Perceivability

Through the principle of perceivability, we ensure that functions and information are presented in such a way that every user can actually notice them. A key aspect for us is the so-called two-channel principle. This means that we make information perceivable through two different sensory channels.

In simple terms, we ensure that:

• all information that can be perceived visually is also audible,
• all information that can be perceived aurally is also visible,
• we do not rely solely on colors to convey information, in order to compensate for color blindness,
• and that, whenever possible, we also support/represent information tactually.

In practice, we implement this, among other things, by ensuring that:

• all images and graphics include alternative text,
• the duration of time-based media can be adjusted,
• text sizes can be changed,
• we ensure sufficient contrast between foreground and background or make foreground and background sounds distinguishable,
• and we provide videos with subtitles.

Operability

To ensure that users can interact with our IT solutions, we make sure that they are operable for people with disabilities.

This includes, among other things:

• keyboard operability, which is essential for people with motor impairments or blindness, and which we guarantee,
• time limits for individual interaction steps, which we design to be sufficient for all users,
• avoiding blinking or flashing content to prevent seizures in people with epilepsy,
• supporting orientation through clear and meaningful link texts and through multiple navigation paths,
• and providing alternatives for pointer gestures or complex gestures.

Understandability

The principle of understandability is something we value even beyond the context of IT accessibility. We ensure that content is readable and understandable for the broadest possible audience — even when read aloud. Therefore, we use clear and simple language whenever possible and provide explanations for technical terms, unusual expressions, or abbreviations when needed, so that non-experts, people with a different native language, or individuals with cognitive impairments can easily understand the content. The principle of understandability also includes the predictability of the user interface through consistent design and navigation, as well as support in preventing input errors.