What is 4D Scheduling? Hainline is proud to be at the leading edge of technology in our fields of expertise. New technology and tools give our clients an advantage in an ever-advancing and fast-paced environment. Among these advancements is 4D scheduling. Using information from Revit or other 3D modelling software, each object in the building model is tied to a schedule activity. 4D scheduling merges the visual power of a building model with the scheduling element of time (4D