RDI workflow
BIM vs. Reality Comparison & Design Verification
the evidence system's BIM integration overlays the 3D BIM model directly onto live or recorded camera views of the site, enabling engineers and PMs to compare as-built conditions against the design model in real time without a site visit.
- Category
- Design Verification & Quality
- Frequency
- Very Common
- Confidence
- High
- Evidence records
- 30
- Cost model
- Qualitative
Trigger, activity, conclusion
A construction phase or specific installation activity is completed, and the project engineer or BIM manager needs to verify that what has been built matches the design model.
Comparing as-built site conditions directly against the BIM or design model to verify that structure, MEP installations, finishes, or sequence are correct — identifying deviations before they become costly defects.
Comparison confirms compliance or identifies a deviation that is documented, assigned as an RFI or defect, and corrected before being buried by subsequent work.
Workflow steps
- Step 01
A construction phase milestone is completed (or in progress), and the engineer or BIM manager needs to verify that what has been built matches the design model.
Inferred - Step 02
BIM model or relevant design drawing for the area loaded into the the evidence system BIM integration layer, aligned to the corresponding camera view or 360° capture point.
Inferred - Step 03
BIM overlay applied to the live camera image or 360° photograph, aligning the 3D model to the as-built perspective.
Evidenced - Step 04
Project engineer or BIM coordinator reviews the overlaid view — comparing structural elements, MEP runs, wall positions, slab levels against their modelled counterparts.
Evidenced - Step 05
Where a discrepancy is visible, the deviation is marked and documented.
Inferred - Step 06
Screenshot or clip of the overlay showing the deviation captured and attached to an RFI or defect notice in the project management system.
Inferred - Step 07
RFI assigned to the relevant subcontractor or design team member for resolution.
Inferred - Step 08
For 4D BIM schedule verification, the BIM model's time-phased sequence compared against the evidence system time-lapse or historical recordings to confirm correct sequence and rate.
Inferred - Step 09
Milestone sign-off documentation updated to reflect the verified as-built condition.
Inferred - Step 10
BIM comparison record retained as part of the as-built documentation package at project completion.
Inferred
Evidence records
BIM coordinator used the evidence system's BIM overlay feature to verify the installed position of structural steel against the Revit model — a deviation of 40mm in column base position was identified from the overlay before the concrete was poured around it.
4D BIM integration with the evidence system time-lapse used to verify the construction sequence matched the planned CPM schedule — specifically checking that temporary works were struck in the correct order before permanent structure was loaded.
Project team used the evidence system's 360° capture aligned to the BIM model to conduct a pre-close-in MEP inspection remotely — verifying pipe routes and duct positions in ceiling voids before plasterboard was installed.
ROI model
rework prevention
Evercam enables early detection of deviations from design, reducing rework costs. Saving is a fraction of the rework that would otherwise occur.
saving = project_value × rework_rate_pct × early_detection_pct × evercam_contribution_pct