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We are proven specialists, providing quantum and delay expert services

DUAL EXPERTISE, IMPARTIAL AND VALUED

EXPERTS

We provide quantum expert and delay expert services.

An Expert in Construction is a specialist who assesses, analyses, and quantifies the financial value and/or time value of claims and variations that arise on construction and engineering projects — essentially, they deal with the “how much” question in disputes.

A Quantum Expert is an expert witness appointed to provide independent and impartial opinion evidence on the quantum of claims in arbitration, adjudication, or litigation.

A Delay Expert is an expert witness appointed to provide independent and impartial opinion evidence on the time implications of claims in arbitration, adjudication, or litigation.

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We may be appointed by one party or jointly by both, and their role is to assist the tribunal or court — not to advocate for a side.


The role is to objectively and independently carry out the following:

  • Analyse the cost impact of changes, delays, and disruptions.

  • Analyse the time impact of changes, delays, and disruptions.

  • Value variations, omissions, and prolongation claims.

  • Quantify damages or loss suffered by one party (contractor or employer).

  • Assess payments due, contra-charges, or set-offs.

  • Provide a clear, reasoned, and evidenced opinion on the value of the claim.

A distinction can be made between quantum and liability which are independent but interrelated questions. This is important and each case has its nuances. A quantum expert does not concern themselves with legal blame.


The quantum expert process typically involves:

  • An independent expert report under procedural rules (e.g., CPR 35, ICC, LCIA, or RICS practice statements).

  • The expert may confer with the opposing expert to prepare a joint statement of agreed and disagreed issues.

  • Provides oral testimony at hearings or cross-examination.

  • Supports the tribunal with clear summaries, schedules, and demonstrative exhibits.

We can provide expert services concerning how much and how long? The distinction from Delay (Programme) Experts to Quantity Surveying Expert is:

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A Quantum Expert:


Focuses on how much money is due.
Uses cost and valuation data.
Often a quantity surveyor.

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A Delay Expert:


Focuses on how long the project was delayed and by what cause.
Uses programmes, schedules, and critical path analysis.
Often a planner or project manager.

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