“…To sum up, partial practical insights were gained in different expert rounds, i.e., both case studies [4,9,28,33,34,39,49,51] and expert interviews [1,8,24,29,32]. The gained insights relate the challenges of datadriven projects to people [3,4,6,8,12,23,24,25,27,28,34,39,52], data [1,7,8,24,27,28,29,32,34,49], tools and technologies [8,27,28,34,39], as well as processes [8,24,28,33,34,39,47]. However, none of the extracted findings were further evaluated with a larger sample of data experts.…”