Similarities and differences in cycling server queueing models

This paper is an introduction to models of a group of cycling server queues. The systems examined arise in a wide range of applications; these include manufacturing and assembly, warehouses and storage facilities and computers and communication systems. The polling model, so important in communication networks, was first studied in a textile winding operation. In return, telecommunications system research has produced models of importance in manufacturing. The paper treats polling models, slotted ring models, work transporter models and AGV ring models and closes with a discussion of a Nissan ring model for treating part of a complex storage system for motor vehicles.