Non-conformance report (NCR)
Also: Nonconformance report, Non-conformance
Quick definition: A formal record that identifies work or material not meeting the requirements of the contract documents, and tracks the proposed correction, its approval and its resolution.
Explanation
Beginner explanation
When something is built wrong or with the wrong material, an NCR writes it down, says how it will be fixed and records when it was fixed and checked.
Technical explanation
NCRs are central to contractor quality management systems and owner quality-assurance programmes. Ontario's Ministry of Transportation, for example, defines non-conformance as work not meeting the contract documents and requires the contractor to document it on a standard NCR form within 24 hours and propose corrective actions and/or payment reductions and preventative measures, followed by the contract administrator's status decision; outstanding non-conformances must be resolved before completion certifications. Common dispositions in other systems include rework, repair, replace, or accept as-is with the designer's approval. NCR trends feed lessons learned and can be linked to model elements or locations.
Practical example
Concrete cylinder tests for a bridge deck pour come back below specified strength. The contractor raises an NCR, proposes coring and an engineer's assessment, and the deck is accepted with a payment reduction approved by the owner.
Why it matters
NCRs make quality problems visible and traceable, protecting the owner and providing a defensible record for both parties.
Common confusion
An NCR records non-compliant work; a Deficiency list records incomplete or defective items near handover; an RFI asks a question about the design.
Standards and references
- SSP 199S66 — Special Provision No. 199S66 — Quality Conformance Requirements. Ontario Ministry of Transportation, 2024.Widely accepted professional interpretation
Supports: Definition of non-conformance; NCR form within 24 hours; contractor proposal (corrective action, payment reduction, preventative measures); status decisions; resolution before completion certifications
VDC Stack.io writes its own explanations and does not reproduce copyrighted standards text. Consult the cited standard for normative wording.
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VDC Stack.io. (2026). Non-conformance report (NCR). In VDC Stack.io Knowledge Dictionary. Retrieved from https://vdcstack.io/dictionary/non-conformance-report/