Overview
CEN ISO/TR 9241-514:2022 (ISO/TR 9241-514:2020) is a technical report giving practical guidance for the use of anthropometric data within the ISO 9241-500 series on ergonomics of human–system interaction. It explains how to define the intended user population, select or weight anthropometric samples, and estimate design accommodation (the proportion of users whose body measurements are fit by a design). The document is intended for ergonomists, human factors engineers, product and workspace designers, and standards practitioners.
Key topics
- Scope and definitions: clear terms such as anthropometric accommodation, univariate and multivariate accommodation, percentile, user population, and weighting.
- Population sampling: how to define the intended user population and choose representative anthropometric samples; importance of sample size and demographic fit (extremes/tails matter for design decisions).
- Weighting: methods to statistically weight sample data when sample demographics differ from the target population-useful but limited when populations differ substantially (e.g., military vs. civilian).
- Univariate accommodation: using percentile values (e.g., 95th or 5th percentile) to estimate accommodation for single variables such as height or finger breadth. Example: using the greatest male 95th percentile for worldwide ceiling clearance.
- Multivariate accommodation: techniques for estimating simultaneous fit across multiple variables:
- Virtual Fit Test (VFT): count individuals in a sample who meet all specified dimension constraints and convert to a percentage.
- Principal Component Analysis (PCA) and boundary-case analysis to understand correlated body dimensions and identify extreme shapes.
- Handling limited data and combining percentiles (including Z-score considerations) for concurrent accommodation estimates.
- Statistical nature: emphasizes that accommodation estimates are statistical inferences from samples and not absolute guarantees.
Applications
This guidance is practical for:
- Designing workstations, chairs, control panels, vehicle interiors, and public spaces (e.g., terminal ceilings).
- Specifying clearances and safety guards (e.g., grid openings sized by the 5th percentile finger breadth).
- Performing ergonomic risk assessments, accessibility design, and virtual fit simulations during product development.
- Informing standards writers and procurement specifications that reference anthropometric accommodation levels.
Who should use it
- Ergonomists, industrial designers, human factors engineers
- Furniture and equipment manufacturers
- Architects and workspace planners
- Standards developers and regulatory bodies
Related standards
- ISO 9241 series (human–system interaction)
- ISO/TR 7250-2 (anthropometric data examples cited)
- ISO 26800 (system concept of ergonomics)
- ANSI/HFES 100:2007 (related methodologies)
- BIFMA G1 Guideline (sample-size guidance for tails)
Using CEN ISO/TR 9241-514 helps ensure ergonomic decisions about dimensions and clearances are backed by appropriate anthropometric methods and statistically defensible accommodation estimates.
