Dissertation

Dekomposition elementarer Bedienaufgaben zur systematischen Bewertung von Interaktionkonzepten moderner Infotainmentsysteme

Author:

Christopher Alfons Ewald Brockmeier

Pages:

149

DOI:

https://doi.org/10.18154/RWTH-2025-00263

Keywords:

Bedienaufgaben, Gebrauchstauglichkeit, HMI, Interaktionskonzept, MMI, active safety, aktive Sicherheit, infotainment, interaction concept, operating task, usability, user experience

Year:

2025

Language:

german

Format:

ebook

The number and variety of functions and thus the interaction complexity of modern in-vehicle-infotainment-systems (IVIS) has steadily increased in recent years and will continue to rise in the future, driven by user expectations, the economic importance for vehicle manufacturers and technological progress. Conversely, distraction from the driving task is one of the main causes of accidents. In this context, the aim of this thesis is to systematically analyse established interaction concepts and examine their usability and impact on active safety. For this purpose, a set of elementary operating tasks is derived by decomposing the interaction of typical use cases. On the one hand, this set represents a clearly defined and assessable area of evaluation, but on the other hand, with its few basic operating tasks, it also covers the typical spectrum of today's IVIS interactions. Based on the elementary operating tasks, modern IVIS are systematised with regard to their interaction design. In the following, the underlying interaction principles are selected for further consideration for each elementary operating task and interaction modality. The rotary pushbutton, the touchscreen and the touchpad are identified as the interaction modalities that are well established both in motor vehicles and in consumer electronics for interacting with complex human-machine interfaces. In addition, mid air gesture control is considered to have a high potential for innovation. Generic interaction concepts are developed subsequently as interactive prototypes to evaluate the interaction principles. Then, the usability in form of effectiveness, efficiency and satisfaction and its influence on active safety in the form of visual distraction and performance of the driving task are evaluated in a user study. It can be shown that there are considerable differences per interaction modality and elementary operating task in terms of usability and active safety and that no interaction modality is the most suitable for all operating tasks. The objective results correlate with the subjective user experience and therefore potentially also with a willingness to buy. Therefore the results provide insights on how to design possible future IVIS interaction concepts.