Ergonomics standards define how products and equipment are to be fitted to human capabilities and body dimensions. The most important families are ISO 9241 for human-system interaction, EN 614 for the ergonomic design of machinery, and DIN 33402 (a German national standard) for human body dimensions.
The three most important families
ISO 9241 is the most extensive series and covers human-system interaction, from the definition of usability in Part 11 through principles of information presentation to requirements for workstation design and accessibility.
EN 614 describes ergonomic design principles for machinery and is thus the bridge between ergonomics and machinery safety.
DIN 33402 provides human body dimensions as percentile values and is the basis for any dimensional design. It is a German national standard; the corresponding international standard ISO 7250-1 defines the body measurements and landmarks.
Current editions of the most important parts (as of October 2026): DIN EN ISO 9241-11:2018-11 (usability: definitions and concepts), DIN EN ISO 9241-110:2020-10 (interaction principles), DIN EN ISO 9241-210:2020-03 (human-centred design for interactive systems), DIN EN 614-1:2009-06 (ergonomic design principles, terminology and general principles), and DIN 33402-2:2020-12 (human body dimensions, values). The "DIN EN" and "DIN EN ISO" editions are the German versions of the European and international standards.
Rules are not a fixed state
Standards are revised. Anyone who designed against one edition has not automatically designed against the current one. Two recent examples: DIN EN ISO 7730 on thermal comfort was newly published in December 2025, and EN 301 549 on the accessibility of digital products was published in version V4.1.1 in September 2026.
In practice, this means the edition status belongs in the documentation, and a change of status is a reason to review your own design.
Typical weaknesses in practice
- Standard cited without an edition. The documentation states the standard number but not the edition against which the design was done.
- Outdated edition as the basis. A design is carried over from a previous project without checking whether the standard has since been republished.
- Process mistaken for content. A usability engineering process according to IEC 62366-1 is treated as proof that the ergonomic requirements are also met.
- Body dimensions without reference to the target group. Percentile values are adopted without checking whether the underlying data matches the intended users.
Relationship to IEC 62366-1
IEC 62366-1 governs the process by which usability of medical devices is achieved and demonstrated. The ergonomics standards supply the substantive requirements and data used for design within that process. They do not replace each other.
Ergonomics standards supply the substantive requirements and data for design: ISO 9241 for human-system interaction, EN 614 for machinery, and DIN 33402 for body dimensions. IEC 62366-1, by contrast, governs the process by which usability of medical devices is achieved and demonstrated; the two do not replace each other. Because standards are revised, the edition status belongs in the documentation.
Frequently asked questions (FAQ)
Which standard governs body dimensions for product design?
In German-speaking countries, DIN 33402 is the relevant series. It provides human body dimensions as percentile values and serves as the basis for dimensional design of products and workplaces. Internationally, ISO 7250-1 defines the body measurements and landmarks.
What is the difference between ISO 9241 and IEC 62366-1?
IEC 62366-1 governs the process by which usability of medical devices is achieved and demonstrated. ISO 9241 supplies substantive requirements for the design of human-system interaction. The process refers to the content but does not replace it.
How do I know whether an ergonomics standard is being revised?
The DIN Standards Committee Ergonomics (German: DIN-Normenausschuss Ergonomie) continually publishes drafts for comment, publications, and withdrawals. The edition status of a standard belongs in your own documentation, so that a change becomes visible as a reason for review.
Which editions are currently valid?
As of October 2026: DIN EN ISO 9241-11:2018-11, DIN EN ISO 9241-110:2020-10, DIN EN ISO 9241-210:2020-03, DIN EN 614-1:2009-06, and DIN 33402-2:2020-12. Before use, the status should be checked in the publisher's catalog.
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