Offshore decommissioning valuation: obligations and recovered materials

1. Define the decision, valuation date and perimeter

State whether the analysis supports provisioning, procurement, sale, investment, negotiation or a destination-route decision. Delimit structures, materials, obligations, interfaces, valuation date and physical condition. Costs already incurred, future work and contingencies must not share one line without reconciliation.

The financial perimeter should mirror the physical perimeter. Include preparation, engineering, mobilisation, dismantling, lifting, transport, storage, treatment, destination, supervision, insurance, taxes and site closure when applicable. Name exclusions so that value does not appear more complete than the evidence.

Define who bears each obligation and who receives each economic benefit. Owner, operator, contractor, material buyer and authority may hold different rights and responsibilities. Without that allocation, the model may assign revenue to a party that does not own it or omit a cost that transfers only after conditions that remain unsatisfied.

2. Build an inventory with an evidence hierarchy

Separate drawings and manufacturer references, inspections, field measurements, load records, weighbridge certificates and destination evidence. Each source answers a different question. The best available source may support an estimate, but it should not be described as measurement without direct observation.

Classify material, location, condition, accessibility, potential contamination and intended route. Record version, date and owner. The inventory connects engineering, budget, safety, traceability and potential revenue while allowing new evidence to update the model without erasing history.

3. Model execution before price

Recovery depends on execution sequence. Access, cutting, segregation, movement, equipment capacity, operating windows, productivity and environmental constraints determine quantity, cost and timing. An observed market price cannot repair a technically infeasible route.

Organise work packages with resources, duration, dependencies and acceptance milestones. Distinguish observed productivity from assumptions and apply contingency to the corresponding risk rather than using a generic percentage that hides engineering gaps.

4. Treat the closure obligation as cash flow

Project disbursements when they occur, with consistent currency, inflation and tax treatment. Legal, contractual or constructive obligations may require specific recognition and disclosure; IAS 37 is a relevant accounting reference, but applying the current standard requires professional judgement.

Economic value, execution budget and accounting provision are not synonyms. They may share data but answer different purposes and bases. The report should state its purpose, basis of value and the relationship among the figures.

Timing matters independently of the headline total. Engineering, contracting, mobilisation and physical execution may occur in different reporting periods, while material proceeds can arrive only after segregation, acceptance and collection. Model interim funding, payment terms, retentions and taxes explicitly. A project can create value overall and still face a material liquidity gap before any recovered-material cash is received.

5. Model recovered materials by quality and destination

Steel, copper, aluminium, equipment and other materials do not form a homogeneous lot. Saleable quantity, specification, preparation, contamination, losses, distance, buyer, net price and collection timing determine realisable value.

Use prices net of logistics, processing, commissions, taxes and quality discounts. Do not apply a clean-material quotation to gross mass. Where composition is uncertain, use ranges and state which inspection or sampling would reduce dispersion.

Potentially reusable equipment requires a different logic from material sold by weight. Condition, documentation, certification, preservation during dismantling, testing, storage, warranty and secondary-market depth may dominate value. Do not confuse an indicative replacement price with realisable proceeds without buyer evidence and preparation costs.

6. Reconcile estimates against weighed mass

In the anonymised case, 808 t of steel were recovered and weighed across 107 loads. The field estimate was 15.8% below weighed mass, while the manufacturer reference was 5.2% above it. These differences are not universal benchmarks; they show why each number's origin must be preserved and reconciled with available ground truth.

Reconciliation should explain differences by item, method and stage rather than merely overwriting the earlier number. That trail supports technical review, productivity learning, billing, destination control and updated assumptions for future decisions.

7. Connect operating and economic outcomes

The same case produced an approximate 46% EBITDA margin. This result was specific to that scope, prices, costs and execution conditions; it is not a promised margin for other assets. Responsible disclosure keeps the denominator, period and calculation boundary clear.

Build a bridge between material revenue and costs by work package. Show fixed and variable costs, working capital, losses, collection timing and risks. Apparent attractiveness may disappear once delays, mixed material or additional logistics enter cash flow.

8. Use scenarios that represent real decisions

Structure execution, price, recoverable-mass, productivity, destination and schedule scenarios. Sensitivities isolate variables; scenarios combine coherent conditions. Do not add incompatible shocks or present an optimistic base case as evidence.

Highlight break-even, maximum exposure, funding requirements and review triggers. The decision may be to procure, postpone, inspect, improve segregation, change route or reserve contingency—not simply to accept or reject one present value.

Assign owners to triggers and determine when the model must reopen. A new inspection, binding bid, regulatory change, weighing record or productivity variance can change mass, cost, schedule and risk together. Update governance is part of valuation: it prevents an old conclusion from remaining in use after its material assumptions have ceased to hold.

9. Integrate traceability, safety and compliance

The Hong Kong Convention entered into force on 26 June 2025 and establishes global requirements for safe and environmentally sound ship recycling. Applicability, flag, jurisdiction, facility, waste and local rules must be assessed case by case; an international reference does not replace a licence or authorisation.

Origin, segregation, transport, weighing and destination records form the physical trail supporting the financial trail. Define controls, owners and acceptance tests before execution to avoid late reconstruction of evidence.

10. Deliver a conclusion proportionate to evidence

Present value or range, valuation date, purpose, perimeter, sources, assumptions, scenarios, risks, exclusions and next tests. IVS emphasise scope, data and inputs, models, documentation and reporting; citing them does not automatically make work compliant, but it helps organise a verifiable analysis.

A strong conclusion does not hide uncertainty. It shows which variables change the decision, what evidence exists and which diligence has the highest information value. Recovered materials then stop being a generic credit and become part of a traceable capital decision. Decision-makers should also see who approves each assumption, when it expires and which documented event requires formal reconsideration promptly.