The debate between mechanised and manual cleaning is usually framed as a cost question. It is more accurately a question of surface area, surface type and frequency. Mechanisation wins decisively on large uninterrupted hard floors. A walk-behind scrubber-drier covers roughly 1,800 to 2,500 square metres per hour. Manual mopping covers 250 to 350. For an atrium, a concourse, a warehouse floor or a mall corridor, the arithmetic is not close. Manual methods remain superior wherever geometry interferes. Staircases, edges, corners, restroom fixtures, furniture, glass partitions below reach height and any surface requiring judgement about what is dirt and what is damage. A machine cannot distinguish between a stain and a surface defect. The practical model is hybrid. Mechanised equipment handles open areas on a defined cycle. Trained manual teams handle detail work, edges and touchpoints on a higher frequency. Microfibre systems handle dust capture, since dry dusting with cotton simply redistributes particles. The common error is purchasing equipment without purchasing training. A ride-on scrubber operated at the wrong pad pressure with the wrong chemical dilution will damage marble within weeks. Equipment utilisation below 40% usually indicates a training gap rather than an over-purchase. The second common error is mechanising in buildings where corridor widths, lift dimensions or floor loading make the equipment impractical. A site survey before procurement prevents expensive machinery from sitting in a store room.