Building Information Modelling 建築信息模型 / 建築資訊模型

BIM = Building Information Modelling = Modelling of Information of Building = 3D graphical model + information.

CAD = Computer aided design.

Apart from the 3D graphical part implied by the term "model", the feature rich information part distinguishes BIM from CAD.

4D BIM = 3D graphical model & information + time information.

5D BIM = 4D BIM + cost information.

6D BIM = 5D BIM + facility management information.

QTO = quantity take-off = measurement of quantities.

Revit is one of BIM software.