org.cpsolver.coursett.heuristics

Class TimetableComparator

java.lang.Object

org.cpsolver.ifs.solution.GeneralSolutionComparator<Lecture,Placement>

org.cpsolver.coursett.heuristics.TimetableComparator

All Implemented Interfaces:

SolutionComparator<Lecture,Placement>

Deprecated.

@Deprecated
public class TimetableComparator
extends GeneralSolutionComparator<Lecture,Placement>

Timetable (solution) comparator.

The quality of a solution is expressed as a weighted sum combining soft time and classroom preferences, satisfied soft group constrains and the total number of student conflicts. This allows us to express the importance of different types of soft constraints.

The solution comparator prefers a more complete solution (with a smaller number of unassigned variables) and a solution with a smaller number of perturbations among solutions with the same number of unassigned variables. If both solutions have the same number of unassigned variables and perturbations, the solution of better quality is selected.

Parameters:

Related Solver Parameters

Parameter	Type	Comment
Comparator.HardStudentConflictWeight	Double	Weight of hard student conflict (conflict between single-section classes)
Comparator.StudentConflictWeight	Double	Weight of student conflict
Comparator.TimePreferenceWeight	Double	Time preferences weight
Comparator.ContrPreferenceWeight	Double	Group constraint preferences weight
Comparator.RoomPreferenceWeight	Double	Room preferences weight
Comparator.UselessSlotWeight	Double	Useless slots weight
Comparator.TooBigRoomWeight	Double	Too big room weight
Comparator.DistanceInstructorPreferenceWeight	Double	Distance (of the rooms of the back-to-back classes) based instructor preferences weight
Comparator.PerturbationPenaltyWeight	Double	Perturbation penalty (see UniversalPerturbationsCounter)
Comparator.DeptSpreadPenaltyWeight	Double	Department balancing penalty (see DepartmentSpreadConstraint)

Version:

CourseTT 1.3 (University Course Timetabling)
Copyright (C) 2006 - 2014 Tomáš Müller
muller@unitime.org
http://muller.unitime.org

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This library 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not see http://www.gnu.org/licenses/.

Author:

Tomáš Müller

Constructor Summary

Constructors

Constructor and Description
TimetableComparator(DataProperties properties) Deprecated.

Method Summary

Modifier and Type	Method and Description
double	currentValue(Solution<Lecture,Placement> currentSolution) Deprecated.
double	getBest(Solution<Lecture,Placement> currentSolution) Deprecated.

Methods inherited from class org.cpsolver.ifs.solution.GeneralSolutionComparator

isBetterThanBestSolution

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimetableComparator

public TimetableComparator(DataProperties properties)

Deprecated.

Method Detail

currentValue

@Deprecated
public double currentValue(Solution<Lecture,Placement> currentSolution)

Deprecated.

Use Model.getTotalValue() instead.

Parameters:

currentSolution - current solution

Returns:

current value

getBest

@Deprecated
public double getBest(Solution<Lecture,Placement> currentSolution)

Deprecated.

Use Solution.getBestValue() instead.

Parameters:

currentSolution - current solution

Returns:

best value