Free tool Decision Altitude Review
Place the capability where it can create leverage.
Answer six questions about consumers, coordinated change, stability, blast radius, implementation independence, and ownership. The result is a starting point for an architecture review, not an automatic decision.
Method Use the result as evidence
The score does not replace judgment.
A capability can be widely reused and still be too unstable to centralize. A local implementation can also create organization-wide cost. Review the strongest answer, the weakest assumption, and the cost of reversing the decision.