source: branches/2521_ProblemRefactoring/HeuristicLab.Problems.Scheduling/3.3/Objectives/MeanTardiness.cs

#region License Information
/* HeuristicLab
 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Linq;
using HeuristicLab.Core;
using HeuristicLab.Encodings.ScheduleEncoding;

namespace HeuristicLab.Problems.Scheduling {
  public static class MeanTardiness {
    public static double Calculate(Schedule schedule, ItemList<Job> jobData) {
      return schedule.Resources
        .Select(r => Math.Max(0, r.Tasks.Last().EndTime - jobData[r.Tasks.Last().JobNr].DueDate))
        .Average();
    }
  }
}