Production Routes are here to indicate where an Item must travel in order to be Produced.
Navigate to 'Production' > 'Maintenance' > 'Production Routes'.
Click the 'New Production Route' button at the top-left of the screen to create a new 'Production Route'.
All that is required is that you type in the 'Name' of the Route you wish to add.
Once you are happy with the 'Name' you can click 'Save' at the top-left of the screen to add the 'Production Route' to the system.