4D Scheduling is the process of adding schedule data to the 3D model and simulating the construction sequence. This process helps reduce errors by engaging the team in an environment where they can visualize complex scenarios and sequences. We have found that 4D review is an effective tool for finding scopes of work and areas that are absent from the detailed construction schedule. The process of linking the schedule to the model highlights the elements not within the schedule and directs our team to creative solutions we might not have otherwise found.? Any schedule changes can be quickly reviewed by simulating that portion of the schedule in the model.