Preely invited my old professor and supervisor from Uni Emilie Møllenbach (now employeed at Mobile Pay) to talk about how she uses Sketching in Mobile pay.
It was a joy to hear her talk, and reminded me how much I miss her lectures. Besides case examples of how she uses sketching in Mobile pay, her talk was about different roles and activites within design VS. the different design perspectives. Her key take away is that is pays off to stay longer in the explorative low fidility phase.
The above is the examples she showed of low fidelity, medium and high from a real case.