The Centre for Science and Technology Studies (CWTS) is an interdisciplinary research institute at Leiden University that studies scientific research and its connections to technology, innovation, and society. Our research, bibliometric and scientometric tools, and evaluation expertise provide a solid basis for supporting research assessment and strategic decision-making and for developing science policy. As a leading research, consulting, and training center, CWTS is dedicated to increasing our understanding of scientific quality, societal impact, and other related concepts. In PathOS, CWTS will lead in WP2 on Methods, tools and indicators and will cover one case study in WP3.