Before you can begin calculating schedules, you have to enter in the shifts, that you wish to have available, when defining the constraints and requirements of a schedule. If you haven't yet entered in any shifts, the shifts table will be empty. You can start adding a new shift by pressing the "+" button.
A shift can either be continuous from start to finish or it can be interrupted once in between.
Shift fields:
The Submit button adds the shift to the database.
Upon adding a new shift, you will be sent back to the shifts page, where the new shift will have been added to the table. In the last column of the shift, you should see two buttons.
Editing shifts can cause inconsistency in existing schedules, which contain the modified shift.
Instead of editing shifts, open a new one with the same name, but with different time and deactivate the old one. This way, no inconsistency will occur.