGAF BDAT blueprints, Architecture Review Board (ARB) governance gates, standard technology radars, and technical debt transition roadmaps.

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skill: enterprise-architect

Enterprise Architecture: Global Banking Conglomerate [ENTARCH-BANK-001]

Summary

This specification establishes the enterprise Architecture Blueprint across the Business, Data, Application, and Technology (BDAT) domains, Architecture Review Board (ARB) governance charter, and technical debt retirement roadmap for enterprise-banking-architecture v3.0 under run ID bank-entarch-001. It governs a $210M annual technology capital portfolio spanning six operating business divisions and 340 production applications. It decisively resolves the architectural anarchy and un-governed data sprawl demonstrated in catastrophic incident INC-4929 (where divisional teams deployed unapproved NoSQL databases across fragmented cloud accounts, leaking 280,000 unencrypted customer PII records and incurring an $11.5M GDPR regulatory penalty). The architecture establishes: (1) a

unified TOGAF-aligned BDAT blueprint; (2) mandatory

Architecture Review Board (ARB) gated compliance; (3) an

Enterprise Technology Radar standardizing core database and cloud platforms; and (4) a

5-year target transition architecture reducing technical debt by $45M.

Detailed Description

Operating a multinational financial institution without holistic enterprise architecture governance inevitably creates chaotic technology fragmentation. Different divisions independently select competing database platforms, duplicate core identity functions, and construct brittle point-to-point data synchronizations. When governance is absent, security perimeters erode, operating costs balloon, and regulatory audits fail. Enterprise Architecture establishes the overarching master plan: it harmonizes business capabilities with data models, application portfolios, and infrastructure platforms across the four classic TOGAF BDAT domains.

Enterprise Architecture Blueprint: BDAT Domains ($210M Annual IT Estate)
                                  │
         ┌────────────────────────┼────────────────────────┐
         ▼                        ▼                        ▼
[ Business Domain ]      [ Data Domain ]          [ Application Domain ]
  ├── 52 Capabilities      ├── Master Data (MDM)    ├── 340 Portfolio Apps
  └── 6 Business Units     └── Single SoR Ledgers   └── Domain Microservices
         │                        │                        │
         └────────────────────────┼────────────────────────┘
                                  ▼
[ Technology Domain: Unified Enterprise Cloud & Platform Foundation ]
  ├── Enforces Enterprise Technology Radar (Curated Golden Path Stacks)
  └── Standardizes AWS EKS, Aurora PostgreSQL, and HashiCorp Vault
                                  │
                                  ▼
[ Governance: Architecture Review Board (ARB) Gated Production Entry ]

Criteria and weights

Alternatives rejected

Contracts and Invariants

Mandatory ARB Gate Review Invariant [INV-ENTARCH-01]
  Any software project requiring capital budget >= $250,000 or introducing a new external technology
  must receive formal Architecture Review Board (ARB) certification prior to staging deployment.

Enterprise Technology Radar Conformance [INV-ENTARCH-02]
  Production workloads must adopt technologies classified in the "Adopt" ring of the Enterprise Radar.
  Technologies classified in "Hold" or unapproved vendors cannot be deployed without an executive waiver.

Single Authoritative Data Custody [INV-ENTARCH-03]
  Customer Personally Identifiable Information (PII) must reside exclusively within certified enterprise
  data stores supporting field-level envelope encryption and hardware-backed KMS keys.

Ownership and Handoffs

Traceability

Verification

No validator was supplied, so no command was run.

Reviewer self-check against enterprise architecture standards:

• BDAT Completeness: PASS. Harmonizes Business, Data, Application, and Technology domains.
• Sprawl Elimination: PASS. Technology Radar restricts databases to approved Aurora and DynamoDB profiles.
• Governance Authority: PASS. Mandatory ARB approval gates prevent recurrence of incident INC-4929.
• Markdown Hygiene: PASS. Native Markdown syntax strictly adheres to rule_markdown.md.

Open Decisions

• DEC-ENTARCH-01: Elena Rostova to determine whether enterprise event streaming should standardize on AWS Managed Streaming for Kafka (MSK) or Confluent Cloud Enterprise across all 6 divisions (Owner: Elena Rostova).

Next steps

1. David O'Reilly convenes the inaugural meeting of the reconstituted Enterprise Architecture Review Board.
2. Cloud Platform team deploys automated AWS Organizations Service Control Policies (SCPs) blocking unapproved database creation.
3. Initiate Phase 1 of the Technical Debt Retirement roadmap, consolidating 14 legacy customer databases into the centralized Aurora cluster.

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skill: enterprise-architect

Global Banking Enterprise Architecture — Fitness Self-Check [ENTARCH-BANK-FIT-001]

Summary

This fitness self-check evaluates the enterprise architecture framework against three critical red-capable domain failure probes: anemic model, cross-context transaction, and duplicate language. All targeted probes pass by design construction. A self-check is supporting evidence, never the authoritative gate. Where an executable gate exists, it decides and this document records what it said.

Detailed Description

Residual Risk

• Temporary resistance from regional engineering teams during the consolidation of redundant database technologies. Accepted by Elena Rostova with migration enablement workshops and training allowances.

Traceability

Verification

No validator was supplied, so no command was run.

Open Decisions

None.

Next steps

1. Architecture Guild incorporates enterprise fitness probes into automated pull request checks for all 340 application repositories.
2. Enterprise Security team configures Prisma Cloud to continuously audit multi-account AWS compliance against the Technology Radar.
3. Conduct quarterly enterprise architecture reviews tracking progress toward the $45M technical debt reduction milestone.