4D BIM - Acronym for 4D Building Information Modeling and the term widely used in the CAD industry, relates to the intelligent linking of specific 3D CAD components or time or schedule information assemblies. The use of 4D refers to the fourth dimension: time, ie 4D is 3D plus schedule (time).

Building a 4D model enables different participants (from architects, designers, contractor to clients) to the construction project to visualize the entire duration of a series of events and to show the progress of construction activities throughout the project. This BIM-centric approach to project management techniques has very high potential for improving project management and delivery of any size or complexity of construction projects.