By Marlin Wolf Ulmer
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Additional info for Approximate Dynamic Programming for Dynamic Vehicle Routing
The segments are combined to paths. The paths are assigned to a travel distance and travel time for every vehicle. Both may depend on the statuses of the segments and the vehicle’s specifications. , a set of vehicles (in the traffic network) to conduct services or to deliver or collect goods at customers. 1 General RVRP-Entities 27 heterogeneous and have loading or travel capacities. , the volume of loaded goods and the travel duration or distance are limited. Further, vehicles may have different (driver’s) skills and specifications.
4 Constraints As main constraints, we differentiate between customers’ time windows, drivers’ working hours, and vehicles’ capacities. , a violation may not be allowed. , violations are allowed but result in penalties or costs respectively. 1 Time Windows In many cases, customers have to attend home to receive the service or delivery. Therefore, time windows are communicated. A time window for a customer is defined by the earliest and latest possible point of time the customer can be visited by a vehicle.
5. Notably, we focus on the drivers of uncertainty and confine ourselves to the most conventional objectives and constraints. We use the induced classification to present the most prominent practical routing applications. We analyze the different applications regarding the requirement for replanning or stepwise planning. First, we formally present the required entities, objectives, constraints, and uncertainty factors to describe the majority of vehicle routing applications as depicted in Fig. 1.