A single unresolved duct-versus-beam clash discovered after the slab is poured typically costs three to five working days plus a structural review. The same clash resolved in the coordination model costs twenty minutes.
We freeze the combined services drawing before any sleeve is cast. It carries every discipline at true size, including insulation thickness, valve access space and maintenance clearance — the three things that generic layouts ignore.
Maintenance clearance is the most commonly forgotten dimension. A chiller that technically fits into a plant room but cannot have its tubes pulled is a defect, not a tight fit.
The discipline pays back at commissioning, where sequences run without improvised rerouting, and again in year three, when the facility team can actually reach every isolation valve.