ASME Y14.45-2021 PDF

Full title and description

ASME Y14.45-2021 — Measurement Data Reporting. This American National Standard establishes uniform practices for reporting attribute and variable measurement data associated with geometric dimensioning and tolerancing (GD&T) specifications (ASME Y14.5) and the definition of actual values (ASME Y14.5.1). The standard defines formats, characteristic identifiers, and three reporting methods (Method A — pass/fail, Method B — measured value, Method C — supplemental numerical information) to ensure consistent recording and exchange of measurement results for product acceptance, manufacturing evaluation, and design development.

Abstract

This standard provides a consistent framework for conveying measurement results independently of the measurement equipment or process used. It specifies how characteristics are identified, how data are organized into complete or reduced reports, and how to represent conformance (pass/fail), measured values, and supplemental numerical information to support interpretation, traceability, and downstream decision-making. The document is intended to be used in conjunction with ASME Y14.5-2018 and ASME Y14.5.1-2019.

General information

• Status: Active / Current (2021 edition).
• Publication date: December 31, 2021.
• Publisher: ASME (American Society of Mechanical Engineers).
• ICS / categories: Technical drawings, metrology and measurement, manufacturing engineering (examples: 01.100.x; 17.020; 25.030).
• Edition / version: 2021 edition (ASME Y14.45-2021).
• Number of pages: 108–110 pages (published editions commonly listed as 108 or 110 pages).

Scope

ASME Y14.45-2021 establishes uniform practices for reporting attribute or variable measurement data for dimensioning and tolerancing specifications defined in ASME Y14.5-2018 and the actual-value definitions in ASME Y14.5.1-2019. It addresses measurement data used for product acceptance, manufacturing process evaluation, and design development, and specifies reporting requirements that are independent of measurement hardware or software. The standard may be used with earlier versions of Y14.5 where not in conflict with Y14.5-2018.

Key topics and requirements

• Characteristic identifiers and standardized labels for reported features and tolerances.
• Three reporting methods: Method A (pass/fail conformance), Method B (measured/actual values), and Method C (additional numerical information for traceability and analysis).
• Complete reporting versus reduced reporting formats and guidance on when to use each.
• Requirements ensuring reporting independence from measurement equipment, algorithms, or sampling strategy.
• Formats for tabular data, metadata (part, inspection conditions, measurement adjustments), and notation to support unambiguous interpretation.
• Guidance to support integration of measurement reports with quality, production, and engineering workflows (e.g., CMM outputs, inspection reports).

Typical use and users

Used by quality and metrology engineers, design and manufacturing engineers, inspection personnel, CMM programmers, supplier quality engineers, and anyone responsible for creating, reviewing, or interpreting GD&T inspection reports. Typical applications include incoming inspection, first article inspection, in-process control, final acceptance, and engineering investigations where standardized measurement reporting improves communication and decision-making.

Related standards

Primary related documents are ASME Y14.5-2018 (Geometric Dimensioning and Tolerancing) and ASME Y14.5.1-2019 (Mathematical definition of dimensioning and tolerancing principles / actual values). The Y14 series contains other complementary standards on product definition and documentation practices that together establish drawing and digital-product-definition practices used with Y14.45 reporting conventions.

Keywords

Measurement data reporting, GD&T reporting, ASME Y14.45, actual values, Method A, Method B, Method C, inspection report, CMM data, metrology, product acceptance, measurement format.

FAQ

Q: What is this standard?

A: ASME Y14.45-2021 is the ASME standard that defines how to report measurement results for geometric features and tolerances — providing standardized methods and report formats to convey pass/fail decisions, measured values, and supplemental numerical information.

Q: What does it cover?

A: It covers identification of characteristics, three reporting methods (A/B/C), formats for complete and reduced reports, required metadata, and guidance to keep reporting independent of measurement equipment or software. It is intended to be used alongside ASME Y14.5 and Y14.5.1.

Q: Who typically uses it?

A: Quality/metrology engineers, inspectors, CMM programmers, manufacturing and design engineers, and supplier quality personnel who create, analyze, or exchange inspection and measurement reports.

Q: Is it current or superseded?

A: The 2021 edition is the current ASME Y14.45 edition (published December 31, 2021). Users should check ASME notifications for any errata or subsequent revisions.

Q: Is it part of a series?

A: Yes — it is part of the ASME Y14 series (Engineering Product Definition and Related Documentation Practices) and is intended to be used in conjunction with other Y14 standards, notably ASME Y14.5 and ASME Y14.5.1.

Q: What are the key keywords?

A: Measurement data reporting, Method A, Method B, Method C, GD&T reporting, actual values, inspection report, CMM, metrology.