The AI System Architect is the management owner of EST03 for AI: reference structures that make purpose, identity, oversight, validation, security and multi-entity ownership implementable. Role 14.1 states the business purpose. Role 2.3 codes the interfaces. Role 2.2 serves. Role 11.1 names the bundle. This role decides which patterns are allowed so those roles cannot invent an architecture that the signed purpose cannot carry.

Standing duties

• Establish approved patterns for high-risk and general-purpose use: serving, RAG, agents, oversight hooks, validation runtime, identity of the bundle, fail-closed.
• Recommend at Implement to Role 15.1 (release gate): no high-risk build on an unapproved pattern (no veto; ROLES13, t269). Exceptions are recorded and time-bounded.
• Raise ACT02 when a proposed architecture would change purpose, autonomy or who the system can act as. Raise ACT03 when production has drifted onto an unapproved pattern.
• Keep architecture current with the live estate — a reference model that does not match Role 11.1 baselines is decoration.
• Do not treat a reference diagram, a target-state slide or an approved-pattern badge as residual-risk acceptance.

Accountable to: AI Governance Lead / Head of Architecture / Enterprise Architect

Primary domain: Establish EST03 (AI architecture). Patterns constrain Implement and Operate. Does not Direct or accept residual risk.

Linked EN 18286 clauses: 4.4.2, 8.3.2.3, 8.3.2.4, 9.1

Format: 3 hours of training, EUR 200.