protected override double GetTourInsertionCosts(IVRPProblemInstance instance, IVRPEncoding solution, TourInsertionInfo tourInsertionInfo, int index, int customer,
out bool feasible)
{
CVRPInsertionInfo insertionInfo = tourInsertionInfo.GetStopInsertionInfo(index) as CVRPInsertionInfo;
double costs = 0;
feasible = tourInsertionInfo.Penalty < double.Epsilon;
IHeterogenousCapacitatedProblemInstance cvrp = instance as IHeterogenousCapacitatedProblemInstance;
double overloadPenalty = cvrp.OverloadPenalty.Value;
double startDistance, endDistance;
costs += instance.GetInsertionDistance(insertionInfo.Start, customer, insertionInfo.End, solution, out startDistance, out endDistance);
double demand = instance.GetDemand(customer);
if (demand > insertionInfo.SpareCapacity)
{
feasible = false;
if (insertionInfo.SpareCapacity >= 0)
{
costs += (demand - insertionInfo.SpareCapacity) * overloadPenalty;
}
else
{
costs += demand * overloadPenalty;
}
}
return(costs);
}
protected override void EvaluateTour(VRPEvaluation eval, IVRPProblemInstance instance, Tour tour, IVRPEncoding solution)
{
TourInsertionInfo tourInfo = new TourInsertionInfo(solution.GetVehicleAssignment(solution.GetTourIndex(tour)));
eval.InsertionInfo.AddTourInsertionInfo(tourInfo);
double originalQuality = eval.Quality;
IHeterogenousCapacitatedProblemInstance cvrpInstance = instance as IHeterogenousCapacitatedProblemInstance;
double delivered = 0.0;
double overweight = 0.0;
double distance = 0.0;
int tourIndex = solution.GetTourIndex(tour);
int vehicle = solution.GetVehicleAssignment(tourIndex);
double capacity = cvrpInstance.Capacity[vehicle];
for (int i = 0; i < tour.Stops.Count; i++)
{
delivered += instance.GetDemand(tour.Stops[i]);
}
double spareCapacity = capacity - delivered;
//simulate a tour, start and end at depot
for (int i = 0; i <= tour.Stops.Count; i++)
{
int start = 0;
if (i > 0)
{
start = tour.Stops[i - 1];
}
int end = 0;
if (i < tour.Stops.Count)
{
end = tour.Stops[i];
}
//drive there
double currentDistace = instance.GetDistance(start, end, solution);
distance += currentDistace;
CVRPInsertionInfo stopInfo = new CVRPInsertionInfo(start, end, spareCapacity);
tourInfo.AddStopInsertionInfo(stopInfo);
}
eval.Quality += instance.FleetUsageFactor.Value;
eval.Quality += instance.DistanceFactor.Value * distance;
eval.Distance += distance;
eval.VehicleUtilization += 1;
if (delivered > capacity)
{
overweight = delivered - capacity;
}
(eval as CVRPEvaluation).Overload += overweight;
double penalty = overweight * cvrpInstance.OverloadPenalty.Value;
eval.Penalty += penalty;
eval.Quality += penalty;
tourInfo.Penalty = penalty;
tourInfo.Quality = eval.Quality - originalQuality;
}
protected override void EvaluateTour(VRPEvaluation eval, IVRPProblemInstance instance, Tour tour, IVRPEncoding solution)
{
TourInsertionInfo tourInfo = new TourInsertionInfo(solution.GetVehicleAssignment(solution.GetTourIndex(tour)));
eval.InsertionInfo.AddTourInsertionInfo(tourInfo);
double originalQuality = eval.Quality;
IHeterogenousCapacitatedProblemInstance cvrpInstance = instance as IHeterogenousCapacitatedProblemInstance;
DoubleArray demand = instance.Demand;
ITimeWindowedProblemInstance vrptw = instance as ITimeWindowedProblemInstance;
DoubleArray dueTime = vrptw.DueTime;
DoubleArray readyTime = vrptw.ReadyTime;
DoubleArray serviceTimes = vrptw.ServiceTime;
IPickupAndDeliveryProblemInstance pdp = instance as IPickupAndDeliveryProblemInstance;
IntArray pickupDeliveryLocation = pdp.PickupDeliveryLocation;
IMultiDepotProblemInstance mdp = instance as IMultiDepotProblemInstance;
IntArray vehicleAssignment = mdp.VehicleDepotAssignment;
int depots = mdp.Depots.Value;
double time = 0.0;
double waitingTime = 0.0;
double serviceTime = 0.0;
double tardiness = 0.0;
double overweight = 0.0;
double distance = 0.0;
int tourIndex = solution.GetTourIndex(tour);
int vehicle = solution.GetVehicleAssignment(tourIndex);
int depot = vehicleAssignment[vehicle];
double capacity = cvrpInstance.Capacity[vehicle];
double currentLoad = 0.0;
Dictionary <int, bool> stops = new Dictionary <int, bool>();
int pickupViolations = 0;
double tourStartTime = readyTime[0];
time = tourStartTime;
//simulate a tour, start and end at depot
for (int i = 0; i <= tour.Stops.Count; i++)
{
int start = 0;
if (i > 0)
{
start = tour.Stops[i - 1];
}
int end = 0;
if (i < tour.Stops.Count)
{
end = tour.Stops[i];
}
//drive there
double currentDistace = vrptw.GetDistance(start, end, solution);
time += currentDistace;
distance += currentDistace;
double arrivalTime = time;
int endIndex;
if (end == 0)
{
endIndex = depot;
}
else
{
endIndex = end + depots - 1;
}
//check if it was serviced on time
if (time > dueTime[endIndex])
{
tardiness += time - dueTime[endIndex];
}
//wait
double currentWaitingTime = 0.0;
if (time < readyTime[endIndex])
{
currentWaitingTime = readyTime[endIndex] - time;
}
double waitTime = readyTime[endIndex] - time;
waitingTime += currentWaitingTime;
time += currentWaitingTime;
double spareTime = dueTime[endIndex] - time;
double arrivalSpareCapacity = capacity - currentLoad;
if (end > 0)
{
//service
double currentServiceTime = serviceTimes[end - 1];
serviceTime += currentServiceTime;
time += currentServiceTime;
//Pickup / deliver
bool validPickupDelivery =
validPickupDelivery =
((demand[end - 1] >= 0) ||
(stops.ContainsKey(pickupDeliveryLocation[end - 1])));
if (validPickupDelivery)
{
currentLoad += demand[end - 1];
}
else
{
pickupViolations++;
}
if (currentLoad > capacity)
{
overweight += currentLoad - capacity;
}
}
double spareCapacity = capacity - currentLoad;
CVRPPDTWInsertionInfo stopInfo = new CVRPPDTWInsertionInfo(start, end, spareCapacity, tourStartTime,
arrivalTime, time, spareTime, waitTime, new List <int>(stops.Keys), arrivalSpareCapacity);
tourInfo.AddStopInsertionInfo(stopInfo);
stops.Add(end, true);
}
eval.Quality += instance.FleetUsageFactor.Value;
eval.Quality += instance.DistanceFactor.Value * distance;
eval.Distance += distance;
eval.VehicleUtilization += 1;
(eval as CVRPEvaluation).Overload += overweight;
double tourPenalty = 0;
double penalty = overweight * cvrpInstance.OverloadPenalty.Value;
eval.Penalty += penalty;
eval.Quality += penalty;
tourPenalty += penalty;
(eval as CVRPTWEvaluation).Tardiness += tardiness;
(eval as CVRPTWEvaluation).TravelTime += time;
penalty = tardiness * vrptw.TardinessPenalty.Value;
eval.Penalty += penalty;
eval.Quality += penalty;
tourPenalty += penalty;
(eval as CVRPPDTWEvaluation).PickupViolations += pickupViolations;
penalty = pickupViolations * pdp.PickupViolationPenalty.Value;
eval.Penalty += penalty;
tourPenalty += penalty;
eval.Quality += penalty;
eval.Quality += time * vrptw.TimeFactor.Value;
tourInfo.Penalty = tourPenalty;
tourInfo.Quality = eval.Quality - originalQuality;
}
protected override void EvaluateTour(VRPEvaluation eval, IVRPProblemInstance instance, Tour tour, IVRPEncoding solution)
{
TourInsertionInfo tourInfo = new TourInsertionInfo(solution.GetVehicleAssignment(solution.GetTourIndex(tour)));
eval.InsertionInfo.AddTourInsertionInfo(tourInfo);
double originalQuality = eval.Quality;
IHeterogenousCapacitatedProblemInstance cvrpInstance = instance as IHeterogenousCapacitatedProblemInstance;
DoubleArray demand = instance.Demand;
ITimeWindowedProblemInstance vrptw = instance as ITimeWindowedProblemInstance;
DoubleArray dueTime = vrptw.DueTime;
DoubleArray readyTime = vrptw.ReadyTime;
DoubleArray serviceTimes = vrptw.ServiceTime;
IMultiDepotProblemInstance mdp = instance as IMultiDepotProblemInstance;
IntArray vehicleAssignment = mdp.VehicleDepotAssignment;
int depots = mdp.Depots.Value;
double time = 0.0;
double waitingTime = 0.0;
double serviceTime = 0.0;
double tardiness = 0.0;
double delivered = 0.0;
double overweight = 0.0;
double distance = 0.0;
int tourIndex = solution.GetTourIndex(tour);
int vehicle = solution.GetVehicleAssignment(tourIndex);
int depot = vehicleAssignment[vehicle];
double capacity = cvrpInstance.Capacity[vehicle];
for (int i = 0; i < tour.Stops.Count; i++)
{
delivered += instance.GetDemand(tour.Stops[i]);
}
double spareCapacity = capacity - delivered;
double tourStartTime = vrptw.ReadyTime[depot];
time = tourStartTime;
//simulate a tour, start and end at depot
for (int i = 0; i <= tour.Stops.Count; i++)
{
int start = 0;
if (i > 0)
{
start = tour.Stops[i - 1];
}
int end = 0;
if (i < tour.Stops.Count)
{
end = tour.Stops[i];
}
//drive there
double currentDistace = vrptw.GetDistance(start, end, solution);
time += currentDistace;
distance += currentDistace;
double arrivalTime = time;
int endIndex;
if (end == 0)
{
endIndex = depot;
}
else
{
endIndex = end + depots - 1;
}
//check if it was serviced on time
if (time > dueTime[endIndex])
{
tardiness += time - dueTime[endIndex];
}
//wait
double currentWaitingTime = 0.0;
if (time < readyTime[endIndex])
{
currentWaitingTime = readyTime[endIndex] - time;
}
double waitTime = readyTime[endIndex] - time;
waitingTime += currentWaitingTime;
time += currentWaitingTime;
double spareTime = dueTime[endIndex] - time;
//service
double currentServiceTime = 0;
if (end > 0)
{
currentServiceTime = serviceTimes[end - 1];
}
serviceTime += currentServiceTime;
time += currentServiceTime;
CVRPTWInsertionInfo stopInfo = new CVRPTWInsertionInfo(start, end, spareCapacity, tourStartTime, arrivalTime, time, spareTime, waitTime);
tourInfo.AddStopInsertionInfo(stopInfo);
}
eval.Quality += instance.FleetUsageFactor.Value;
eval.Quality += instance.DistanceFactor.Value * distance;
eval.Distance += distance;
eval.VehicleUtilization += 1;
if (delivered > capacity)
{
overweight = delivered - capacity;
}
(eval as CVRPEvaluation).Overload += overweight;
double tourPenalty = 0;
double penalty = overweight * cvrpInstance.OverloadPenalty.Value;
eval.Penalty += penalty;
eval.Quality += penalty;
tourPenalty += penalty;
(eval as CVRPTWEvaluation).Tardiness += tardiness;
(eval as CVRPTWEvaluation).TravelTime += time;
penalty = tardiness * vrptw.TardinessPenalty.Value;
eval.Penalty += penalty;
eval.Quality += penalty;
tourPenalty += penalty;
eval.Quality += time * vrptw.TimeFactor.Value;
tourInfo.Penalty = tourPenalty;
tourInfo.Quality = eval.Quality - originalQuality;
}
