1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using HeuristicLab.Core;
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23 | using HeuristicLab.Data;
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24 | using HeuristicLab.Operators;
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25 | using HeuristicLab.Parameters;
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26 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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27 | using HeuristicLab.Problems.VehicleRouting.Encodings;
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28 |
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29 | namespace HeuristicLab.Problems.VehicleRouting {
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30 | public struct TourEvaluation {
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31 | public double Quality { get; set; }
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32 | public double VehcilesUtilized { get; set; }
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33 | public double TravelTime { get; set; }
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34 | public double Distance { get; set; }
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35 | public double Overload { get; set; }
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36 | public double Tardiness { get; set; }
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37 | }
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38 |
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39 | [Item("VRPEvaluator", "Evaluates solutions for the VRP problem.")]
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40 | [StorableClass]
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41 | public sealed class VRPEvaluator : VRPOperator, IVRPEvaluator {
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42 | #region ISingleObjectiveEvaluator Members
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43 | public ILookupParameter<DoubleValue> QualityParameter {
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44 | get { return (ILookupParameter<DoubleValue>)Parameters["Quality"]; }
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45 | }
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46 | #endregion
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47 |
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48 | public ILookupParameter<DoubleValue> VehcilesUtilizedParameter {
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49 | get { return (ILookupParameter<DoubleValue>)Parameters["VehiclesUtilized"]; }
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50 | }
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51 | public ILookupParameter<DoubleValue> TravelTimeParameter {
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52 | get { return (ILookupParameter<DoubleValue>)Parameters["TravelTime"]; }
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53 | }
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54 | public ILookupParameter<DoubleValue> DistanceParameter {
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55 | get { return (ILookupParameter<DoubleValue>)Parameters["Distance"]; }
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56 | }
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57 | public ILookupParameter<DoubleValue> OverloadParameter {
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58 | get { return (ILookupParameter<DoubleValue>)Parameters["Overload"]; }
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59 | }
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60 | public ILookupParameter<DoubleValue> TardinessParameter {
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61 | get { return (ILookupParameter<DoubleValue>)Parameters["Tardiness"]; }
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62 | }
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63 |
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64 | public ILookupParameter<IVRPEncoding> VRPSolutionParameter {
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65 | get { return (ILookupParameter<IVRPEncoding>)Parameters["VRPSolution"]; }
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66 | }
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67 |
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68 | public ILookupParameter<DoubleValue> FleetUsageFactor {
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69 | get { return (ILookupParameter<DoubleValue>)Parameters["FleetUsageFactor"]; }
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70 | }
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71 | public ILookupParameter<DoubleValue> TimeFactor {
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72 | get { return (ILookupParameter<DoubleValue>)Parameters["TimeFactor"]; }
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73 | }
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74 | public ILookupParameter<DoubleValue> DistanceFactor {
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75 | get { return (ILookupParameter<DoubleValue>)Parameters["DistanceFactor"]; }
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76 | }
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77 | public ILookupParameter<DoubleValue> OverloadPenalty {
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78 | get { return (ILookupParameter<DoubleValue>)Parameters["OverloadPenalty"]; }
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79 | }
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80 | public ILookupParameter<DoubleValue> TardinessPenalty {
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81 | get { return (ILookupParameter<DoubleValue>)Parameters["TardinessPenalty"]; }
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82 | }
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83 |
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84 | public VRPEvaluator()
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85 | : base() {
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86 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The evaluated quality of the VRP solution."));
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87 | Parameters.Add(new LookupParameter<DoubleValue>("VehiclesUtilized", "The number of vehicles utilized."));
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88 | Parameters.Add(new LookupParameter<DoubleValue>("TravelTime", "The total travel time."));
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89 | Parameters.Add(new LookupParameter<DoubleValue>("Distance", "The distance."));
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90 | Parameters.Add(new LookupParameter<DoubleValue>("Overload", "The overload."));
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91 | Parameters.Add(new LookupParameter<DoubleValue>("Tardiness", "The tardiness."));
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92 | Parameters.Add(new LookupParameter<IVRPEncoding>("VRPSolution", "The VRP solution which should be evaluated."));
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93 | Parameters.Add(new LookupParameter<DoubleValue>("FleetUsageFactor", "The fleet usage factor considered in the evaluation."));
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94 | Parameters.Add(new LookupParameter<DoubleValue>("TimeFactor", "The time factor considered in the evaluation."));
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95 | Parameters.Add(new LookupParameter<DoubleValue>("DistanceFactor", "The distance factor considered in the evaluation."));
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96 | Parameters.Add(new LookupParameter<DoubleValue>("OverloadPenalty", "The overload penalty considered in the evaluation."));
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97 | Parameters.Add(new LookupParameter<DoubleValue>("TardinessPenalty", "The tardiness penalty considered in the evaluation."));
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98 | }
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99 |
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100 | private double CalculateFleetUsage() {
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101 | IVRPEncoding vrpSolution = VRPSolutionParameter.ActualValue;
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102 |
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103 | return vrpSolution.Tours.Count;
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104 | }
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105 |
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106 | internal static TourEvaluation EvaluateTour(Tour tour, DoubleArray dueTimeArray,
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107 | DoubleArray serviceTimeArray, DoubleArray readyTimeArray, DoubleArray demandArray, DoubleValue capacity,
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108 | DoubleValue fleetUsageFactor, DoubleValue timeFactor, DoubleValue distanceFactor, DoubleValue overloadPenalty, DoubleValue tardinessPenalty,
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109 | DoubleMatrix coordinates, ILookupParameter<DoubleMatrix> distanceMatrix, BoolValue useDistanceMatrix) {
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110 | TourEvaluation eval = new TourEvaluation();
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111 |
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112 | double quality = 0.0;
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113 | double time = 0.0;
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114 |
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115 | double distance = 0.0;
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116 | double waitingTime = 0.0;
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117 | double serviceTime = 0.0;
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118 | double delivered = 0.0;
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119 |
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120 | double overweight = 0.0;
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121 | double tardiness = 0.0;
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122 |
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123 | //simulate a tour, start and end at depot
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124 | for (int i = 0; i <= tour.Cities.Count; i++) {
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125 | int start = 0;
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126 | if(i > 0)
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127 | start = tour.Cities[i - 1];
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128 | int end = 0;
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129 | if (i < tour.Cities.Count)
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130 | end = tour.Cities[i];
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131 |
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132 | //drive there
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133 | double currentDistace = VRPUtilities.GetDistance(start, end, coordinates, distanceMatrix, useDistanceMatrix);
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134 | distance += currentDistace;
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135 | time += currentDistace;
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136 |
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137 | //check if it was serviced on time
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138 | if (time > dueTimeArray[end])
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139 | tardiness += time - dueTimeArray[end];
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140 |
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141 | //wait
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142 | double currentWaitingTime = 0.0;
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143 | if (time < readyTimeArray[end])
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144 | currentWaitingTime = readyTimeArray[end] - time;
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145 | waitingTime += currentWaitingTime;
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146 | time += currentWaitingTime;
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147 |
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148 | //service
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149 | delivered += demandArray[end];
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150 | double currentServiceTime = serviceTimeArray[end];
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151 | serviceTime += currentServiceTime;
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152 | time += currentServiceTime;
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153 | }
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154 |
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155 | if (delivered > capacity.Value) {
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156 | overweight = delivered - capacity.Value;
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157 | }
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158 |
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159 | //Fleet usage
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160 | quality += fleetUsageFactor.Value;
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161 | //Travel time
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162 | quality += timeFactor.Value * time;
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163 | //Distance
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164 | quality += distanceFactor.Value * distance;
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165 |
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166 | //Penalties
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167 | quality += overloadPenalty.Value * overweight;
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168 | quality += tardinessPenalty.Value * tardiness;
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169 |
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170 | eval.Distance = distance;
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171 | eval.TravelTime = time;
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172 | eval.VehcilesUtilized = 1;
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173 | eval.Overload = overweight;
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174 | eval.Tardiness = tardiness;
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175 | eval.Quality = quality;
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176 |
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177 | return eval;
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178 | }
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179 |
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180 | public static TourEvaluation Evaluate(IVRPEncoding solution, DoubleArray dueTimeArray,
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181 | DoubleArray serviceTimeArray, DoubleArray readyTimeArray, DoubleArray demandArray, DoubleValue capacity,
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182 | DoubleValue fleetUsageFactor, DoubleValue timeFactor, DoubleValue distanceFactor, DoubleValue overloadPenalty, DoubleValue tardinessPenalty,
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183 | DoubleMatrix coordinates, ILookupParameter<DoubleMatrix> distanceMatrix, BoolValue useDistanceMatrix) {
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184 | TourEvaluation sumEval = new TourEvaluation();
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185 | sumEval.Distance = 0;
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186 | sumEval.Quality = 0;
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187 | sumEval.TravelTime = 0;
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188 | sumEval.VehcilesUtilized = 0;
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189 | sumEval.Overload = 0;
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190 | sumEval.Tardiness = 0;
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191 |
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192 | foreach (Tour tour in solution.Tours) {
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193 | TourEvaluation eval = EvaluateTour(tour, dueTimeArray, serviceTimeArray, readyTimeArray, demandArray, capacity,
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194 | fleetUsageFactor, timeFactor, distanceFactor, overloadPenalty, tardinessPenalty,
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195 | coordinates, distanceMatrix, useDistanceMatrix);
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196 | sumEval.Quality += eval.Quality;
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197 | sumEval.Distance += eval.Distance;
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198 | sumEval.TravelTime += eval.TravelTime;
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199 | sumEval.VehcilesUtilized += eval.VehcilesUtilized;
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200 | sumEval.Overload += eval.Overload;
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201 | sumEval.Tardiness += eval.Tardiness;
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202 | }
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203 |
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204 | return sumEval;
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205 | }
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206 |
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207 | public sealed override IOperation Apply() {
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208 | IVRPEncoding solution = VRPSolutionParameter.ActualValue;
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209 |
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210 | TourEvaluation sumEval = Evaluate(solution, DueTimeParameter.ActualValue, ServiceTimeParameter.ActualValue, ReadyTimeParameter.ActualValue,
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211 | DemandParameter.ActualValue, CapacityParameter.ActualValue,
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212 | FleetUsageFactor.ActualValue, TimeFactor.ActualValue, DistanceFactor.ActualValue, OverloadPenalty.ActualValue, TardinessPenalty.ActualValue,
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213 | CoordinatesParameter.ActualValue, DistanceMatrixParameter, UseDistanceMatrixParameter.ActualValue);
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214 |
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215 | QualityParameter.ActualValue = new DoubleValue(sumEval.Quality);
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216 | VehcilesUtilizedParameter.ActualValue = new DoubleValue(sumEval.VehcilesUtilized);
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217 | TravelTimeParameter.ActualValue = new DoubleValue(sumEval.TravelTime);
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218 | DistanceParameter.ActualValue = new DoubleValue(sumEval.Distance);
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219 | OverloadParameter.ActualValue = new DoubleValue(sumEval.Overload);
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220 | TardinessParameter.ActualValue = new DoubleValue(sumEval.Tardiness);
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221 |
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222 | return base.Apply();
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223 | }
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224 | }
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225 | }
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