A digital twin is an accurate digital replica of a real-world object, process or system. It is created by using digital technologies such as software, sensors and simulation. The digital twin provides a complete representation of the real-world object.

In the BIM process, the digital twin is used to manage detailed information of a building or system, including information on shape, size, materials, construction methods, etc. Moreover, it can be used to analyze important information on the performance and cost of the project, helping designers and project managers to make accurate and effective decisions.