# Software architecture document example > A finished nine-page software architecture document, with its diagrams, written by Ainna for VentureForce. Three pages are open here; the other six stay closed. A finished example, not a template. Page: https://ainna.ai/documents/architecture · Word · 9 pages, with diagrams · Document 12 of 12, the build · Updated 6 October 2026 · Document designs by George Krasadakis ## The pages on show - Page 1 of 9, Title page: The system's architecture in brief, under the concept's name. Image: https://ainna.ai/images/examples/architecture-example-01-1200.webp - Page 3 of 9, The system in context: Who uses the system and what it exchanges data with, drawn as a diagram of editable Word shapes. Image: https://ainna.ai/images/examples/architecture-example-03-1200.webp - Page 4 of 9, Logical architecture: The layers and their components, with each component's responsibilities, design and technology. Image: https://ainna.ai/images/examples/architecture-example-04-1200.webp The other 6 pages stay closed. ## What is a software architecture document? A system analysis, design and architecture document describes a system at a high level: its context and logical architecture as diagrams, its components, integrations, data, security, deployment and the key decisions. For software, digital and integration concepts. Also called: System analysis, design and architecture, System design document, SAD. ## Why it matters Architecture is decided early, whether anyone writes it down or not. Written down, each choice shows its alternatives, and the quality targets the system must meet are set before they are costly to change. ## From context to decisions The document is drawn from the PRD and from the same system model as the FRS. 1. **Context.** The system as one box: who uses it and what it exchanges data with, as a diagram. In Ainna's document: the system in context. 2. **Structure.** The logical architecture: its layers and components, and each component's responsibilities. In Ainna's document: the logical architecture; components and their responsibilities. 3. **Qualities.** Quality attributes with targets, security, and the deployment and recovery objectives. In Ainna's document: quality attributes, security, deployment. 4. **Decisions.** Each significant choice, with the alternatives considered and why this one won. In Ainna's document: architecture decisions. ## What's inside - The architecture in brief - What drives it - The system in context, as a diagram - The logical architecture, as a diagram - Components and their responsibilities - Integration patterns - Data and its stores - Quality attributes, with targets - Security - Deployment and recovery objectives - Architecture decisions - Risks and transition ## Where it comes from Distilled from the PRD, and the same system model as the FRS. Comes after: [Product Requirements Document (PRD)](https://ainna.ai/documents/prd) · [Functional Requirements Specification (FRS)](https://ainna.ai/documents/frs) ## Questions **What goes into a software architecture document?** Ainna's covers the system in context and its logical architecture, both as diagrams; the components and their responsibilities; how it integrates with other systems; its data and where it is stored; quality attributes with targets; security; deployment and recovery objectives; and the key architecture decisions with their alternatives. **What is a system context diagram?** One picture of the system as a single box, the people who use it and the systems it exchanges data with. It is the first diagram an architecture document needs. **What is an architecture decision record?** A short note for each significant choice: the decision, the alternatives considered, and why this one won. **Architecture document or FRS?** The FRS says what the system must do. The architecture document says how it is structured to do it, and how well it must perform. ## Links - The problem behind the idea: [Problem 0032 on Problem Radar](https://ainna.ai/problems/workforce-unprepared-for-the-disruption-ai-is-bringing) - All twelve documents: https://ainna.ai/documents (Markdown: https://ainna.ai/documents.md) ## Clarity, by design Every document is architected and designed for one purpose: clarity. The designs are original, built on the method of Innovation Mode 2.0 (Springer Nature, 2026), where some of them are published. Its author, George Krasadakis, has spent 25 years building products, in a career that spans Microsoft, Accenture, GSK and ResMed. Ainna distils your work into each one: every claim in its place, every figure with its source or its assumption. Decks are set in Roboto, documents in Georgia. ## About the sample It comes from one public problem, number 0032 on Problem Radar (https://ainna.ai/problems/workforce-unprepared-for-the-disruption-ai-is-bringing), which Ainna framed and developed into one idea, VentureForce. It is a concept, not a company; its market figures are AI estimates.