For High Tolerance floor surface regularity needs to be limited in two ways. The floor should have an appropriate flatness in order to limit the bumpiness and general stability in operation of the materials handling equipment, and an appropriate levelness to ensure that the building as a whole with all its static and mobile equipment can function satisfactorily. There are essentially two methods for defining floor flatness requirements. Floors are divided into Free Movement Areas (FM) and Defined Movement Areas (DM).