In the development of a system or product, we always focus on the iterative usability engineering lifecycle, which is applied to the processing of various issues. During the three system development phases (analysis, prototype development and evaluation), which are repeated several times, a variety of methods is used, with the exact selection always depending on the issues in question and / or the respective development goals. In order to assess driver states, we also frequently use our tried and tested fatigue scale, which was a complete in-house development. Additionally, the utilization of driver modeling is another part of our methodological portfolio.
The analysis phase is based on the actual development status of the product. After all requirements have been defined in the analysis phase, implementation concepts are being developed. is the acquisition of evaluational data and opinions regarding the effectiveness, efficiency and satisfaction of users interacting with the system.
Simulators offer the advantage of allowing more diverse problems (e.g. traffic) to be investigated in a very efficient manner that could not be achieved in field exper-iments.
HFC GmbH has developed a methodology to reliably assess driver drowsiness - the HFC-Drowsiness Scale.