On Friday 12 December 2025, Aïcha Leroy will defend her PhD thesis Understanding variations in the order picking process: Data-driven and simulation-based approaches. This thesis has been supervised by prof. dr. Kris Braekers (UHasselt), prof. dr. An Caris (UHasselt) and prof. dr. Benoît Depaire (UHasselt). The defense will take place at Hasselt University, in room H6 (building D, campus Diepenbeek, Agoralaan, 3590 Diepenbeek), at 16:00.