Creating a timetable can be a stressful task. For instance, are you able to remember forbidden positions for class, teacher, room or subject? Do you have an eye to spot the same subject appearing on consequent days or even the same day!? Are you sure that all teachers and classes have an allowed number of lessons and windows in your timetable? Do you have too many hard or too many easy subjects in one day? Are all rooms properly scheduled without conflicts? Is your timetable more or less valid when you reschedule a lesson? The questions and doubts go on and on. With Prime Timetable you can solve all these problems by utilizing excellent validation tools that will assist you all the way: instant validation and validation markers are a perfect fit for the timetabling job. Read on!
It takes only one click on validate icon 
to turn on instant validation. That means you get an instant validation feedback upon any timetable change. Just drag & drop any card or start the automatic generator to see the validation results immediately! You can even drag & drop cards in extra view, use undo/redo, change time requests or timetable data, open another timetable or do just about anything and still get instant validation feedback.
If there are no validation errors and warnings, the timetable is valid and you're good to go. Otherwise, the validation results window will list all timetable imperfections grouped and sorted logically and if you click any of them you will get markers displayed in the view.
Validation markers are red blinking rectangles surrounding problematic period(s) in the timetable view. Since they are transparent you can still easily spot and drag problematic cards to a better position.
Some validation errors are more easily understood in another timetable view, e.g. teacher conflict can be spotted only in the teacher view. Our software will automatically change the main timetable view into teacher view and scroll to that validation conflict. If the extra teacher view is already open, it will be used for teacher conflicts leaving the main view as it is.