Design Review vs Independent Design Verification
“Design review” can mean anything from a coordination check to a formal independent verification. The appointment should define the required independence, acceptance basis, depth of recalculation and authority to close technical findings.
What level of technical challenge and independence is actually required before the client can rely on the design for approval, procurement or construction?
- Developers and asset owners
- Project managers
- Design managers
- EPC / contractor teams
- Procurement and tender teams
Signals that the technical question deserves structured attention.
- 01
A design package is approaching approval, procurement or construction release.
- 02
The project has complex multidisciplinary interfaces, novel details or high consequence of failure.
- 03
A client requires an additional technical assurance layer independent of the originating designer.
- 04
Design assumptions, calculations, constructability or compliance have been challenged.
- 05
A brownfield modification must interface with incomplete or uncertain existing information.
- 06
A dispute, change or recovery exercise requires a defensible review of the design basis.
Useful inputs before the technical conversation starts.
- 01
Design basis, codes, standards and project-specific criteria.
- 02
Drawings, specifications, calculations, models and relevant design reports.
- 03
Design responsibility matrix and interfaces between disciplines / packages.
- 04
Known deviations, concessions, value-engineering changes or unresolved technical queries.
- 05
Required level of independence, verification depth and approval authority.
- 06
Programme milestones and the decision or release that depends on completion of the review.
A credible workflow should connect evidence to the decision.
- 01
Define whether the appointment is a design review, compliance review, independent verification, due diligence exercise or another assurance function.
- 02
Establish scope boundaries, applicable criteria, independence requirements and the treatment of assumptions.
- 03
Screen the package for completeness and identify information that materially limits review confidence.
- 04
Review design basis, critical load paths / systems, interfaces, specifications and constructability according to the agreed depth.
- 05
Perform independent calculations or analysis only where the verification scope requires them.
- 06
Record findings by significance, responsibility and required closure action rather than as an unstructured comment list.
- 07
Verify material responses and closeout so the final status of critical findings is explicit.
What a useful technical output should leave behind.
- 01
Design review / verification plan or agreed review basis.
- 02
Structured comments and action register with status and responsibility.
- 03
Verification memorandum or report summarizing scope, limitations and material findings.
- 04
Independent calculations / analyses where explicitly included.
- 05
Interface or technical-risk register where useful.
- 06
Clear statement of open items, assumptions and conditions affecting reliance on the review.
Where otherwise reasonable technical work often loses value.
- 01
Using “independent verification” language when the reviewer is only performing a coordination or completeness check.
- 02
Reviewing drawings without the design basis, calculations or interface information needed to understand intent.
- 03
Creating large comment lists without distinguishing critical technical issues from drafting preferences.
- 04
Failing to define how comments are closed and who retains design responsibility.
- 05
Assuming that a review transfers statutory or designer-of-record responsibility without a clear appointment.
- 06
Starting too late, after procurement or site work has made major design decisions difficult to change.