in UK supermarkets, for example, where the addition of a 'host' role or Customer Service Manager may occur. Unstructured queues Where people form a queue in unpredictable and varying locations and directions. This is often the case in some forms of retail, taxi queues, ATMs and at periods of high demand in many situations. In the busiest places, physical barriers and guides are used to funnel people into a line as they arrive. Mobile queue, virtual queue, and online queue Allowing customers to use their mobile phone to view real-time queue data and select a reason that they want to visit your service center. Customers are free to carry on their day and don't have to wait in a waiting area for too long. Customers can wait anywhere else while waiting for their turns. They can receive notifications via SMS, App or Emails informing them about theire turn and when ready to be seen, they are called forward for service. Mobile queues especially the online ones can also include real-time queue data statistics as well as real-time customer feedback. Qiwii.id is one example of queuing system that can provide real time data about queue and the estimation of waiting time. Mobile queues require the customer to install apps to their phone before getting into the queue. The time to install may extend the persons actual wait time for the first visit. There are many option of queuing app and not every business uses the same app, customers can end up with hundreds of apps on their device. The one stop app for many businesses and institutions could be a better option in customer point of view. Mobile queue app for single business/institution will only be beneficial for customers that visit the same place on a regular basis. Queue measurement and management techniques Various queue measurement and management techniques exist: Physical barrier They aimed at guiding queue formation and organizing it in the most efficient way. Signage and signaling systems Traditional queue management systems rely on customers of that business, entering the business and using a free-standing kiosk to select the reason for their visit. These type of systems use LCD screens to manage customers by way of indicating their wait time and place in the queue. These aim to provide information to people queuing to aid efficient queue formation and flow, as well as setting service expectations. Newer technologies such