This function allows you to specify the extent of the software’s "pre-calculation function" for each optimisation run. Like a chess game programme, the Untis programme calculates before each "move" (i.e. before each placement of a lesson) how the move will affect the situation as a whole. Depending on the computer, the size of the school and the figure entered for this option, the optimisation of a timetable can take between a few seconds and a few minutes. As a general rule, the longer it takes the computer to arrive at a result, the better the final outcome. In the early stages of a timetable construction, however, long optimisation runs are often counter-productive since initial results often indicate that certain changes need to be made to the input data.

Further input options can be found on the right hand side of the control data window: