Use this option to specify how many different timetables you want the software to construct per series. Each timetable is saved in a dedicated file (work x .gpn where x is the number of the file) in the active Untis directory (it is advisable, however, to enter a dedicated path for these work files on the "Directories" tab under "Settings | Miscellaneous"). Depending on the selected optimisation strategy (see the chapter "Strategies"), the programme will carry out further optimisation runs for the timetables.