ABSTRACT
The integration of time with 3D spatial data permits the simulation of the dynamic work environments found on construction projects. 4D modeling provides a mechanism to simulate building elements and work spaces in a manner much more appropriate than traditional static layout plans and schedules. The benefits of 4D modeling
have been demonstrated through experimentation, and include the identification of potential conflicts between building elements and work spaces, safety hazards created due to proximity of construction activities, and the visualization of construction plans by crews (McKinney & Fischer, 1998). This paper is divided into two sections: Part One, which focuses on the planning process and potential benefits of 4D modeling to production planning; and Part Two, which focuses on modeling issues and the implementation challenges of 4D modeling for production planning. As a guide to the reader, each part is briefly introduced.
