This dissertation deals with the application of expert-based usability evaluation methods in vehicles. A deficit in this area of research could be shown by an exploratory literature review. In two comparative case studies the suitability of two concrete methods was systematically investigated. For the comparison, the methods cognitive walkthrough and guideline review were applied for the usability evaluation of different parts of an in-vehicle information system comparing the results with those of parallel usability tests. In order to satisfy the special context of use of an in-vehicle information system, established definitions of usability as well as their classification in the user-centered design process and the specific implications for the environment in the vehicle were considered. The two methods applied were then prepared specifically for the context of use in the vehicle. While no clear recommendation for the cognitive walkthrough in the context of use of a vehicle was found, the guideline review could achieve satisfactory results. Furthermore, the additional introduction of a new metric, based on the System Usability Scale (SUS), allows a comparison between individual versions of a system in the course of a project and thus closes a gap in the field of expert-based usability evaluation methods
