Use business impact analysis to assign a defensible DR tier to a service.
The trap A high-traffic homepage is labeled Tier 1 while licensing is Tier 3 because it is quiet. Traffic volume can hide dependency impact. The model Impact over time Tiering starts with how fast impact becomes unacceptable, then checks dependency blast radius and workaround strength. Weak shortcut Rank by traffic or owner pressure. A tier that explains why it deserves the DR spend. Assign the tier to the business consequence, then design the recovery pattern to match. 01 Impact 02 Dependency 03 Try First read Licensing has low traffic but blocks every paid session after token expiry.
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