In applied Human Factors research user needs are of crucial importance. When dealing with a system, e.g. surfing in the internet or collecting a train ticket at a self-service machine, expectancies will influence the user's perception of how good or bad a system is. Poor interaction design can cause annoyance or even severe errors.
To prevent such negative outcomes usability testing checks for the effectiveness, efficiency and satisfaction in human machine interactions. Chemnitz University of Technology's usability projects usually cover user tests, expert reviews and user acceptance studies. All those projects happen to be closely connected to the needs of the developers. University staff and companies work together on research questions and product improvement to make sure results are rapidly transferred.