Ask any experienced project director what delayed their last urban package and you will rarely hear a technical answer.
You will hear about utility diversions discovered mid-excavation, about a traffic police approval that took eleven weeks, about a land parcel that was ninety-five per cent acquired.
Interface management is the discipline of turning those unknowns into a tracked, owned and dated register before mobilisation.
It is unglamorous work, and it is the single highest-return activity available to an infrastructure contractor.