4D/5D BIM
schedule & cost
4D and 5D BIM: construction sequence and cost on the model – programme linked to components, quantities and cost updated from the model.
The model extended along the time and the cost axis.
4D – construction sequence
Components are linked to activity numbers in the programme. The result is a simulation of the construction sequence that shows whether construction sections, crane use and formwork cycles fit together – before anyone breaks ground.
5D – quantities and cost
Quantities come from the model rather than from a separate take-off, and update with every design change. That makes cost changes visible while they are still decisions.
Prerequisite
Both depend on a properly structured model. Without consistent component classification, 4D becomes an animation and 5D becomes a guess.