ABSTRACT

In a construction project, a 4D CAD simulates the process of transforming space over time and reflects the four-dimensional nature of construction activities. The development of 4D CAD involves the linking of a 3D graphic model or BIM model to a construction schedule. This integration process takes a 4D CAD model, which represents the product model (the design of a building/facility), and graphically incorporates the information traditionally represented in the construction schedule.