Biseja Pty Ltd v NSI Group Pty Ltd [2006] NSWSC 1496

Biseja Pty Ltd v NSI Group Pty Ltd [2006] NSWSC 1496

Not every assumption underlying an expert report must be proved before admitting the report; it suffices that the opinion is based on identified assumptions, proof of which may affect weight but not admissibility. The expert evidence regarding customary roles and rates in the construction industry is admissible, provided its underlying assumptions relate to industry practice rather than contract interpretation.

Parties
Plaintiff: Biseja Pty Ltd; Defendant: NSI Group Pty Ltd
Jurisdiction
Australia
Judgment Date
05 December 2006
Procedural Posture
Civil / Evidentiary Ruling on Admissibility of Expert Evidence
Outcome
Expert report admitted
Legal Topics
Expert Evidence, Admissibility of Opinion Evidence, Construction Industry Practice
Evidence Expert Evidence Admissibility of Opinion Evidence Construction Industry Practice

Case Brief

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Parties

Biseja Pty Ltd

Plaintiff

NSI Group Pty Ltd

Defendant

Procedural Posture

Civil / Evidentiary Ruling on Admissibility of Expert Evidence

Legal Issues

  1. 1 Whether the expert report of Mr Incoll is admissible as opinion evidence regarding construction industry practice
  2. 2 Whether every assumption in an expert report must be proved as a condition of admissibility
  3. 3 Whether interpretation of construction contract is a proper matter for expert opinion

Ratio Decidendi

Not every assumption underlying an expert report must be proved before admitting the report; it suffices that the opinion is based on identified assumptions, proof of which may affect weight but not admissibility. The expert evidence regarding customary roles and rates in the construction industry is admissible, provided its underlying assumptions relate to industry practice rather than contract interpretation.

Court Disposition

Expert report admitted

Orders

  • Report of Mr Incoll annexed to his affidavit admitted in its entirety