I try to modelise the problem below
1° Vehicles start from the depot, with staff members on bord
and then do pickups and delivery (the locations of those are different from the depot location).
2° The number of staff members present in the depot at the begin of the day is limited.
3° The number of staff members that must be in the vehicule depends on the cargaison shiped.
4° So the vehicules need to be aible to go back to the depot to free the staff members and go for a new pickup and delivey with new staff member’s configuration.
I don’t see how to modelize that, due to the fact that the vehicle have only one route. And also that because the number of staff members available in the depot at time T, seems very tricky to modelize…
Help would be welcomed