# Late Data Reconciliation

> Source: https://sukruyusufkaya.com/en/glossary/late-data-reconciliation
> Updated: 2026-05-13T20:59:31.873Z
> Type: glossary
> Category: veri-muhendisligi-ve-ai-altyapisi
**TLDR:** A correction process that brings late-arriving data into alignment with previously produced batch outputs.

<p>Late data reconciliation is a critical corrective practice for preserving historical correctness in batch systems. If delayed records affect past summaries, KPIs, or reports, those outputs must be updated in a controlled way. Without this process, the data platform may remain silently wrong in retrospect. Reconciliation is the discipline of managing delayed correctness in data engineering.</p>