Wüest, DustinSeyff, NorbertGlinz, MartinJürjens, JanSchneider, Kurt2017-06-212017-06-212017978-3-88579-661-9We used FlexiSketch Team, our flexible modeling tool, in an explorative study to better understand how novice and experienced engineers sketch and define ad-hoc notations collaboratively in early requirements elicitation and design sessions.enCollaborationsketchingtoolad-hoc modelinglightweight metamodelingText/Conference Paper1617-5468