International Standard Iso 14253 1.pdf Jun 2026

| Condition | Decision | |-----------|----------| | Measured ± U fully inside limits | | | Measured ± U fully outside limits | Reject | | Measured ± U straddles a limit | Indeterminate (need smaller U or re-evaluate) |

ISO 14253-1:2017(en), Geometrical product specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 1: Decision rules for verifying conformity or nonconformity with specifications INTERNATIONAL STANDARD ISO 14253 1.pdf

The standard allows (U) at other confidence levels (e.g., 99% for safety‑critical, (k \approx 2.58)), but 95% is the default. | Condition | Decision | |-----------|----------| | Measured