A neighbourhood repair clinic opens one help desk for three hours. Visitors arrive with small appliances and questions, but nobody has an appointment. The team uses one public queue so people can wait around the venue instead of blocking the desk.
One desk handles a changing walk-in flow
The queue is named “Repair clinic help desk.” A short note tells visitors to stay inside the community centre and keep their ticket page available.
The QR code is public and the operator link is private
A printed sign places the join QR code beside a copyable URL. The management link is bookmarked only on the volunteer tablet and a trusted backup phone.
A visitor joins without an account
Sam scans the sign, enters a familiar display name, and receives a private ticket. The page shows the ticket state while Sam waits nearby; it does not promise an exact service time or send an SMS.
The operator completes each state before calling again
The volunteer calls Sam, marks the visit served, and then calls the next ticket. New entry is paused during a short break, no-shows are marked explicitly, and the queue is closed when the clinic ends.