Prevent a single user from being logged in on multiple devices at once.
If someone forgets to sign out and then signs in on another device then someone else can end up processing under their user name. Ruining performance statistics and error traceability.
Also if two pack desks and print tools are logged in under the same user then the wrong paper work can potentially be printed out at the the wrong pack station.
It seems illogical that the default would be to allow a user log in multiple times
