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Understanding the International Standard ISO 14253-1: Geometric Product Specification (GPS) - Inspection by Coordinate Measuring Machines (CMM) - Part 1: Vocabulary

Chronicle: Understanding International Standard ISO 14253-1 INTERNATIONAL STANDARD ISO 14253 1.pdf

According to ISO 14253-1:

• For conformance: (\textLSL + U) to (\textUSL - U)
• For non‑conformance: (< \textLSL - U) or (> \textUSL + U)

This single sentence shifts the economic dynamic. For conformance: (\textLSL + U) to (\textUSL -

. It is critical for industries that rely on high-precision manufacturing because it accounts for the inevitable measurement uncertainty that occurs in every inspection. ISO - International Organization for Standardization Core Concept: The "Golden Rule" The standard operates on a simple principle: uncertainty must work against the party making the claim HN Metrology Proving Conformity: This single sentence shifts the economic dynamic

2. The Decision Rules

The standard establishes "Decision Rules" to handle this uncertainty. It defines three distinct zones for a specification limit (e.g., a tolerance):