In the shop
When the ticket machine stopped working.

The situation
A shop handles several kinds of visits at once. When its paper ticket machine breaks, the queue loses its order and everyone waits near the counter.
The change
A stand-up QR poster takes the machine's place. Customers choose a service and enter their phone number. They receive a ticket by text and can follow the queue live on their phones. Staff call from their counter pages; a text tells each customer when to return.





