BIM coordination software is very good at one specific thing: identifying where two modeled systems occupy the same physical space. Run a clash detection pass on a coordinated model and it will return a report, often a long one, of every geometric conflict it finds.
What it won't do is tell you which of those conflicts matter, whose design has to move, or how the resolution affects clearance, code compliance, and maintainability somewhere else in the building. That part is still a human decision, and treating the clash report itself as the deliverable is where a lot of BIM/VDC processes fall short of what they're supposed to prevent.
Why the Report Isn't the Finish Line
A raw clash report mixes real conflicts with duplicates, tolerances that don't actually matter in the field, and interferences between systems that were never going to occupy the same space once installed. Sorting the signal from that noise, and assigning each real conflict to the trade responsible for resolving it, is a coordination process, not a software function.
Resolving a clash also isn't a local decision. Moving a duct to clear a structural member can eliminate one conflict and create three more downstream — reduced clearance for maintenance access, a code-required separation violation, or an obstruction of the exact cleanroom or process routing the design was protecting in the first place.
What Actual Resolution Requires
Real conflict resolution requires the engineering judgment to evaluate downstream effects of a proposed fix, a decision hierarchy so trades aren't unilaterally moving each other's work without sign-off, and a documented resolution log the field team can build from with confidence that what's in the model is what gets installed. That's a defined coordination workflow running on top of the clash detection tool, not a substitute for it.
BIM/VDC's real value is eliminating field conflicts before they cost money in rework, but that value only gets realized if the coordination process behind the software is disciplined enough to close out every conflict the software finds, not just generate the list.
Frequently Asked Questions
Does clash detection software resolve conflicts automatically?
No. It identifies where modeled systems geometrically intersect, but deciding which conflicts are real, who resolves them, and how the fix affects the rest of the design requires a coordination process managed by people.
Why do fixed clashes sometimes create new problems?
Because a resolution made in isolation, without evaluating its downstream effects on clearance, code compliance, or adjacent systems, can eliminate one conflict while introducing another somewhere else in the model.
What's the difference between running clash detection and doing BIM coordination?
Clash detection is a single automated step that produces a report. BIM coordination is the ongoing process of triaging that report, assigning resolutions to the responsible trades, and verifying the fixes before they move to the field.
Where the Real Coordination Work Happens
The software has gotten very good at finding conflicts. It hasn't gotten any better at deciding what to do about them, because that still requires understanding how the systems, and the facility, actually need to function.
Owners evaluating a BIM/VDC process should be asking less about how many clashes the model found and more about how the resolution workflow behind that report actually operates.
