The project “Quality of Work and Economic Success”, commissioned by the Institute for Employment Research (IAB), uses a longitudinal approach to investigate how company personnel and business strategies affect the entrepreneurial development and the professional development of their employees. For this purpose, employees from companies that have previously participated in the IAB Establishment Panel are interviewed by telephone. In this context, the employees are asked about their perception and assessment of their working conditions and their work situation. The employee survey has been conducted by infas since 2013 and has so far comprised five survey waves, the last in 2021.