#2 Basic VRP: Stems from tsp where sales people all leave from the same depot, visit customers (all customers are only seen by one sales person) and sales people return to the depot at end of the day. VRP: All customers need to be serviced by a homogenous fleet of vehicles.Real life:Depot working hoursCustomer delivery windowsHeterogeneous fleet of vehiclesVehicle capacity constraintsPrioritiesDifferent off loading times (fixed and variable)Maybe product-product exclusionsMaybe product vehicle exclusionsMultiple tripsSleep outs