What it means
ADRs create a durable decision trail that helps future teams understand why a security boundary, identity model, cryptographic choice, or exception exists.
Why it matters
Systems outlive the people who designed them. Recorded decisions reduce repeated debate and make it easier to reassess assumptions when conditions change.
Practical focus
- Record the problem and constraints before the chosen answer
- List meaningful alternatives and tradeoffs
- Link decisions to requirements, risks, and evidence
- Supersede old records rather than rewriting history
Common mistakes
- Documenting only the final technology name
- Using ADRs for trivial implementation details
- Removing rejected options and lost assumptions
- Never revisiting decisions after major change
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: