Capture the why
A decision log should record the question, alternatives, evidence, constraints, approving authority, date, dissent or uncertainty, and conditions that would trigger reconsideration.
Public-safe modernization case study
The Decision Record Is Part of the System
Modernization becomes durable when the evidence, authority, assumptions, and acceptance behind important choices remain available after meetings, staffing changes, and vendor transitions.
Connect the chain
Each decision should link to the originating need, requirement, authoritative source, control, test, acceptance evidence, release, and accountable service owner.
Minimum decision record
- Stable identifier, title, status, owner, approver, and effective date.
- Problem statement, options considered, evaluation criteria, and evidence reviewed.
- Dependencies, assumptions, risks, constraints, and unresolved questions.
- Acceptance criteria and the artifact demonstrating that those criteria were met.
- Review date, superseding decision, and a clear history of amendments.
- Classification and retention rules appropriate to the record and its supporting material.
Govern through evidence
- Identify which choices require formal governance and which can remain team-level decisions.
- Use a consistent record template and authoritative repository.
- Require traceable evidence before approval or acceptance.
- Review unresolved assumptions at defined delivery gates.
- Preserve superseded decisions so future teams understand why the system evolved.
Executive takeaway
Architecture diagrams describe what was built. Decision records explain why it deserves trust. Treat both as first-class modernization assets.