Patent ID: 8022955

Claim:
An operability verification apparatus having a main frame body section that performs operation, a display screen that displays an image, and a pointing device that is moved by user's hand and notifies the main frame body section of direction of movement and migration length, wherein the image of a three-dimensional model on data that represents an equipment as an object to be verified is displayed on the display screen, and an operability of the equipment is verified by a simulation, the operability verification apparatus comprising: a work plane generation section that generates a work plane formed of a horizontal plane which intersects the equipment as the object when the equipment is disposed in a real space, on a virtual space where the three-dimensional model is disposed; a plane display section where a two-dimensional image on the work plane generated in the work plane generation section of the three-dimensional model is displayed on the display screen; a display scale management section that manages a ratio of a display size of the equipment on the display screen to a real size of the equipment; and a mark display update section in which a mark representative of the pointing device is displayed on the display screen, and upon receipt of the notification of direction of movement and migration length of the pointing device, the mark on the display screen is moved in the direction of the movement corresponding to the direction of the movement of the pointing device by only a migration length in which the ratio is considered, the ratio being managed in the display scale management section, and a pseudo user table that describes body sizes of an operator who operates the pointing device and body sizes of a pseudo user assuming a user who uses the equipment, wherein the mark display update section moves the mark on the display screen by only a migration length in consideration of a difference in body sizes between the operator and the pseudo user as well as the ratio.