4D Simulation is a tool that combines the 3D model with the project schedule during Create, Realise and Enhance phases. This allows stakeholders to visualise the construction phase in a virtual environment to realise opportunities to enhance construction sequencing.

4D Simulation (3D + Time) is a process that links 3D objects from the model with construction schedule activities providing an integrated visualisation of scope, time frame and location of the activity at the same time in a virtual environment, removing the need to refer to the 2D drawings and other documents.

4D Simulation reduces the time required to review and challenge the schedule by providing a dynamic visualisation of any spatial or sequence constraints in the construction schedule, thus enhancing communication and coordination between all disciplines to reduce missing activities.

4D simulation benefits include:

• » Execution risk reduction
• » Optimised construction schedules  
• » Construction cost reduction
• » Visualisations for stakeholder engagement