What is 4D BIM and 5D BIM?
We all know that the term 3D represents ‘3 Dimensions’ in regards to what is often called the ‘X, Y and Z’ axis. We live in a 3D world and in 3D visualization we try to represent this world as accurately as possible by building objects virtually the same way they exist naturally.
But more and more I am hearing the terms 4D and 5D, especially in reference to BIM (Building Information Modeling). While these terms might be familiar to you, they aren’t familiar to everyone. Still, this will probably be a short post.
In the world we live in 3D isn’t completely accurate because things are always changing. Time is often considered this 4th dimension and in BIM, applying a time in the form of a schedule can add that 4th dimension virtually, just like we experience in real life.
At some point, designers and project managers didn’t have enough information in their 4D models, so they added a 5th dimension, cost. Now, if you have a 3D BIM model that has a schedule applied to it and then you additionally attach the project cost estimate, you are dealing with a 5D BIM model.
The Definition of 4D BIM
“4D BIM is the association of 3D BIM models with time in the form of a schedule.”
The Definition of 5D BIM
“5D BIM is applying a project cost estimate to a model, usually after the project schedule has been associated with the virtual model.”
Any additional thoughts on these terms?