ISO 9241-305:2008

Overview

ISO 9241-305:2008, part of the ISO 9241 series on ergonomics of human‑system interaction, defines optical laboratory test methods for electronic visual displays. Its primary purpose is to provide standardized optical measurements and expert observation methods that help predict a display’s ergonomic performance with respect to the requirements in ISO 9241-303. ISO 9241-305 is aimed at laboratory evaluation rather than in‑situ user studies and complements terminology and requirements defined in ISO 9241-302 and ISO 9241-303.

Key Topics

The standard organizes tests into basic measurements (identified by M numbers) and compound test procedures (identified by P numbers). Key technical topics and measurement areas include:

• Measurement structure and reporting

  • Definition of objective, applicability, preparation, procedure, analysis and reporting for each method
  • Guidance on fixed and configurable measurement conditions

• Measurement conditions and setup

  • Display preparation (stabilization, cleaning, alignment)
  • Test patterns, test accessories and alignment of meter position
  • Ambient and test illumination control
  • Light measuring device (LMD) specifications, angular aperture and time response

• Optical measurement methods

  • Basic light measurements (luminance, illuminance)
  • Luminance profile and angular distribution
  • Directional light and bidirectional reflectance (BRDF)
  • Temporal performance (response, flicker)
  • Reflection measurements (specular and diffuse reflections)
  • Luminance and contrast analysis
  • Colour analysis and colour difference metrics
  • Geometrical and dimensional evaluations, defects, and alignment for virtual image displays

• Conformance and uncertainty

  • Reporting formats, uncertainty analysis guidance and conformance guidance with ISO 9241-303 requirements

Applications

ISO 9241-305 is practical for:

• Display manufacturers performing laboratory QA during R&D and production
• Test laboratories conducting compliance testing and performance validation
• Procurement teams specifying objective optical performance for displays used in offices, control rooms, medical devices or industrial systems
• Ergonomists and human factors engineers assessing visual ergonomics aspects such as contrast, luminance uniformity, reflections and temporal behaviour

Using ISO 9241-305 helps ensure objective, repeatable display testing aligned with ergonomic requirements, improving usability, visual comfort and compliance documentation.

Related Standards

• ISO 9241-302 - Terminology for electronic visual displays
• ISO 9241-303 - Requirements for electronic visual displays (target of the predictive tests)
• ISO 9241-307 - Analysis and compliance test methods for electronic visual displays
• Other parts of ISO 9241 series covering usability, field assessment and device‑specific guidance

Keywords: ISO 9241-305, optical laboratory test methods, electronic visual displays, display testing, luminance, contrast, colour analysis, reflection measurements, temporal performance, display compliance.