Overview
SIST EN ISO 9241-171:2026 - "Ergonomics of human-system interaction - Part 171: Guidance on software accessibility" provides comprehensive requirements and guidelines for designing accessible software. The standard is intended to ensure that interactive systems are usable by people with the widest range of physical, sensory, and cognitive abilities-including those with temporary or situational limitations and older adults. This standard complements general usability standards in the ISO 9241 series, notably ISO 9241-11 and ISO 9241-210, by addressing specific software considerations for accessibility. It does not specify requirements for assistive technologies themselves, but it does address how software should integrate with such technologies.
Key Topics
- Accessible Software Design
Guidance on designing software interfaces that accommodate varying user needs and abilities.
- User Inclusion
Principles that ensure systems are usable by people with diverse disabilities and age-related limitations.
- Support for Individualization
Recommendations for enabling users to customize interaction methods, display settings, and accessibility features according to their preferences.
- Consistency and Usability
Best practices on consistent naming, layout, and notification methods to avoid confusion and support learning.
- Perceivability and Feedback
Guidelines for presenting information using multiple sensory modalities (visual, auditory, tactile) and providing clear feedback.
- Integration with Assistive Technologies
Specifications for ensuring that software interacts effectively with screen readers, alternative input methods, and other support tools.
- Contextual Usability
Commitment to usability in diverse contexts, including mobile, web, home, office, and learning environments.
- Respect for Privacy and Security
Considerations for maintaining user privacy and data security in accessible systems.
Applications
SIST EN ISO 9241-171:2026 is relevant for a broad range of interactive systems and software, including:
- Web applications and websites
- Mobile applications
- Office and productivity software
- Home and entertainment systems
- Learning and library systems
This standard is valuable for:
- Developers and Designers: Guiding the specification, design, and development of accessible and usable software.
- Procurement Officers: Assisting organizations in selecting products that meet accessibility requirements.
- Quality Assurance and Evaluators: Providing benchmarks for assessing software accessibility.
- Educational Institutions: Incorporating best practices in curriculum for inclusive digital design.
By following this standard, organizations can improve accessibility compliance, expand their user base, enhance user satisfaction, and align with regulatory or procurement requirements.
Related Standards
For a holistic approach to ergonomics and accessibility in human-system interaction, consider these related standards:
- ISO 9241-11:2018 - Ergonomics of human-system interaction: Usability definitions and concepts
- ISO 9241-210:2019 - Ergonomics of human-system interaction: Human-centred design for interactive systems
- ISO/IEC Guide 71 - Guidelines for addressing accessibility in standards development
- W3C Web Content Accessibility Guidelines (WCAG) - Widely adopted principles for web accessibility
Ensuring software accessibility according to SIST EN ISO 9241-171:2026 supports inclusivity, legal compliance, and better user experiences across digital environments.