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Dashboards don’t represent actual state, models degrade unnoticed, and incidents show up as “weird numbers” instead of errors.
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Most data teams test code but not data.
That’s why dashboards don’t represent actual state, models degrade unnoticed, and incidents show up as “weird numbers” instead of errors.
This article breaks down **three levels of data testing** — schema, business logic, and contracts — and shows how to integrate them into CI/CD and monitoring without turning your data stack into a mess.
