Operational Metadata
Technical metadata describes shape and business metadata describes meaning. Operational metadata describes what actually happened, and it changes every day.
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Data Observability
A large change in row count calls for investigation. Expected-count tests, reconciliation, current-state observation, and anomaly detection provide complementary evidence.
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Data Quality and Data Contracts
A green test suite means the data broke none of the rules you thought to write. Whether the numbers are correct is a different question with a different owner.
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Data SLIs, SLOs, and Incident Response
A green job does not mean a reliable dataset. Learn to define data indicators, set objectives, alert on budget burn, find silent failures, and tell consumers what to do.