Conveyors are used when materials is usually to be moved frequently between particular points over a fixed path and when there exists a sufficient flow quantity to justify the fixed conveyor purchase.[4] Different types of conveyors can be characterized by the type of product being handled: unit load or mass load; the conveyor’s area: 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 units move at the same time on conveyors without accumulation capacity.[5] For instance, while both the roller and flat-belt are unit-load on-floor conveyors, the roller provides accumulation capability as 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 include the magnetic-belt, troughed-belt, bucket, and screw conveyors. A sortation conveyor program is utilized for merging, identifying, inducting, and separating items to be conveyed to specific destinations, and typically consists of flat-belt, roller, and chute conveyor segments together with planetary gearbox various moveable hands and/or pop-up tires and chains that deflect, push, or pull products to different destinations.[6]