ISO 14253-1 provides critical decision rules for determining product conformity by integrating measurement uncertainty directly into the verification process. By requiring that the measurement result plus uncertainty falls within specification limits, the standard minimizes Type I and Type II errors in high-precision manufacturing. You can explore the full standard on the official ISO website.
It resolves the problem of false acceptance (accepting nonconforming parts) and false rejection (rejecting conforming parts) due to measurement errors. INTERNATIONAL STANDARD ISO 14253 1.pdf
ISO 14253-1:2017 is the primary international standard for Geometrical Product Specifications (GPS) ISO 14253-1 provides critical decision rules for determining
If the measured value lies between these outer limits (i.e., within (U) of the specification limit but on the “wrong” side), the standard says non‑conformance cannot be proven — it is indeterminate. Myth: "Tighter tolerances require special rules