In this paper we consider the question of how quality assurance can have a real, positive impact on the quality of teaching and learning at universities, considering the realities of different systems--the system of control and the system of quality culture--in using the example of two universities: the KNITU-KAI in Russia and the TU Dresden in Germany. The study involved 40 lecturers of technical courses and 120 third-year students of technical courses from both universities. The authors put forward a working hypothesis that quality assurance has a positive effect on the quality of teaching and learning if it carries out its informational, motivational and administrative functions. The results have shown that the aforementioned functions are not fulfilled by both universities and a special organizational culture is not the only condition that must be met for effective evaluation efforts. In order to fulfill motivational, informational and administrative functions, it is important as well that the quality assurance system is transparent and that all participants see that the surveyed data and results lead to measures for quality development. It is equally important that all university members participate in the process of quality assurance.