Building Digital Twins market report. The aim of the report was to understand the needs of a wide range of stakeholders & how they can be solved by digital twins. The industry generally thinks that BIM is the key to delivering digital twins. However, BIM based twins are not expected to be a productive technology for at least 3-5 years. The good news is that, in the next 3-5 years, many of the identified stakeholder needs can be solved by simple digital twins like Empathic Building.