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Ignore:
Timestamp:
01/26/12 14:50:56 (12 years ago)
Author:
abeham
Message:

#1614: improved results output of GQAP

Location:
branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3
Files:
4 edited

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  • branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Analyzers/BestGQAPSolutionAnalyzer.cs

    r7412 r7415  
    2929using HeuristicLab.Parameters;
    3030using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
     31using HeuristicLab.Problems.GeneralizedQuadraticAssignment.Common;
    3132
    3233namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment {
    … …  
    5152      get { return (LookupParameter<DoubleMatrix>)Parameters["Weights"]; }
    5253    }
     54    public LookupParameter<DoubleMatrix> InstallationCostsParameter {
     55      get { return (LookupParameter<DoubleMatrix>)Parameters["InstallationCosts"]; }
     56    }
     57    public LookupParameter<DoubleArray> DemandsParameter {
     58      get { return (LookupParameter<DoubleArray>)Parameters["Demands"]; }
     59    }
     60    public LookupParameter<DoubleArray> CapacitiesParameter {
     61      get { return (LookupParameter<DoubleArray>)Parameters["Capacities"]; }
     62    }
     63    public LookupParameter<DoubleValue> TransportationCostsParameter {
     64      get { return (LookupParameter<DoubleValue>)Parameters["TransportationCosts"]; }
     65    }
     66    public LookupParameter<DoubleValue> OverbookedCapacityPenaltyParameter {
     67      get { return (LookupParameter<DoubleValue>)Parameters["OverbookedCapacityPenalty"]; }
     68    }
    5369    public ScopeTreeLookupParameter<IntegerVector> AssignmentParameter {
    5470      get { return (ScopeTreeLookupParameter<IntegerVector>)Parameters["Assignment"]; }
    … …  
    5672    public ScopeTreeLookupParameter<DoubleValue> QualityParameter {
    5773      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Quality"]; }
     74    }
     75    public ScopeTreeLookupParameter<DoubleValue> FlowDistanceQualityParameter {
     76      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["FlowDistanceQuality"]; }
     77    }
     78    public ScopeTreeLookupParameter<DoubleValue> InstallationQualityParameter {
     79      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["InstallationQuality"]; }
     80    }
     81    public ScopeTreeLookupParameter<DoubleValue> OverbookedCapacityParameter {
     82      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["OverbookedCapacity"]; }
    5883    }
    5984    public LookupParameter<GQAPAssignment> BestSolutionParameter {
    … …  
    86111      Parameters.Add(new LookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem."));
    87112      Parameters.Add(new LookupParameter<DoubleMatrix>("Distances", "The distances between the locations."));
    88       Parameters.Add(new LookupParameter<DoubleMatrix>("Weights", "The weights between the facilities."));
     113      Parameters.Add(new LookupParameter<DoubleMatrix>("Weights", "The weights between the equipments."));
     114      Parameters.Add(new LookupParameter<DoubleMatrix>("InstallationCosts", "The cost of installing equipment x at location y."));
     115      Parameters.Add(new LookupParameter<DoubleArray>("Demands", "The demands of the equipments."));
     116      Parameters.Add(new LookupParameter<DoubleArray>("Capacities", "The capacities at the locations."));
     117      Parameters.Add(new LookupParameter<DoubleValue>("TransportationCosts", "The transportation cost represents the flow-unit per distance-unit cost factor. This value can also be set to 1 if these costs are factored into the weights matrix already."));
     118      Parameters.Add(new LookupParameter<DoubleValue>("OverbookedCapacityPenalty", "The multiplier for the constraint violation when added to the quality."));
    89119      Parameters.Add(new ScopeTreeLookupParameter<IntegerVector>("Assignment", "The GQAP solutions from which the best solution should be analyzed."));
    90120      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", "The qualities of the GQAP solutions which should be analyzed."));
     121      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("FlowDistanceQuality", "The flow-distance qualities of the GQAP solutions which should be analyzed."));
     122      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("InstallationQuality", "The installation qualities of the GQAP solutions which should be analyzed."));
     123      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("OverbookedCapacity", "The overbooked capacities of the GQAP solutions which should be analyzed."));
    91124      Parameters.Add(new LookupParameter<GQAPAssignment>("BestSolution", "The best GQAP solution."));
    92125      Parameters.Add(new ValueLookupParameter<ResultCollection>("Results", "The result collection where the best GQAP solution should be stored."));
    … …  
    109142
    110143    public override IOperation Apply() {
    111       DoubleMatrix distances = DistancesParameter.ActualValue;
    112       DoubleMatrix weights = WeightsParameter.ActualValue;
    113       ItemArray<IntegerVector> assignments = AssignmentParameter.ActualValue;
    114       ItemArray<DoubleValue> qualities = QualityParameter.ActualValue;
    115       ResultCollection results = ResultsParameter.ActualValue;
    116       bool max = MaximizationParameter.ActualValue.Value;
    117       DoubleValue bestKnownQuality = BestKnownQualityParameter.ActualValue;
    118 
    119       var sorted = qualities.Select((x, index) => new { index, x.Value }).OrderBy(x => x.Value).ToArray();
    120       if (max) sorted = sorted.Reverse().ToArray();
    121       int i = sorted.First().index;
    122 
    123       if (bestKnownQuality == null
    124           || max && qualities[i].Value > bestKnownQuality.Value
    125           || !max && qualities[i].Value < bestKnownQuality.Value) {
    126         // if there isn't a best-known quality or we improved the best-known quality we'll add the current solution as best-known
    127         BestKnownQualityParameter.ActualValue = new DoubleValue(qualities[i].Value);
    128         BestKnownSolutionParameter.ActualValue = (IntegerVector)assignments[i].Clone();
     144      var assignments = AssignmentParameter.ActualValue;
     145      var qualities = QualityParameter.ActualValue;
     146      var equipmentNames = EquipmentNamesParameter.ActualValue;
     147      var locationNames = LocationNamesParameter.ActualValue;
     148      var flowDistanceQualities = FlowDistanceQualityParameter.ActualValue;
     149      var installationQualities = InstallationQualityParameter.ActualValue;
     150      var overbookedCapacities = OverbookedCapacityParameter.ActualValue;
     151      var distances = DistancesParameter.ActualValue;
     152      var weights = WeightsParameter.ActualValue;
     153      var installationCosts = InstallationCostsParameter.ActualValue;
     154      var demands = DemandsParameter.ActualValue;
     155      var capacities = CapacitiesParameter.ActualValue;
     156      var transportationCosts = TransportationCostsParameter.ActualValue;
     157      var overbookedCapacityPenalty = OverbookedCapacityPenaltyParameter.ActualValue;
     158      var results = ResultsParameter.ActualValue;
     159      var maximization = MaximizationParameter.ActualValue.Value;
     160      var bestKnownQuality = BestKnownQualityParameter.ActualValue;
     161
     162      int bestIndex;
     163      var tmp = qualities.Select((x, index) => new { Index = index, Value = x.Value });
     164      if (maximization) bestIndex = tmp.SelectMax(x => x.Value).Index;
     165      else bestIndex = tmp.SelectMin(x => x.Value).Index;
     166
     167      if (bestKnownQuality == null || HasSolutionImproved(bestKnownQuality.Value, qualities[bestIndex].Value, maximization)) {
     168        BestKnownQualityParameter.ActualValue = new DoubleValue(qualities[bestIndex].Value);
     169        BestKnownSolutionParameter.ActualValue = (IntegerVector)assignments[bestIndex].Clone();
    129170      }
    130171
    131172      GQAPAssignment assignment = BestSolutionParameter.ActualValue;
    132173      if (assignment == null) {
    133         StringArray equipmentNames = EquipmentNamesParameter.ActualValue;
    134         StringArray locationNames = LocationNamesParameter.ActualValue;
    135         assignment = new GQAPAssignment(weights, (IntegerVector)assignments[i].Clone(), new DoubleValue(qualities[i].Value), equipmentNames, locationNames);
     174        assignment = new GQAPAssignment((IntegerVector)assignments[bestIndex].Clone(), (DoubleValue)qualities[bestIndex].Clone(),
     175          equipmentNames, locationNames, distances, weights, installationCosts, demands, capacities, transportationCosts,
     176          overbookedCapacityPenalty, flowDistanceQualities[bestIndex], installationQualities[bestIndex], overbookedCapacities[bestIndex]);
    136177        assignment.Distances = distances;
    137178        BestSolutionParameter.ActualValue = assignment;
    138179        results.Add(new Result("Best GQAP Solution", assignment));
    139180      } else {
    140         if (max && assignment.Quality.Value < qualities[i].Value ||
    141           !max && assignment.Quality.Value > qualities[i].Value) {
     181        if (HasSolutionImproved(assignment.Quality.Value, qualities[bestIndex].Value, maximization)) {
     182          assignment.Assignment = (IntegerVector)assignments[bestIndex].Clone();
     183          assignment.Quality = (DoubleValue)qualities[bestIndex].Clone();
     184          assignment.EquipmentNames = equipmentNames;
     185          assignment.LocationNames = locationNames;
    142186          assignment.Distances = distances;
    143187          assignment.Weights = weights;
    144           assignment.Assignment = (IntegerVector)assignments[i].Clone();
    145           assignment.Quality.Value = qualities[i].Value;
     188          assignment.InstallationCosts = installationCosts;
     189          assignment.Demands = demands;
     190          assignment.Capacities = capacities;
     191          assignment.TransportationCosts = transportationCosts;
     192          assignment.OverbookedCapacityPenalty = overbookedCapacityPenalty;
     193          assignment.FlowDistanceQuality = (DoubleValue)flowDistanceQualities[bestIndex].Clone();
     194          assignment.InstallationQuality = (DoubleValue)installationQualities[bestIndex].Clone();
     195          assignment.OverbookedCapacity = (DoubleValue)overbookedCapacities[bestIndex].Clone();
    146196        }
    147197      }
    … …  
    149199      return base.Apply();
    150200    }
     201
     202    private static bool HasSolutionImproved(double oldQuality, double quality, bool maximization) {
     203      return maximization && oldQuality < quality || !maximization && oldQuality > quality;
     204    }
    151205  }
    152206}

  • branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/GQAPAssignment.cs

    r7319 r7415  
    3333
    3434    [Storable]
     35    private IntegerVector assignment;
     36    public IntegerVector Assignment {
     37      get { return assignment; }
     38      set {
     39        bool changed = (assignment != value);
     40        assignment = value;
     41        if (changed) OnPropertyChanged("Assignment");
     42      }
     43    }
     44
     45    [Storable]
     46    private DoubleValue quality;
     47    public DoubleValue Quality {
     48      get { return quality; }
     49      set {
     50        bool changed = (quality != value);
     51        quality = value;
     52        if (changed) OnPropertyChanged("Quality");
     53      }
     54    }
     55
     56    [Storable]
     57    private StringArray equipmentNames;
     58    public StringArray EquipmentNames {
     59      get { return equipmentNames; }
     60      set {
     61        bool changed = (equipmentNames != value);
     62        equipmentNames = value;
     63        if (changed) OnPropertyChanged("EquipmentNames");
     64      }
     65    }
     66
     67    [Storable]
     68    private StringArray locationNames;
     69    public StringArray LocationNames {
     70      get { return locationNames; }
     71      set {
     72        bool changed = (locationNames != value);
     73        locationNames = value;
     74        if (changed) OnPropertyChanged("LocationNames");
     75      }
     76    }
     77
     78    [Storable]
    3579    private DoubleMatrix distances;
    3680    public DoubleMatrix Distances {
    … …  
    5599
    56100    [Storable]
    57     private IntegerVector assignment;
    58     public IntegerVector Assignment {
    59       get { return assignment; }
    60       set {
    61         bool changed = (assignment != value);
    62         assignment = value;
    63         if (changed) OnPropertyChanged("Assignment");
    64       }
    65     }
    66 
    67     [Storable]
    68     private DoubleValue quality;
    69     public DoubleValue Quality {
    70       get { return quality; }
    71       set {
    72         bool changed = (quality != value);
    73         quality = value;
    74         if (changed) OnPropertyChanged("Quality");
    75       }
    76     }
    77 
    78     [Storable]
    79     private StringArray equipmentNames;
    80     public StringArray EquipmentNames {
    81       get { return equipmentNames; }
    82       set {
    83         bool changed = (equipmentNames != value);
    84         equipmentNames = value;
    85         if (changed) OnPropertyChanged("EquipmentNames");
    86       }
    87     }
    88 
    89     [Storable]
    90     private StringArray locationNames;
    91     public StringArray LocationNames {
    92       get { return locationNames; }
    93       set {
    94         bool changed = (locationNames != value);
    95         locationNames = value;
    96         if (changed) OnPropertyChanged("LocationNames");
     101    private DoubleMatrix installationCosts;
     102    public DoubleMatrix InstallationCosts {
     103      get { return installationCosts; }
     104      set {
     105        bool changed = (installationCosts != value);
     106        installationCosts = value;
     107        if (changed) OnPropertyChanged("InstallationCosts");
     108      }
     109    }
     110
     111    [Storable]
     112    private DoubleArray demands;
     113    public DoubleArray Demands {
     114      get { return demands; }
     115      set {
     116        bool changed = (demands != value);
     117        demands = value;
     118        if (changed) OnPropertyChanged("Demands");
     119      }
     120    }
     121
     122    [Storable]
     123    private DoubleArray capacities;
     124    public DoubleArray Capacities {
     125      get { return capacities; }
     126      set {
     127        bool changed = (capacities != value);
     128        capacities = value;
     129        if (changed) OnPropertyChanged("Capacities");
     130      }
     131    }
     132
     133    [Storable]
     134    private DoubleValue transportationCosts;
     135    public DoubleValue TransportationCosts {
     136      get { return transportationCosts; }
     137      set {
     138        bool changed = (transportationCosts != value);
     139        transportationCosts = value;
     140        if (changed) OnPropertyChanged("TransportationCosts");
     141      }
     142    }
     143
     144    [Storable]
     145    private DoubleValue overbookedCapacityPenalty;
     146    public DoubleValue OverbookedCapacityPenalty {
     147      get { return overbookedCapacityPenalty; }
     148      set {
     149        bool changed = (overbookedCapacityPenalty != value);
     150        overbookedCapacityPenalty = value;
     151        if (changed) OnPropertyChanged("OverbookedCapacityPenalty");
     152      }
     153    }
     154
     155    [Storable]
     156    private DoubleValue flowDistanceQuality;
     157    public DoubleValue FlowDistanceQuality {
     158      get { return flowDistanceQuality; }
     159      set {
     160        bool changed = (flowDistanceQuality != value);
     161        flowDistanceQuality = value;
     162        if (changed) OnPropertyChanged("FlowDistanceQuality");
     163      }
     164    }
     165
     166    [Storable]
     167    private DoubleValue installationQuality;
     168    public DoubleValue InstallationQuality {
     169      get { return installationQuality; }
     170      set {
     171        bool changed = (installationQuality != value);
     172        installationQuality = value;
     173        if (changed) OnPropertyChanged("InstallationQuality");
     174      }
     175    }
     176
     177    [Storable]
     178    private DoubleValue overbookedCapacity;
     179    public DoubleValue OverbookedCapacity {
     180      get { return overbookedCapacity; }
     181      set {
     182        bool changed = (overbookedCapacity != value);
     183        overbookedCapacity = value;
     184        if (changed) OnPropertyChanged("OverbookedCapacity");
    97185      }
    98186    }
    … …  
    102190    private GQAPAssignment(GQAPAssignment original, Cloner cloner)
    103191      : base(original, cloner) {
    104       distances = cloner.Clone(original.distances);
    105       weights = cloner.Clone(original.weights);
    106192      assignment = cloner.Clone(original.assignment);
    107193      quality = cloner.Clone(original.quality);
    108194      equipmentNames = cloner.Clone(original.equipmentNames);
    109195      locationNames = cloner.Clone(original.locationNames);
    110     }
    111     public GQAPAssignment(DoubleMatrix weights, IntegerVector assignment) {
    112       this.weights = weights;
     196      distances = cloner.Clone(original.distances);
     197      weights = cloner.Clone(original.weights);
     198      installationCosts = cloner.Clone(original.installationCosts);
     199      demands = cloner.Clone(original.demands);
     200      capacities = cloner.Clone(original.capacities);
     201      transportationCosts = cloner.Clone(original.transportationCosts);
     202      overbookedCapacityPenalty = cloner.Clone(original.overbookedCapacityPenalty);
     203      flowDistanceQuality = cloner.Clone(original.flowDistanceQuality);
     204      installationQuality = cloner.Clone(original.installationQuality);
     205      overbookedCapacity = cloner.Clone(original.overbookedCapacity);
     206    }
     207    public GQAPAssignment(IntegerVector assignment, DoubleValue quality)
     208      : base() {
    113209      this.assignment = assignment;
    114     }
    115     public GQAPAssignment(DoubleMatrix weights, IntegerVector assignment, DoubleValue quality)
    116       : this(weights, assignment) {
    117210      this.quality = quality;
    118211    }
    119     public GQAPAssignment(DoubleMatrix weights, IntegerVector assignment, DoubleValue quality, StringArray equipmentNames, StringArray locationNames)
    120       : this(weights, assignment, quality) {
     212    public GQAPAssignment(IntegerVector assignment, DoubleValue quality, StringArray equipmentNames, StringArray locationNames)
     213      : this(assignment, quality) {
    121214      this.equipmentNames = equipmentNames;
    122215      this.locationNames = locationNames;
     216    }
     217    public GQAPAssignment(IntegerVector assignment, DoubleValue quality, StringArray equipmentNames, StringArray locationNames,
     218      DoubleMatrix distances, DoubleMatrix weights, DoubleMatrix installationCosts, DoubleArray demands, DoubleArray capacities,
     219      DoubleValue transportationCosts, DoubleValue overbookedCapacityPenalty, DoubleValue flowDistanceQuality,
     220      DoubleValue installationQuality, DoubleValue overbookedCapacity)
     221      : this(assignment, quality, equipmentNames, locationNames) {
     222      this.distances = distances;
     223      this.weights = weights;
     224      this.installationCosts = installationCosts;
     225      this.demands = demands;
     226      this.capacities = capacities;
     227      this.transportationCosts = transportationCosts;
     228      this.overbookedCapacityPenalty = overbookedCapacityPenalty;
     229      this.flowDistanceQuality = flowDistanceQuality;
     230      this.installationQuality = installationQuality;
     231      this.overbookedCapacity = overbookedCapacity;
    123232    }
    124233

  • branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/GeneralizedQuadraticAssignmentProblem.cs

    r7413 r7415  
    6868      get { return (OptionalValueParameter<IItem>)Parameters["BestKnownSolution"]; }
    6969    }
     70    public OptionalValueParameter<StringArray> EquipmentNamesParameter {
     71      get { return (OptionalValueParameter<StringArray>)Parameters["EquipmentNames"]; }
     72    }
     73    public OptionalValueParameter<StringArray> LocationNamesParameter {
     74      get { return (OptionalValueParameter<StringArray>)Parameters["LocationNames"]; }
     75    }
    7076    #endregion
    7177
    … …  
    99105      set { TransportationCostsParameter.Value.Value = value; }
    100106    }
     107    public StringArray EquipmentNames {
     108      get { return EquipmentNamesParameter.Value; }
     109      set { EquipmentNamesParameter.Value = value; }
     110    }
     111    public StringArray LocationNames {
     112      get { return LocationNamesParameter.Value; }
     113      set { LocationNamesParameter.Value = value; }
     114    }
    101115    #endregion
    102116
    103     [Storable]
    104     private BestGQAPSolutionAnalyzer bestSolutionAnalyzer;
    105117    public BestGQAPSolutionAnalyzer BestSolutionAnalyzer {
    106       get { return bestSolutionAnalyzer; }
    107       set { bestSolutionAnalyzer = value; }
     118      get { return Operators.OfType<BestGQAPSolutionAnalyzer>().First(); }
    108119    }
    109120
    … …  
    112123    private GeneralizedQuadraticAssignmentProblem(GeneralizedQuadraticAssignmentProblem original, Cloner cloner)
    113124      : base(original, cloner) {
    114       bestSolutionAnalyzer = cloner.Clone(original.bestSolutionAnalyzer);
    115125      AttachEventHandlers();
    116126    }
    … …  
    201211
    202212    private void InitializeOperators() {
     213      Operators.Add(new BestGQAPSolutionAnalyzer());
     214      Operators.AddRange(ApplicationManager.Manager.GetInstances<IGQAPOperator>());
    203215      Operators.AddRange(ApplicationManager.Manager.GetInstances<IIntegerVectorOperator>());
    204       Operators.AddRange(ApplicationManager.Manager.GetInstances<IGQAPOperator>());
    205216      Operators.RemoveAll(x => x is ISingleObjectiveMoveEvaluator);
    206217      Operators.AddRange(ApplicationManager.Manager.GetInstances<IGQAPMoveEvaluator>());
    207       Operators.Add(new BestGQAPSolutionAnalyzer());
    208218      Parameterize();
    209219    }
    … …  
    276286
    277287      if (BestSolutionAnalyzer != null) {
    278         BestSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
     288        BestSolutionAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
    279289        BestSolutionAnalyzer.DistancesParameter.ActualName = DistancesParameter.Name;
    280290        BestSolutionAnalyzer.WeightsParameter.ActualName = WeightsParameter.Name;
     291        BestSolutionAnalyzer.InstallationCostsParameter.ActualName = InstallationCostsParameter.Name;
     292        BestSolutionAnalyzer.DemandsParameter.ActualName = DemandsParameter.Name;
     293        BestSolutionAnalyzer.CapacitiesParameter.ActualName = CapacitiesParameter.Name;
     294        BestSolutionAnalyzer.TransportationCostsParameter.ActualName = TransportationCostsParameter.Name;
     295        BestSolutionAnalyzer.OverbookedCapacityPenaltyParameter.ActualName = OverbookedCapacityPenaltyParameter.Name;
    281296        BestSolutionAnalyzer.AssignmentParameter.ActualName = SolutionCreator.AssignmentParameter.ActualName;
     297        BestSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
     298        BestSolutionAnalyzer.FlowDistanceQualityParameter.ActualName = Evaluator.FlowDistanceQualityParameter.ActualName;
     299        BestSolutionAnalyzer.InstallationQualityParameter.ActualName = Evaluator.InstallationQualityParameter.ActualName;
     300        BestSolutionAnalyzer.OverbookedCapacityParameter.ActualName = Evaluator.OverbookedCapacityParameter.ActualName;
    282301        BestSolutionAnalyzer.ResultsParameter.ActualName = "Results";
    283302        BestSolutionAnalyzer.BestKnownQualityParameter.ActualName = BestKnownQualityParameter.Name;
    284         BestSolutionAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
     303        BestSolutionAnalyzer.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
     304        BestSolutionAnalyzer.EquipmentNamesParameter.ActualName = EquipmentNamesParameter.Name;
     305        BestSolutionAnalyzer.LocationNamesParameter.ActualName = LocationNamesParameter.Name;
    285306      }
    286307    }

  • branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/GreedyRandomizedSolutionCreator.cs

    r7412 r7415  
    6060      while (tries < maxTries) {
    6161        assignment.Clear();
    62         capacities.Select((v, i) => slack[i] = v).Enumerate();
     62        slack = capacities.Select((v, i) => new { Index = i, Value = v }).ToDictionary(x => x.Index, y => y.Value);
    6363        HashSet<int> CF = new HashSet<int>(), // set of chosen facilities / equipments
    6464          T = new HashSet<int>(), // set of facilities / equpiments that can be assigned to the set of chosen locations (CL)
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