# #calibration

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Page: https://videotomd.com/t/calibration/
Briefs: 2

- [Prepare Survey Microdata for Calibration](https://videotomd.com/b/text-local-prepare-survey-microdata-b6fd6186ce48/index.md): Select appropriate person-level data, check coverage, extract observed values, and derive complete calibration margins.
- [Build Point-in-Time Historical Prediction Grades](https://videotomd.com/b/text-local-grade-historical-prediction-evidence-dae0e80cafdf/index.md): Generate internal calibration data only from series that can be reconstructed without look-ahead.