The Eleven Numbers: The Data Value Ladder for IFC Models
Eleven quantities get called “the value of the data”, and they differ from one another by orders of magnitude. This comprehensive guide details each metric, how the cost and utility sides meet, how values shift across the project lifecycle, and how to properly recognise IFC data on a balance sheet.
1. Why Eleven Numbers?
When stakeholders ask, “What is this IFC file worth?”, the answer almost invariably causes confusion. A developer might cite the €15 million construction contract governed by the file. A BIM coordinator might quote the €6,000 cost of drafting the geometry from an architect’s sketches. An asset manager might evaluate the €450,000 in avoided surveys and maintenance inefficiencies over a 30-year lifecycle.
All three figures are real, but they answer fundamentally different questions. Quoting contract exposure as model value is off by a factor of one hundred or more. Mistaking transcription cost for business utility fails to justify maintenance and assurance budgets.
ForensicBIM structures data valuation along the Data Value Ladder: a formal economic framework comprising eleven distinct quantities (plus a twelfth off-ladder figure), arranged largest to smallest. These rungs span two distinct tracks:
- The Cost Side: Asks what it would cost to get the information back if it were lost or destroyed tonight.
- The Utility Side: Asks what the data produces or saves for whoever holds and operates it.
Because building information models rarely trade in liquid public markets, their defensible worth is bounded by where these two tracks intersect: the classical economic principle of deprival value.
2. How the Numbers Hang Together
The eleven numbers do not exist in isolation; they form a coherent dual-track valuation tree. The diagram below illustrates how each quantity feeds into or bounds its neighbours:
Two essential rules govern how these paths connect:
-
LOWER OF (Deprival Value): An owner would never rationally lose more than the cost to replace the data, nor would they spend more to replace it than the data is worth to keep in use. Thus,
Deprival Value = min(Re-acquisition Cost, Value in Use). - HIGHER OF (Recoverable Amount): Under international accounting rules (IAS 36), an asset’s recoverable amount is the higher of what you could sell it for (Net Realisable Value / Fair Value less costs to sell) and what you will recover by using it (Value in Use). Because specialized BIM datasets have virtually zero secondary resale market, Value in Use almost always dictates the Recoverable Amount.
3. The Eleven Numbers, Largest First
Below is the complete catalogue of all eleven quantities, plus the twelfth off-ladder figure, ordered from highest magnitude to lowest under standard operating conditions for a built facility.
Value at stake
The tender sum the design will commit. Every decision is open; exposure is at maximum.
Variation orders and rework. A clash found on site costs a steep multiple of one resolved in IFC.
The acceptance decision and whatever milestone payment or retention hangs on the deliverable.
The renewal and maintenance programme the digital asset register steers, year after year.
Value in use
Fewer design iterations, faster permitting approvals, and tender quantities that can be trusted.
Clashes avoided, prefabrication enabled, procurement quantities taken straight from model elements.
Zero separate as-built surveys; the enterprise asset register populates directly from verified delivery.
Inspection planning, maintenance scheduling, and eliminating re-measuring for every intervention.
Recoverable amount
max(Transfer Value, Value in Use). If Carrying Amount exceeds this figure, the asset must be impaired (written down).
Equal to Value in Use at its peak, because all downstream lifecycle efficiencies remain ahead.
Falling steadily as design savings are progressively realised rather than pending.
Reflects remaining operational service-life benefit—the exact figure tested during capitalisation.
Declines with remaining asset life, stepping down whenever physical fabric diverges from digital records.
Re-acquisition cost
Not applicable: nothing exists to measure. Why replacement cost cannot honestly be inflated during design.
Rising rapidly. Open trenches can be scanned cheaply; concrete-encased services cannot.
The last economical window: scans while access equipment remains erected, before finishes conceal fabric.
The full figure: permits, inspectors, disruption, destructive openings, and often zero feasible access.
Deprival value
Low: you would redraw from calculations, so it equals Reproduction Cost.
Climbing: redrawing no longer reproduces as-built variations and field adaptations.
Steps up to Re-acquisition Cost as the dataset transitions into an authoritative record.
Anchored at Re-acquisition Cost, capped by Value in Use if the asset nears end of useful life.
Current cost
What a comparable specialist firm would invoice to produce this IFC deliverable today.
The same, plus the embedded multi-discipline coordination knowledge accrued to date.
Begins incorporating surveying effort, because an equivalent model must match built reality.
Dominated by physical reality capture rather than authoring, converging on Re-acquisition Cost.
Depreciated replacement cost (DRC)
Virtually identical to Current Cost; no data is obsolete yet.
Minor discounts applied for unresolved clashes or incomplete trade deliverables.
Set by the handover forensic quality audit; establishes the benchmark for capitalisation.
Discounted for physical modifications not reflected in the IFC file. Tested against Carrying Amount.
Reproduction cost
Close to Origination Cost: no answer key exists, so designing and modeling are one effort.
Drops sharply once design documentation is fixed. Pure software modeling hours.
Days rather than weeks for a discipline model: the smallest real number on the ladder.
Static for this file, but rebuilding the old file no longer recreates the modified physical reality.
Transfer value
The contracted fee for the digital deliverable, visible directly on consultant invoices.
What a trade subcontractor charges or is reimbursed for detailing a trade model.
The handover documentation allowance or milestone payment allocated to verified IFC deliverables.
What an incoming maintenance contractor or concessionaire pays to inherit authoritative files.
Carrying amount
Usually nil: expensed immediately as preliminary design overhead.
Typically absorbed into Work in Progress (WIP) of the physical asset under construction.
The formal recognition point: capitalised as an intangible asset or physical component.
Amortised straight-line; tested annually against the Recoverable Amount.
Net realisable value (NRV)
Nil. No third-party market exists for unbuilt bespoke designs.
Nil. Model is tied exclusively to the active contractor and site.
Nil, except in rare scenarios where proprietary components are commercialised as catalog items.
Nil. The complete absence of an open resale market forces every other valuation mechanism.
Origination cost
The primary phase: architectural and engineering fees incurred to create the design solution.
Site instructions, unexpected field conditions, and newly originated engineering solutions.
As-built reconciliation: discovering and agreeing upon what was actually constructed.
Not incurred again unless facility modifications require new structural design packages.
4. Project Lifecycle Dynamics
The ladder’s order (largest to smallest) describes a completed physical facility held by an owner-operator. However, during earlier stages of the asset lifecycle, several rungs dramatically shift and invert:
- Before Construction (Design Stage): There is no physical building to laser scan or measure, meaning Re-acquisition Cost is nil. Reproduction Cost is high because transcription and design are inextricably linked.
- During Construction: The physical structure is emerging. Clashes discovered in software are resolved for minor modeling effort; clashes discovered on site require demolition and rework. Deprival Value climbs as the cost of surveying newly poured concrete outpaces drafting fees.
- At Handover: The crucial transition point. Scaffolding is still erected, access is unobstructed, and contractors are bound by retention terms. It represents the last economical moment to verify spatial and alphanumeric truth.
- Operations: Fabric is concealed behind finishes, utilities are buried, and facility teams rely on the model for statutory compliance and work orders. Value in Use dominates, and Re-acquisition Cost peaks.
5. Balance Sheet Recognition & Capitalisation
For asset owners who receive an IFC model at project delivery and wish to record it on their corporate or municipal balance sheet, the Data Value Ladder provides defensible grounding across major accounting standards:
- IFRS: IAS 38 (Intangible Assets), IAS 36 (Impairment of Assets), IFRS 13 (Fair Value Measurement).
- Dutch GAAP: Raad voor de Jaarverslaggeving (RJ 210 Immateriële vaste activa), Wet WOZ art. 17(3).
- Public Sector: IPSAS 31 (Intangible Assets), IPSAS 21 (Impairment of Non-Cash-Generating Assets).
- US Public Bodies: GASB Statement No. 51 (Accounting and Financial Reporting for Intangible Assets), GASB 72.
The Six-Step Capitalisation Framework
- Separate the data from construction cost: The model was procured within the broader design or EPC contract. Under IAS 38 / RJ 210, it can be capitalised as an identifiable intangible asset at the attributable share of contract consideration.
- Establish the initial cost at recognition: If the contractual fee split cannot be segregated, ForensicBIM’s measured Reproduction Cost represents the lowest defensible initial benchmark. Capitalised value may not exceed the actual fee incurred.
- Determine useful economic life: Establish a realistic amortisation period aligned with asset governance (typically up to 30 years for commercial buildings, up to 50 years for civil infrastructure).
- Amortise straight-line: Depreciate the asset annually from handover date across its useful economic life.
- Perform annual impairment testing: Compare the Carrying Amount with the Recoverable Amount (Value in Use). If data becomes obsolete, missing, or unmaintained, write the Carrying Amount down to the Recoverable Amount.
- Budget for ongoing maintenance: Keeping the model synchronized with physical alterations is an operational expense (OpEx). Recognizing the model on the balance sheet provides the financial justification for this annual maintenance budget.
6. Decision Guide: Which Number Answers Which Question
Different stakeholders require different numbers. Using the wrong figure in executive presentations or audit filings leads to immediate rejection by financial controllers.
| Stakeholder Question | Metric to Present | Economic Basis |
|---|---|---|
| “What could we put on our balance sheet?” | Carrying amount (if capitalised) or Depreciated replacement cost on audit date | IAS 38, RJ 210, GASB 51 |
| “What would it cost to get this back if lost?” | Re-acquisition cost (built) or Current cost | Cost side: physical survey & measurement |
| “Should we write down (impair) the asset?” | Recoverable amount against Carrying amount | IAS 36 / IPSAS 21 impairment test |
| “What would we lose without this data?” | Deprival value | min(Re-acquisition cost, Value in use) |
| “What should we pay a third party for it?” | Transfer value | Buyer’s alternative less verification cost |
| “Is our quality assurance budget justified?” | Value in use | O&M operational savings over useful life |
| “What would it cost to rebuild this file?” | Reproduction cost | Direct modeling & authoring effort |
| “Why should leadership care about this file?” | Value at stake | Capital exposure & contract magnitude |
| “What did it cost us to create?” | Origination cost | Historical engineering design fee |
7. Essential Caveats & Governance
- Estimates, not appraisals: ForensicBIM figures estimate physical authoring effort and data utility. They do not constitute certified statutory appraisals, formal insurance warranties, or commercial transaction quotes.
- The end result is assumed known: Reproduction cost assumes complete architectural plans, structural sizing, and specification sheets are available on the desk. Designing from first principles is covered by Origination Cost and belongs to the design team.
- Only what is in the file counts: External PDF documents, DWG drawings, verbal site arrangements, and external CDE properties not encoded in the IFC file are not valued.
- Calibrated against real-world BIM deliveries: Modeling effort metrics are calibrated on 121 independent expert benchmarks across institutional, commercial, and infrastructure deliverables.
- Blended hourly rate: Monetary figures rely on our transparent €85/hour blended baseline (covering direct labor, software licenses, overhead, and computing). Pro subscribers can customize this rate to match their exact local currency and labor agreements.