Scheduling and 4D Simulation

BIM for Architecture, Engineering, and Construction Curriculum

Key Terms

The following key terms were used in this lesson:


Activities that appear in the project schedule. These activities can include construction, demolition, or temporary operations.

4D Simulation

A simulation of a construction process that maps model elements to schedule tasks, adding the fourth dimension of time to a 3D model.

Time-based Clash

A clash occurring when two static model elements occupy the same space at a specific time in the project schedule.

Soft Clash

A clash occurring when two moving objects collide.

Time-based Soft Clash

A clash occurring when the appearance or disappearance of static objects obstructs the movement of animated objects on the site.