5D BIM
Linking model elements to cost, so quantities and budget follow the design as it changes.
5D BIM adds the dimension of cost. Model elements are linked to cost information — rates, resources, budget line items — so that a price can be derived from the model and, crucially, kept in step with it. When the design changes, the affected quantities and their cost implications update with it instead of being re-measured by hand each time.
The foundation of 5D is reliable quantity take off: quantities measured directly from the model objects. On top of those quantities sit cost data and estimating logic, which is what turns a bill of materials into a budget and lets teams compare design options or track cost as a project develops.
5D is most powerful when paired with 4D: linking cost to the construction schedule produces a time-phased view of spend (cash flow), so a project can be planned and monitored in both time and money from the same coordinated model. In Italian practice the cost side maps onto the computo metrico.
Need this in practice?
Quantity Take Off →