Extending the different possibilities, planned reception by appointment and remotely rank allocation on or through Short Message Service can also be included. A more rudimentary (or in some cases, supplementary) manual element to structured queue management involves the addition of a member of human staff to deliver a system, monitoring structured queue lengths in order to guide people in a queue or to make adjustments to speed up service (e.g. fetching more cashiers). Such systems are used in UK supermarkets, for example, where the addition of a 'host' role or Customer Service Manager may occur.