Architecture / Architecture Operating Models
A practical operating model for architecture
Connect enterprise direction, solution delivery and operational reality through explicit services, lifecycle accountabilities and evidence-led outcome measures.
Start here
An architecture function needs a clear mandate, customer-facing services, defined intervention points across delivery and a measurement system that shows whether architecture changes outcomes.
Scope and accountabilities for enterprise, solutions and operational architects.
Open guide →02 · InterventionLeadership, contribution and hand-offs across three architecture layers.
Open guide →03 · OfferThe 18 customer-facing services offered by each role.
Open guide →04 · AccountabilitySix families, outcome measures, ownership and PLAs.
Open guide →05 · EvidenceIndicators, sources, transformations, controls and scorecards.
Open guide →06 · AdoptionFrom definition to an institutionalised PLA-grade rhythm.
Open guide →Why this is different
This model does not stop at producing designs or governing projects. It joins direction, delivery, live-estate integrity, measurement and investment into one closed loop.
| Approach | Conventional EA/SA guidance | This operating model |
|---|---|---|
| Architecture through life | Involvement peaks around strategy and design, then reduces after deployment. | Accountability runs from Strategy to Retirement, including operation, optimisation, debt and decommissioning. |
| Operational architecture | After go-live, responsibility transfers to Operations, SRE, platforms or service management. | The OA retains architectural ownership of drift, resilience, observability, capacity, lifecycle and operability. |
| Role model | EA, solution architecture and operations often work as separate organisational domains. | EA → SA → OA is one continuous value chain: direction becomes a solution, then remains architecturally coherent in service. |
| Governance | Success means complying with standards and passing a review board. | Assurance asks whether the intended outcome survived delivery and remains true in production. |
| Measurement | Scorecards count reviews, standards, meetings, exceptions and attendance. | ODMs measure what changed because Architecture existed; contributing indicators expose deterioration early. |
| Quality | Review completion or design compliance acts as the proxy for quality. | Defect containment measures where flaws are discovered and makes escapes into build, test or production visible. |
| Economics | Value is expressed qualitatively through alignment, consistency and risk reduction. | Rework cost, technical debt and investment outcomes connect performance to capacity and cost trade-offs. |
| Performance commitments | Architecture works to informal expectations or review-turnaround SLAs. | Performance Level Agreements make capability level and the investment required to sustain it an explicit business choice. |
| Conformance | Conformance is checked at a design gate and then assumed. | Production drift, technology currency and debt are measured after deployment. |
| Scale | More demand is answered mainly by adding architects. | Patterns, guardrails and practitioner uplift make routine design self-service and reserve architects for novel risk. |
A conventional lifecycle often ends architectural accountability when a project hands over to BAU. Here, the Operational Architect remains accountable for whether the live implementation still represents the intended architecture. Drift, ageing technology, debt, resilience weaknesses and operational workarounds therefore become architecture information—not merely operational problems.
How it fits together
The Enterprise Architect sets direction across the estate. The Solutions Architect translates direction into buildable change. The Operational Architect makes operability, resilience and lifecycle health explicit. They are separate accountabilities but one system of work.
Follow the value streamComplete source
Download the original workbook. Illustrative thresholds and values remain clearly labelled.