Template: Design Doc

Title: [Clear, descriptive title]
Author(s): [Name(s)]
Date Created: [YYYY-MM-DD]
Status: Draft / In Review / Final
Reviewers: [Names of reviewers/stakeholders]


Overview

A high-level summary of what youโ€™re designing and why.
Include just enough context to help new readers quickly understand the proposal.

Problem Statement

What problem are you solving?
Why is it important? Include any user pain points, system limitations, or business motivations.

Goals & Non-Goals

Goals:

  • What this design aims to accomplish

Non-Goals:

  • Whatโ€™s explicitly out of scope (to reduce confusion)

Detailed Design

Describe the proposed solution in detail. Use diagrams, pseudocode, or data flows if helpful.

Include:

  • Architecture overview
  • Key components/modules
  • Data models and APIs
  • Security, performance, and scalability considerations
  • UX/UI (if applicable)

Alternatives Considered

List any other approaches that were evaluated.
Include reasons why they were not chosen.

Trade-offs

Discuss known trade-offs, such as:

  • Simplicity vs. flexibility
  • Short-term vs. long-term
  • Cost vs. performance

Testing & Validation

How will the solution be tested?
Unit tests, integration tests, performance testing, etc.

Milestones / Timeline

Milestone Target Date
Design review YYYY-MM-DD
Implementation start YYYY-MM-DD
Feature complete YYYY-MM-DD
Launch / rollout YYYY-MM-DD

Risks & Mitigations

What might go wrong, and how will you reduce those risks?

Examples:

  • Risk: Data loss โ€“ Mitigation: Shadow write during migration
  • Risk: Feature misuse โ€“ Mitigation: Add usage constraints

Open Questions

Any unresolved decisions or questions that need team input.

Stakeholders

Role Name Involvement
Engineering Lead [Name] Reviewer
Product Manager [Name] Requirements
QA [Name] Test planning

Appendix / References

Include links to related tickets, RFCs, diagrams, spreadsheets, Slack threads, etc.

Approval

Approver Role Decision Date
[Name] [e.g., Tech Lead] โœ… / โŒ [Date]