4D BIM adds a new dimension (time) to BIM Models, it enables a sequence of events to be depicted visually on a time line that has been populated by a BIM Models schedules often used in project management.Complex site logistics and installation phasing are some of many potential applications for visualization. Graphic representations, created to understand time-based processes, helps foresee conflicts and study potential solutions. 4D adds the time factor of the construction schedule to the BIM Models. We can directly link each activity of a Gantt chart (generated in project management software such as Primavera or Microsoft Project) to the BIM.
These animated models represent the planned construction sequence set against time. The main purpose of a construction phasing simulation is to provide a tool that will help the construction team visualize logistical issues or inefficiencies. The simulation exposes details such as out-of-sequence work, scheduling conflicts between multiple trades, “what if” scenarios, and macro-level construction phasing strategies – all in order to achieve the optimization of the construction schedule.