# Inspection

Inspection methods, instruments and metrology, including measurement uncertainty and repeatability. See Sourcing for material certificates.

[Manufacturing Wiki](https://planar.so/wiki/index.md)

- [Instruments](https://planar.so/wiki/inspection/instruments/index.md): Manufacturing reference articles in Instruments.
- [Methods](https://planar.so/wiki/inspection/methods/index.md): Manufacturing reference articles in Methods.
- [Metrology](https://planar.so/wiki/inspection/metrology/index.md): Measurement uncertainty, guard bands, conformity decisions, gauge repeatability and reproducibility, and operator variation.

## Related guides

- [Choosing an EN 10204 inspection document](https://planar.so/wiki/sourcing/documents/choosing-en-10204-inspection-documents.md): Compare 2.1, 2.2, 3.1 and 3.2 documents and specify the evidence needed for a material delivery.