Conveyors are used when materials is usually to be moved frequently between specific points over a set route and when there exists a sufficient flow volume to justify the fixed conveyor purchase.[4] Various kinds of conveyors can be characterized by the kind of product being managed: unit load or bulk load; the conveyor’s location: planetary gearbox in-floor, on-ground, or overhead, and whether or not loads can accumulate on the conveyor. Accumulation allows intermittent movement of each unit of material transported along the conveyor, while all products move simultaneously on conveyors without accumulation capability.[5] For example, while both the roller and flat-belt 
are unit-load on-floor conveyors, the roller provides accumulation capability while the flat-belt does not; similarly, both power-and-totally free and trolley are unit-load overhead conveyors, with the power-and-free made to include a supplementary track to be able to provide the accumulation capability without the trolley conveyor. Types of bulk-handling conveyors include the magnetic-belt, troughed-belt, bucket, and screw conveyors. A sortation conveyor program can be used for merging, identifying, inducting, and separating products to be conveyed to particular destinations, and typically includes flat-belt, roller, and chute conveyor segments as well as various moveable arms and/or pop-up wheels and chains that deflect, push, or pull products to different destinations.[6]
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