The dissertation is a design-based research cycle, which constitutes a skills diagnostics model for vocational schools. The paper serves as a tool to determine educational levels and competencies and is used in class within the framework of the subject technical product design. The author concludes the dissertation with a comparison of the measurement procedure and the actual competencies of the lecturers. The paper uses theory and empiricism to establish a link between scientific evidence and usability within the classroom.weiterlesen