Governance runbooks.

Every FinOps capability — allocation, anomaly detection, forecasting — reads from this data. Each provider names the same cost column differently, so one cross-cloud question becomes three queries. And if billing stops arriving, every downstream report goes stale without anyone noticing.

You build one billing pipeline per provider, all landing daily in one store. Normalise to FOCUS so every source shares the same columns, run the FOCUS validator, and reconcile totals against invoices. Monitoring pages on stale sources; a written process handles provider schema changes.