Solution Properties
 Created
 Date and time when the timetable was saved
 Settings
 The solver configuration with which the timetable was created (for example, Default, or Interactive  see the Notes section in the description of the Solver Configurations screen)
 Committed
 If this timetable has been committed, the date and time of that event is displayed
 Owner
 The solver group who saved this timetable (usually the department whose deputy saved the timetable)
 Assigned variables (Assign)
 The percentage of classes that got time and room (out of all loaded classes); if it is not 100%, the timetable is incomplete
 Overall solution value (Total)
 Value of the optimization function for this timetable; the value is based on criteria used to generate the timetable; the lower the better
 Note: You should not compare this value for two different timetables, even if created for the same set of data  the value is comparable only between different stages of solving one timetable
 Time preferences (Time)
 Percentage of time preferences met
 Student conflicts (Stud)
 Room preferences (Room)
 Percentage of room preferences met
 Distribution preferences (Distr)
 Percentage of distribution preferences met
 Backtoback instructor preferences (Instr)
 Percentage of back to back classes taught by the same instructor which are in rooms close enough for the instructor to walk from one to the other
 Too big rooms (TooBig)
 “Too big room” is a room that has at least 25% more seats than is necessary for the class that has been timetabled there. There are two limits for Too big rooms  25% and 50% more seats than necessary. Rooms exceeding the number of necessary seats by less than 25% are not penalized (penalty “0”), rooms exceeding the necessary seats by 25% to 50% are penalized by “1”, rooms with more than 50% more seats than necessary have penalty “4”. The number in parenthesis is the total penalty over all classes. The percentage can be interpreted as “0%  all classes are in rooms that do not have more than 125% of necessary seats, 100%  all classes are in rooms that have more than 150% of necessary seats”.
 Useless halfhours (Useless)
 Percentage of unused time slots (five minutes intervals) in all rooms that are hard to use for regular classes for one of the following reasons (each reason is represented by a number next to the percentage)
 The time slot is in a block between classes that is half an hour or shorter (with a class on either side)
 The time slot is in a part of a broken time pattern, i.e., it is on Tuesday at 9:05 while on Thursday 910:30am there is already a class  so a standard time pattern TR 9am10:30am cannot be used
 Perturbations: Total penalty (Pert)
 Only in the MPP configuration
 Penalty for changes made to a timetable after it was loaded from a saved solution
 Note
 A note about the timetable
 Editable once the timetable is selected (to select a timetable, click on its line in Saved Timetables)
Properties of a selected solution
 Created
 Time and date when the solution was created (saved)
 Owner
 Solver group which owns the solution
 Commited
 Information whether a solution is committed (it is either Not committed or it contains time and date when it was committed)
 Note
See properties of a loaded solution for the remaining properties
Properties of a loaded (current/best) solution
 Created
 Time and date when the solution was created
 Assigned variables
 Percentage of classes that have time and room assigned (the number of assigned classes / total number of classes is in brackets).
 Overall solution value
 Value of the objective function that is used by the solver to evaluate a solution. When comparing two solution (of the same solver group and loaded using the same solver configuration), the value with lower value is better. See Solver Configurations for details.
 Time preferences
 Overall satisfaction of time preferences expressed as percentage (100% all classes assigned in the best possible times, 0% all classes assigned in the worst possible times). The number next to the percentage is the sum of normalized time preferences of all assigned classes.
 Student conflicts
 Room preferences
 Overall satisfaction of room preferences expressed as percentage (100% all classes assigned in the best possible rooms, 0% all classes assigned in the worst possible rooms). The number next to the percentage is the sum of normalized room preferences of all assigned classes.
 Distribution preferences
 Overall satisfaction of distribution preferences expressed as percentage (100% all distribution preferences met, 0% no distribution preference met). The number next to the percentage is the sum of normalized distribution preferences.
 Backtoback instructor preferences
 Percentage of back to back classes taught by the same instructor which are in rooms close enough for the instructor to walk from one to the other. The number next to the percentage is the weighted number of back to back classes of the same instructor (the weights depend on the distance between the rooms)

Too big rooms

“Too big room” is a room that has at least 25% more seats than is necessary for the class that has been timetabled there. There are two limits for Too big rooms  25% and 50% more seats than necessary. Rooms exceeding the number of necessary seats by less than 25% are not penalized (penalty “0”), rooms exceeding the necessary seats by 25% to 50% are penalized by “1”, rooms with more than 50% more seats than necessary have penalty “4”. The number in parenthesis is the total penalty over all classes. The percentage can be interpreted as “0%  all classes are in rooms that do not have more than 125% of necessary seats, 100%  all classes are in rooms that have more than 150% of necessary seats”.
 Useless halfhours
 Percentage of unused time slots (five minutes intervals) in all rooms that are hard to use for regular classes for one of the following reasons (each reason is represented by a number next to the percentage)
 The time slot is in a block between classes that is half an hour or shorter (with a class on either side)
 The time slot is in a part of a broken time pattern, i.e., it is on Tuesday at 9:05 while on Thursday 910:30am there is already a class  so a standard time pattern TR 9am10:30am cannot be used
 Same subpart balancing penalty
 Penalty if the classes of a subpart are not distributed evenly over different parts of a day
 Calculated from number of hours that are used more than would be an average over available times
 Department balancing penalty
 Penalty if classes of a department are not distributed evenly over different parts of a day (to be fair to departments and not give one department all the 10am  2pm slots)
 Perturbation variables
 Only in MPP solver mode
 The number of classes that have a time or room assignment different from the one in the loaded timetable + the number of new variables that were not in the loaded timetable
 Perturbations: Total penalty
 Only in MPP solver mode
 Penalty for changes made to a timetable after it was loaded from a saved solution
 Time
 The time it took the solver to create this timetable
 Iteration
 Number of iterations performed to create this timetable

Memory usage

Memory allocated on the solver server where the instance is loaded

Speed
 Number of iterations per second