RDI workflow
Stockpile, Earthworks & Volume Quantity Tracking
drone footage and fixed camera recordings used to visually estimate and verify earthworks volumes, stockpile quantities, and cut-and-fill progress.
- Category
- Claims, Disputes & Legal Evidence
- Frequency
- Common
- Confidence
- Medium
- Evidence records
- 10
- Cost model
- Qualitative
Trigger, activity, conclusion
Subcontractor/haulier submits payment application claiming earthworks volumes/stockpile quantities the main contractor's QS cannot independently verify.
Using drone-captured photogrammetric surveys and/or fixed camera recordings to independently measure/estimate earthworks volumes and stockpile quantities.
Quantity dispute resolved — subcontractor's claimed volumes verified and paid, or drone/camera evidence demonstrates discrepancy and payment adjusted.
Workflow steps
- Step 01
Earthworks/haulage subcontractor submits payment application claiming volume or load count.
Inferred - Step 02
Main contractor's QS reviews and identifies discrepancy with site records.
Inferred - Step 03
Drone survey commissioned over earthworks area/stockpile.
Evidenced - Step 04
Drone imagery processed into 3D point cloud and surface model.
Evidenced - Step 05
Processed data used to calculate volumes and compare against claimed quantities.
Evidenced - Step 06
Where drone not available, fixed camera recordings reviewed for earthworks activity timeline.
Inferred - Step 07
Drone volumetric data and/or camera evidence presented to subcontractor.
Inferred - Step 08
Parties negotiate settlement based on objective survey data.
Inferred - Step 09
Agreed volumes recorded and payment application adjusted/certified.
Evidenced - Step 10
Drone survey data and camera records archived as definitive measurement record.
Inferred
Evidence records
The main contractor's QS used drone footage to challenge a haulage subcontractor's claim for earthworks removal — the drone survey of the stockpile at month end showed approximately 30% less material than the claimed volume implied, leading to a £120k reduction in the certified payment.
A cut-and-fill earthworks subcontractor on a highways project disputed the QS's measurement of the completed earthworks. A drone photogrammetric survey was commissioned and the resulting volume calculation, compared against the original ground model, resolved the dispute in favour of the QS's position.
Fixed the evidence system cameras overlooking a materials compound were used to cross-reference a stockpile delivery claim — the camera footage showed the number of lorry movements during the claimed delivery period did not match the delivery tickets submitted, providing grounds for a payment reduction.
ROI model
dispute claims
Evercam provides visual evidence that resolves or prevents disputes with subcontractors, suppliers, and clients. Saving from faster resolution, avoided escalation, and prevented overcharges.
saving = (disputes_avoided_pct × disputes_per_year × avg_resolution_cost) + (overcharges_prevented_per_year × avg_overcharge_value)