Timetables for the components are called feasible if they do not contain any conflicting lectures. There cannot be any pair of courses having the same component in their collections which have occupied the same slot in some of the timetables. Timetables which are not feasible have conflicts or clashes, and they can be automatically removed in the selection Tools|Remove conflicts. This tool enables also to view conflicts without removing them and it copies all conflicts onto the Clipboard. Conflicting timetables are not normally allowed in Mimosa, but they can be created only by special actions. For instance, user can in remove checking for conflicts in case of some components, and permitting of this kind of overlaps in schedules is sometimes mandatory.
Mimosa works in a preventive fashion and it automatically prevents users from creating conflicts in timetables and when timetables are created manually, it also displays available options and enables to clear slots from other timetables to enable assignments in active timetable. Feasible timetables are also created with the help of initial solution, as described in Optimise.
Mimosa pre-checks all conflicts, and this approach may differ from other applications, which views and removes conflicts from timetables after the solution is created. It is also possible to create conflicts in timetables intentionally with special tricks, for instance in removing the Create timetables for selection from some or all categories in selection Options|Timetables.