Access to the information and the next action should remain clear.
Updated November 2026 · Version 3.0
Approach
4SI uses WCAG 2.2 Level AA as a design and engineering objective. This statement describes the public website; it is not a certification or claim of complete conformance. Presence and Fellowship have separate interfaces.
Interface features
- Semantic headings, navigation landmarks, labelled controls and descriptive links.
- Visible keyboard focus, a skip-to-content link and keyboard-operable dialogs.
- Text feedback in addition to color, and clear success or error states.
- Responsive layouts, readable text and scrolling regions for wide tables.
- Reduced-motion handling and pause controls for moving content.
- Text descriptions and full reading views alongside visual explanations.
Appearance supports Light, Dark and the system setting. Reduced-motion behavior follows your device preference where supported.
Known limitations
Detailed papers, third-party source documents and downloads may not meet the same accessibility objectives as the website. Long tables and publications may require more navigation. Illustrative product films without spoken information are accompanied by text explaining the intended workflow; moving content can be paused. Automated checks and viewport tests do not establish compatibility with every assistive technology or physical device.
Feedback and alternative access
Report a barrier to contact@by4si.com. Include the page, device or assistive technology and the task you could not complete if possible. We prioritize barriers that prevent access to core content, forms, privacy rights or navigation and consider an accessible alternative format.