output can be examined to improve projects in the future and even improve building operations management. (CRL, 2018) Adding to that, BIM offer 4D as Time, 5D as Cost and 6D as-built operation. In other words, BIM is not a simple geometry. It takes additional features into accounts, such as light analysis, spatial relations, and geographic details, as well as details on building components, cost. (Designingbuilding, 2018) BIM can decrease several errors during the design phase, which lead to fewer mistakes on construction sites. BIM also offers the ability to work simultaneously, which help save time. The works can be in progress while at the same time, the project team can work on drawings and estimations, diagrams and other aspects. Furthermore, BIM allows doing more work with a smaller team, plus give the team better collaboration and communication. Using BIM can increase quality and save time in the construction industry. It can also improve safety on construction sites by detecting the hazards that may become problems during design, which help to avoid physical risk by planning site logistics ahead of time. (John Hall, 2018) 2.12.5 Using Intelligent prefab Prefabricated concrete is a modern way of building and using it can be faster and more costeffective with less construction waste than traditional building methods. However, using prefabricated concrete for a large project can be very complex to coordinate, and this is where IoT can help to solve this problem. (CRL,2018) Radio Frequency identification sensors (RFID) can be used to track individual prefab through the supply chain. (Case study: construction of Leadenhall Building in London used RFID to help mitigate the effects of any downstream delays in the construction, especially during the
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