Queueing Network — Passport Office Counter
Public counter handling 74 applicants an hour, where a two-desk supervisor referral room with only six places blocks more than a quarter of the people sent to it and quietly sheds them from the network.
Make it your own.
title "Passport office — public counter"
target 85%
arrivals "Ticket kiosk" 74/h
station "Ticket kiosk" { servers: 2; service: 50s }
station "Document check" { servers: 10; service: 6m; capacity: 40 }
station "Biometrics booth" { servers: 7; service: 4m30s }
station "Payment + issue" { servers: 10; service: 7m }
# Only six people fit in the supervisor's room, desks included. Anyone who
# cannot get in is turned away and told to come back — a real loss.
station "Supervisor referral" { servers: 2; service: 18m; capacity: 6 }
route "Ticket kiosk" -> "Document check" 1.0
route "Document check" -> "Biometrics booth" 0.89
route "Document check" -> "Supervisor referral" 0.11
route "Biometrics booth" -> "Payment + issue" 1.0
route "Payment + issue" -> exit 1.0
route "Supervisor referral" -> "Document check" 0.6 # cleared, rejoin the queue
route "Supervisor referral" -> exit 0.4