Retrial queueing systems represent a class of models in which arriving customers, upon encountering a busy or unavailable server, enter a virtual waiting room—commonly referred to as an orbit—to ...

Retrial queueing systems represent a specialised branch of queueing theory where customers, upon encountering a busy server, do not simply abandon the process but instead join an external queue or ...

Sainsbury’s has rolled out its virtual queueing system to 42 further stores in a bid to minimise the wait outside of branches under its coronavirus safety protocols. A total of 55 stores will now use ...

It is proved that, for a large class of stable stationary queueing systems with renewal arrival processes and without losses, a necessary condition for the departure process also to be a renewal ...

Single-server-single-queue-FIFO-discipline queueing systems are considered in which at most a finite number of customers N can be present in the system. Service and arrivai rates are taken to be ...

NS&I, the state-backed savings company, well known for its Premium Bonds savings method, has introduced a virtual queueing system for its online services, surprising many users accessing the website.

The John Lewis Partnership is trialling a virtual queueing system at six Waitrose supermarkets and three John Lewis branches. The scheme is designed to eliminate physical queues and manage the flow of ...

SAINSBURY’S and Asda have rolled out virtual queuing systems to more stores so shoppers don’t have to wait outside. The nifty set-up sees customers join the line through an app or by taking a picture ...

Earlier this month supermarket giants Tesco and Asda revealed plans for new systems in a bid to reduce queuing times outside their stores. Since lockdown was imposed in March, supermarkets brought in ...

Aldi is introducing an automated traffic light queueing system to control the number of customers in its stores. The budget supermarket is launching the new technology in select stores this week ...