AI Executive Office — CXO Assistant Platform

Solution Architecture v1.0 · Azure-native, multi-tenant, sovereign-capable · Data & AI Global Practice · 2026-09

A multi-tenant AI Executive Office on Azure, architected as a decision intelligence platform rather than a chatbot with company data: a governed conversational layer over enterprise systems, specialist agents, decision intelligence and controlled execution, built for a sovereign public-sector scenario and for the commercial tenants that come after it.

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Architecture views

30 views, each in three formats.

Open a view to read it in full. Every SVG carries its diagram source inside it, so it opens in diagrams.net fully editable with no import step; the draw.io files are the same diagrams as plain source.

  1. 01
    System Context

    Who uses the executive office, what it depends on, and what has deliberately been left outside the line.

  2. 02
    High-Level Architecture

    The shape of the platform in one picture: six stages from an executive's question to a governed action.

  3. 03
    Actors and Their Core Journeys

    Who the platform is for, in their own words, and the named things each of them gets to do with it.

  4. 04
    Journey — CXO, Morning Brief to Approved Intervention

    The journey the platform exists for, and the moment it fails: being asked to approve on the strength of a number you cannot defend.

  5. 05
    Journey — Implementation Lead, Onboarding a Tenant

    The journey that decides whether this is a product or a bespoke build repeated: six weeks, no forked code.

  6. 06
    Journey — Governance Officer, Reconstructing a Decision

    Four months later, a regulator asks how a decision that moved money was reached. This journey is the reason several other views exist.

  7. 07
    Layered Architecture

    What depends on what, and the one dependency that is deliberately allowed to point the other way.

  8. 08
    Container Architecture

    The deployable units inside one tenant, the technology behind each, and which of them holds a credential.

  9. 09
    Integration Catalogue

    Every way the platform touches another system, with protocol, cadence and direction — including the two it is allowed to write to.

  10. 10
    Multi-Tenancy and Isolation

    One codebase, two deployment shapes, and isolation sold as a tier rather than promised as a property.

  11. 11
    Data Architecture — Zones by Rebuildability

    Which stores are a cache with a rebuild script, and which one is the thing a regulator reads.

  12. 12
    Data Flow — Source to Answer

    Where data comes from, at what cadence, and what happens to a batch that fails its quality gate.

  13. 13
    Canonical Data Model

    The entities every agent shares — and the four the platform owns, which exist in no source system.

  14. 14
    Enterprise Knowledge — Ingest to Cited Answer

    How a policy, a contract or a board paper becomes a citation the executive can open, without leaking a document they may not read.

  15. 15
    Critical Flow — One Question, End to End

    The path a single executive question takes, and the two places it can honestly fail.

  16. 16
    Agent Orchestration

    Who does what across a turn — and why the specialist agents are capability packs rather than separate applications.

  17. 17
    Who Answers What

    The routing table that keeps the language model out of arithmetic. Read the last column.

  18. 18
    Proactive Intelligence — Signal to Situation

    How an exception is found before anyone asks, and why no model is asked to watch the business.

  19. 19
    The Closed Loop

    See, understand, predict, decide, act, monitor — and the record that all six stages write to.

  20. 20
    Governed Execution

    How an approval becomes a write in a system of record, and how the platform knows whether it worked.

  21. 21
    Deployment Topology

    Where it runs, what the failure domains are, and why a second region is a tier option rather than a default.

  22. 22
    Delivery — Code and Configuration

    Two pipelines at different speeds, and the gate that stops a prompt change quietly degrading every tenant's answers.

  23. 23
    Observability

    The signals, where they go, and the one metric that means the product is failing even when every service is green.

  24. 24
    Model and Prompt Lifecycle

    The loop that keeps answers honest as models, prompts and the business all change underneath them.

  25. 25
    Degradation Contract

    A written statement of what still works when each dependency fails — and the one case where the platform refuses rather than degrades.

  26. 26
    Security Zones

    Where an attacker arrives, what stops them, and what they would actually get if they took the orchestrator.

  27. 27
    Identity and Authorisation

    How the caller's authority reaches the row — and why there is no service account that can read everything.

  28. 28
    Sovereignty and Residency

    What stays in country, the short list of what is allowed out, and the constraint that could invalidate the design.

  29. 29
    AI Governance and Guardrails

    Every control on the path of a single turn, and the three ways the platform is allowed to not answer.

  30. 30
    Audit and Lineage

    Everything captured, how custody is proved, and why the evidence is a snapshot rather than a query to re-run.

The package

Everything as it was delivered.

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