How to solve the problem when you need to optimize the route and there should be several points of pickups (warehouses) and one or more points of deliveries?
For example: courier need to pickup the goods from a pickup points and deliver them to delivery points. I think that is VRPSPD?
I thought it was a pickup and delivery, but the delivery cannot be made before the courier picks up the goods. First of all courier need to pickup the goods and then make a delivery.
But in this example, the goods are delivered first, and then making the pickups.
P.S. Maybe someone can help me with my other questions:
Thanks in advance.