The Solution Intent Document (SID)¶
Overview¶
A Solution Intent Document (SID) captures the architectural vision, context, and rationale behind a solution.
It is not a detailed design document — it defines what the solution is intended to achieve, why it is being built that way, and how it aligns with enterprise architecture, strategy, and constraints.
The SID provides a shared understanding between business, delivery, and technology stakeholders, ensuring all parties are aligned on scope, intent, and key decisions before deep technical design begins.
Purpose¶
The Solution Intent Document serves to:
- Establish architectural intent — linking business needs to solution direction.
- Provide traceability from strategy → requirements → architecture → delivery.
- Define boundaries, constraints, and assumptions early in the lifecycle.
- Communicate the solution’s vision, scope, and principles clearly to all teams.
- Act as a governance artifact for architecture review and approval.
When to Use¶
- Early in solution definition or initiation phases.
- During architecture review board (ARB) preparation.
- As an input to detailed design, program planning, or RFP/vendor engagement.
- As a baseline for architectural change control and traceability.
Core Sections of a Solution Intent Document¶
The structure may vary across organizations, but a well-formed SID typically includes the following sections:
1. Executive Summary¶
A concise, non-technical overview describing:
- The business problem or opportunity being addressed.
- The desired outcomes and strategic alignment.
- The scope (what is included/excluded).
- A high-level summary of the proposed solution direction.
2. Business Context and Drivers¶
Defines why the solution exists.
- Key business objectives and expected benefits.
- Pain points, gaps, or drivers prompting change.
- Alignment to enterprise strategy, target operating model, or transformation roadmap.
- Critical success factors and KPIs.
3. Solution Overview¶
Describes what the solution will do and its high-level architecture.
- Solution scope and capabilities.
- Conceptual architecture diagram (context view).
- Key components and integrations (with brief explanation).
- Target users, consumers, or business units impacted.
Tip: Keep this at a conceptual level — leave implementation details for later design phases.
4. Architecture Principles and Approach¶
Defines the guiding principles and approach that shape the solution.
- Architectural principles (e.g., cloud-first, API-first, reusable-by-default).
- Technology alignment to enterprise standards or reference architectures.
- Chosen patterns or styles (e.g., microservices, event-driven, serverless).
- Governance alignment (Well-Architected, security baselines, compliance).
5. Key Decisions and Trade-offs¶
Documents major architectural decisions, including rationale and implications.
- Decision summary (use ADRs for detail).
- Trade-offs considered (e.g., build vs buy, platform selection).
- Risks, mitigations, and outstanding decisions.
Purpose: Demonstrates transparency and architectural reasoning — not just the outcome.
6. Constraints and Assumptions¶
Lists known factors that influence solution design.
| Type | Example |
|---|---|
| Business Constraint | Must go live by Q4 to meet regulatory deadline |
| Technical Constraint | Must run on existing Azure landing zone |
| Assumption | SSO integration will be available via enterprise identity provider |
7. Non-Functional Requirements (NFRs)¶
Captures the critical quality attributes of the solution — the “ilities”.
| Category | Examples |
|---|---|
| Performance | Response < 2s for 95% of requests |
| Scalability | Auto-scale to handle 10x seasonal traffic |
| Availability | 99.9% uptime |
| Security | Align with ISO27001 and CIS Benchmarks |
| Maintainability | Automated CI/CD deployment pipelines |
| Observability | Logging, tracing, and alerting integrated with monitoring tools |
8. Technology Stack and Dependencies¶
Outlines the proposed technology components and dependencies.
- Platforms, services, and products being used (with version or lifecycle info).
- Reuse of approved enterprise technologies.
- Identification of new or non-standard technologies (with rationale).
- Dependency mapping (internal and external systems).
Integrate with your Technology Inventory and TIME model for lifecycle visibility.
9. Data and Integration Considerations¶
Summarizes how the solution will handle data and interoperate.
- Key data entities, flows, and storage considerations.
- Integration approach (APIs, events, messaging, ETL).
- Data security, privacy, and compliance implications (e.g., GDPR).
10. Deployment and Environment Strategy¶
Describes how and where the solution will be deployed.
- Cloud provider or hosting model.
- Environment model (dev, test, staging, production).
- Deployment and release approach (manual vs CI/CD).
- High-level operational ownership (run/support model).
11. Risks and Mitigations¶
Identifies key risks and proposed mitigations.
| Risk | Impact | Likelihood | Mitigation |
|---|---|---|---|
| Integration latency | Medium | High | Introduce caching and async messaging |
| Vendor lock-in | High | Medium | Use abstraction layer for portability |
| Legacy dependency | High | High | Create modernization roadmap |
12. Alignment and Governance¶
Specifies how the solution aligns with enterprise governance.
- Related reference architectures or patterns used.
- Enterprise architecture domain alignment (e.g., Data, Integration, Security).
- Architecture Review Board (ARB) status and approvals.
- Compliance with standards and policies.
13. Future State and Lifecycle Considerations¶
Captures how the solution will evolve over time.
- Anticipated growth or expansion areas.
- Known limitations or planned enhancements.
- Technology lifecycle position (using the TIME model — Tolerate, Invest, Migrate, Eliminate).
- Sunset strategy for replaced systems.
14. Appendices¶
Include supporting materials such as:
- Detailed diagrams (C4 model, sequence, deployment).
- Architecture Decision Records (ADRs).
- Glossary of terms.
- References to related documents (Business Case, Security Review, NFR Traceability Matrix).
Recommended Practices¶
- Keep it concise: Focus on intent and rationale, not exhaustive detail.
- Use visuals: Diagrams and tables communicate faster than text.
- Version control: Maintain in Git or Confluence with version history.
- Link, don’t duplicate: Reference related documentation rather than copy content.
- Review and update: Revisit during major milestones or design changes.
Recommended Tools and Templates¶
- Markdown + GitHub / Azure DevOps Wiki: Lightweight, version-controlled documentation.
- Confluence: Centralized collaboration with templates and diagrams.
- Draw.io / Lucidchart / PlantUML: Architecture diagramming tools.
- ADR Tools: For structured decision logging (e.g.,
adr-tools,log4brains).
Key Takeaways¶
- The Solution Intent Document captures why and what, not every detail of how.
- It is the anchor document for architecture alignment, decision traceability, and stakeholder communication.
- The SID ensures solutions remain strategically aligned, technically sound, and operationally feasible before detailed design begins.
- Keep it living — the SID evolves as the solution and understanding mature.