Quality Assurance / QA-QC
Scan-based QA/QC — overlay as-installed point cloud data against the coordinated BIM model to verify install accuracy before ceilings close and finishes go in.
How CG3D delivers it
A pre-closeout scan creates a permanent, measurable record of the as-installed condition. Overlaying that scan against the coordinated BIM model exposes every misalignment, missing hanger, or out-of-tolerance install before drywall hides it.
Color-mapped deviation reports highlight where reality drifts from design — by element, system, or floor. Issues get punched while trades are still on site, not months later when fixing them costs ten times as much.
The same scan and report becomes a high-fidelity asset record for the owner — supporting handover, warranty claims, and facility management for the life of the building.
What's included
- Scan vs. BIM deviation analysis
- Installation verification
- Progress monitoring and documentation
- Tolerance compliance reporting
Why it matters
- Catch install errors while trades are still mobilized
- Document compliance with measurable evidence
- Reduce punch list at substantial completion
- Hand owners a verified as-built record
Frequently asked questions
When in the schedule should we scan for QA/QC?
Just before closing the ceiling or wall — once MEP rough-in is complete but before finishes start. That timing maximizes the fix window while everything is still accessible.
How are deviations reported?
Color-mapped 3D deviation maps plus a per-element table showing exact offset from design. Reports are filterable by trade, floor, and tolerance threshold.
Can scan-based QA/QC replace third-party inspection?
It augments, not replaces, code-required inspections. But it provides a level of measurable evidence that traditional inspection cannot match.
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