Claims & Dispute Support — Sub-Service

Prolongation and disruption — quantified, substantiated, defensible.

Site overheads, head office overheads, loss of productivity, extended labour and plant costs, financing costs. Prolongation and disruption claims quantified using industry-accepted methodologies — measured mile, Eichleay, Hudson — with the record discipline needed to make them stand up.

Initial Commercial Risk Assessment Discuss this service

What this service is

Prolongation & Disruption Claims — the discipline behind it.

Prolongation claims recover the time-related costs of extended project duration — site staff, site establishment, plant standing time, preliminaries, head office overheads, financing costs. Disruption claims recover the productivity impact of interference with the planned method of working — even where no extension of time was granted or claimed.

Both are quantum-heavy claim categories where methodology, evidence and presentation determine outcome. Prolongation cost claims that rely on generic multipliers get discounted or rejected. Disruption claims built without a measured mile or baseline productivity record are effectively unsubstantiated. The commercial value at stake is often substantial — and the analytical discipline required is significant.

Ashforte's approach uses industry-accepted methodologies applied to project-specific evidence. Site overheads calculated from actual cost records. Head office overheads calculated using Eichleay, Hudson, or contract-specified formula. Disruption quantified using measured mile analysis or industry productivity factors with supporting evidence. Nothing invented, nothing generic, nothing left to the assessor's imagination.

Delivered the Ashforte way

This service is delivered as part of Ashforte's shared senior capability model. Recurring workstreams run to standardized procedures. Senior review sits over every output. Applied consistently across one project or across your full portfolio — at materially lower cost than staffing the equivalent capability separately on each job.

When contractors bring us in

The trigger signals for prolongation & disruption claims.

Most engagements begin at one of these trigger points. If any of them match your situation, the Initial Commercial Risk Assessment is usually the fastest way to establish scope.

Discuss an engagement

01An EOT has been granted and the associated prolongation costs need to be quantified.
02The project has suffered material disruption without a formal EOT position — but productivity loss is quantifiable.
03A previous prolongation submission was rejected as insufficiently substantiated.
04The final account requires prolongation and disruption quantification for close-out.
05A dispute is escalating and expert-witness-ready quantum is required.
06Head office overhead recovery needs a defensible methodology.

Scope of work

What's actually delivered.

The scope below is illustrative — every engagement is shaped around the contractor's specific project, contract form and commercial exposure. Any element can be scoped standalone or bundled with adjacent workstreams.

Prolongation quantum

Site-based overhead build-up
Head office overhead (Eichleay / Hudson / Emden)
Time-related preliminaries
Extended labour and plant
Financing cost recovery

Disruption methodology

Measured mile identification
Baseline productivity establishment
Industry productivity factor application
Loss of productivity quantification
Cause-and-effect narrative

Evidence base

Cost record audit
Time record audit
Correspondence linkage
Programme narrative linkage
Site diary and instruction linkage

Typical outputs

Documented. Defensible. Delivered.

Every engagement produces a defined set of tangible outputs. The client keeps everything — records, templates, dashboards, procedures. Ashforte's role is to build the discipline; the client's role is to run it.

01
Prolongation quantum report with methodology and workings.
02
Head office overhead calculation with method justification.
03
Disruption analysis with measured mile or productivity factor basis.
04
Cost record audit trail linking claim value to actuals.
05
Cause-and-effect narrative linking events to costs.
06
Full submission compliant with the contract form.
07
Supporting evidence pack organised for defensibility.
08
Expert-witness-ready structure for downstream dispute escalation.

Engagement

Scoped for the situation. Sized for contractor economics.

Prolongation and disruption quantum work is usually delivered alongside EOT claims as part of a Fixed-Fee Claim Package. On complex disputes, it's often engaged as project-embedded senior support, where a senior quantum lead sits alongside the contractor's team through the submission and negotiation process.

Engagement models in detail

FAQ

Common questions.

Do you use Eichleay for head office overheads?

Where jurisdiction and contract form permit, Eichleay is often the appropriate methodology. Where it doesn't fit — different contract law positions, different case law, different contract-specified formulas — we use Hudson, Emden, or the applicable alternative. Method selection is deliberate and documented.

What if we don't have a measured mile baseline?

Then disruption analysis is harder, but not impossible. We assess whether a measured mile can be reconstructed from surrounding records, whether industry productivity factors can be applied, and whether specific-cause quantification is possible. We tell the client honestly what level of substantiation the evidence can support.

Next step

Discuss prolongation & disruption claims for your project.

Every engagement starts with a scoping conversation. Reach out with the specifics of your situation — live project, contract form, current pressure — and we'll set up the right first step.

Start the conversation

Related sub-services.

Back to Claims & Disputes