Conveyors are used when materials is to be moved frequently between specific points over a set path and when there is a sufficient flow volume to justify the fixed conveyor investment.[4] Various kinds of conveyors can be seen as a the kind of product being dealt with: unit load or mass load; the conveyor’s area: in-floor, on-flooring, or overhead, and whether or not loads can accumulate on the conveyor. Accumulation allows intermittent movement of every unit of material transported along the conveyor, while all products move concurrently on conveyors without accumulation capability.[5] For instance, while both roller and flat-belt are unit-load planetary gearbox on-floor conveyors, the roller provides accumulation capability while the flat-belt will not; similarly, both power-and-free and trolley are unit-load overhead conveyors, with the power-and-free designed to include a supplementary track in order to supply the accumulation capability without the trolley conveyor. Examples of bulk-handling conveyors are the magnetic-belt, troughed-belt, bucket, and screw conveyors. A sortation conveyor program is used for merging, determining, inducting, and separating products to end up being conveyed to particular destinations, and typically includes flat-belt, roller, and chute conveyor segments as well as various moveable arms and/or pop-up tires and chains that deflect, push, or pull products to different destinations.[6]