# Architecture on a Page (AoAP)

**OrdoAnimi Template** · Module 03 — Design
One page. One view. No ambiguity.

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**Document metadata**

| Field | Value |
|---|---|
| System / solution name | |
| Version | 0.1 DRAFT |
| Author | |
| Date | |
| Status | Draft / For Review / Approved |
| Classification | OFFICIAL (or higher if required) |

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## The One-Line Statement

> [System name] [does what] for [whom] by [how], subject to [primary constraint].

*Example: The Grants Management Platform processes and approves research grant applications for the Department, using a rules-based workflow engine, subject to the Grants Policy Framework.*

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## Context — Why This Exists

| | |
|---|---|
| Business driver | |
| Strategic alignment | |
| Trigger (project / incident / compliance) | |
| Key constraint | |

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## Scope

**In scope:**
-
-
-

**Out of scope:**
-
-
-

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## Key Stakeholders

| Role | Name / Team | Interest |
|---|---|---|
| Business owner | | Outcome / budget |
| Technical owner | | System delivery |
| Security | | Risk / compliance |
| Operations | | Run / support |

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## Current State (one paragraph)

> Brief description of what exists today — not what is wrong with it. One paragraph. If nothing exists, state: *No current-state system. Greenfield.*

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## Target State (one paragraph)

> Brief description of the intended future state. What changes. What stays. One paragraph.

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## Architecture View — Component Summary

| Component | Role | Technology (if known) | Notes |
|---|---|---|---|
| | | | |
| | | | |
| | | | |
| | | | |

*For a visual view, see the Mermaid or C4 diagram linked in the SAD.*

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## Key Integration Points

| System | Direction | Protocol / Method | Data exchanged |
|---|---|---|---|
| | Inbound / Outbound / Both | | |
| | | | |

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## Key Decisions Made

| # | Decision | Rationale | ADR ref |
|---|---|---|---|
| 1 | | | ADR-001 |
| 2 | | | ADR-002 |

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## Key Decisions Open

| # | Decision required | Owner | By when |
|---|---|---|---|
| 1 | | | |
| 2 | | | |

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## Constraints

| Type | Constraint |
|---|---|
| Security | |
| Regulatory | |
| Technology | |
| Cost | |
| Time | |

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## Risks — Top Three

| Risk | Likelihood | Impact | Mitigation |
|---|---|---|---|
| | H/M/L | H/M/L | |
| | H/M/L | H/M/L | |
| | H/M/L | H/M/L | |

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## Next Artefact

- [ ] CSA — Conceptual Solution Architecture (if pathway requires)
- [ ] SAS — Solution Architecture Summary (if pathway requires)
- [ ] ADRs raised for each open decision above

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*OrdoAnimi · Architecture on a Page · v1.0*