Library / First Principles Framework (FPF) - Core Conceptual Specification
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F.12:11.1 - CDN latency by region

Promise content: p95 end-user latency ≤ 200 ms per region per month. Delivery Work population: delivery occurrences per region in that month. Evidence: response-time observations tagged by region and path. If probes measure the promised characteristic directly, use C.16 and A.10 without a proxy. If they indicate a distinct user-experience characteristic, name the exact probe-to-user relation, its defining or testing pattern, and last-mile loss. Evaluation Work returns one result per region on the declared scale. A global all-regions statement is a separate logical aggregation of those results or statuses, not a property of a table row.