Homechevron_rightStandardschevron_rightISO/IEC 29158:2025

Active — Edition 2International Standardupdate Standard Updated: Mar 2025fact_check Fact checked: Oct 20, 2026

ISO/IEC 29158:2025

Automatic identification and data capture techniques — Bar code symbol quality test specification — Direct part mark (DPM)

apartmentPublishing Organization:International Organization for Standardization (ISO)

Global Manufacturing Automotive Aerospace & Defense Electronics Medical Devices

Standard Introduction

ISO/IEC 29158:2025 is an active — edition 2 standard published by International Organization for Standardization (ISO). It is commonly used across Manufacturing, Automotive, Aerospace & Defense, Electronics, Medical Devices and applies in Global.

Use this page to review the official documentation, current status, and the certification or assessment bodies most commonly associated with ISO/IEC 29158:2025.

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Direct part marks

Adapts two-dimensional symbol-quality assessment to marks created directly on component surfaces.

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Alternative illumination

Defines illumination conditions and measurement modifications needed for reflective, curved or textured parts.

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DPM-specific reporting

Adds terms, parameters, grading modifications and reporting rules for direct-part-mark verification.

list_alt DPM verification essentials

Start with the ISO/IEC 15415 quality methodology
Select the illumination condition required by the application
Measure the mark on the actual production part
Apply DPM-specific parameters and grading modifications
Report the result as a DPM grade
Retain verifier settings, sample orientation and surface conditions

Who Needs to Comply?

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Verifier manufacturers, application-specification developers and quality teams responsible for laser, dot-peen, inkjet, electrochemical or other barcodes marked directly on manufactured parts.

Key Requirements

Use the DPM method with ISO/IEC 15415

Apply the direct-part-mark modifications to the underlying two-dimensional symbol-quality methodology rather than treating DPM as an ordinary printed label.

Control illumination and geometry

Use the application-specified lighting arrangement, angle, aperture and setup appropriate to the mark and surface.

Measure representative production parts

Verify actual marked components across expected material, finish, curvature and process variation.

Record DPM-specific evidence

Report grades with the measurement configuration, illumination, verifier, sample orientation and relevant surface conditions.

Penalties & Enforcement

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ISO/IEC 29158 is a voluntary test standard. Required grades and illumination settings normally come from aerospace, automotive, electronics, medical-device, defence or customer specifications. A failed mark may cause part rejection, rework or loss of traceability.