“…TA with flexible demand (Alidaee et al, 2011), real-time and dynamic assignment (Kim et al, 2007;Lin et al, 2013), time-dependent TA (Kingston & Schumacher, 2005), and finally, TA under uncertainty (Alighanbari & How, 2008;Hu et al, 2015a). However, the UAVTAP differs from the VRP by allowing, for example, multiple visits and subtours.…”