Think Paperless. Think how to solve the current people in queue method with paperless solutions.
Visitor can create the token number by his/her mobile phone. Realtime data will be synchronised with animation and let visitors have better experience and responsive.
If the visitor does not show up when onQueue, the BIZ people can make a phone call to the visitor.
This tablet app is working together with Paperless QMS
https://play.google.com/store/apps/details?id=com.wheref.queuemsclient
https://play.google.com/store/apps/details?id=com.wheref.queuemsadmin
https://play.google.com/store/apps/details?id=com.wheref.queuemsboard