An object management system, an aircraft design system, and a method for managing an object. A three-dimensional environment with a model of an object and an avatar representing a human operator from a viewpoint relative to the avatar is displayed on a display system. A motion of the human operator is detected. An interaction between the avatar and the model of the object is identified in real time using information about motions of the human operator that are detected in real time. The interaction changes a group of dimensions in the model of the object. Further, the interaction between the avatar and the model of the object in the three-dimensional environment is displayed on the display system, enabling design changes in the model of the object made by the human operator.