SOP templatesManufacturing

Nonconforming Product SOP Template

An SOP for handling product that fails to meet specification, covering containment, root cause analysis, material review board disposition and closure documentation.

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Ilia PirozhenkoReviewed by Ilia Pirozhenko, Founder, Perfect WikiUpdated September 15, 202612 steps4 roles3 min read
Standard operating procedureSOP-MFG-005 ยท Rev 1.0
Owner
Quality Manager
Effective date
September 15, 2026
Review cycle
Every 12 months

1.Purpose

To make sure nonconforming product is identified, contained and dispositioned consistently, so defective product does not reach the customer and the root cause is addressed to prevent recurrence.

2.Scope

Applies to product identified as nonconforming during inspection, in production, or after a customer complaint. Routine sampling and inspection activity itself is covered by the quality inspection SOP.

Definitions

NCR
Nonconformance report. The record documenting a nonconforming condition, its containment and its disposition.
Material review board (MRB)
The cross-functional group that decides how nonconforming product is dispositioned.
Disposition
The decision made for nonconforming product: rework, scrap, use-as-is, or return to supplier.
Containment
Action taken to stop suspect nonconforming product from moving further into production or to the customer.

3.Responsibilities

Quality Inspector
Identifies nonconforming product, tags and segregates it, and opens the NCR.
Production Operator
Stops producing suspect product when notified and assists in checking upstream and downstream product.
Material Review Board
Reviews the NCR, determines the root cause, and decides the disposition of the nonconforming product.
Production Supervisor
Coordinates containment on the floor and ensures corrective action is communicated to the shift.

RACI matrix

ActivityQuality InspectorProduction OperatorMaterial Review BoardProduction Supervisor
Identify and tag nonconforming productR/ARII
Contain upstream and downstream productRRIA
Investigate root causeRCAC
Decide and execute dispositionRIR/AI
Close the NCR and communicate corrective actionRIAR

R = Responsible, A = Accountable, C = Consulted, I = Informed

4.Materials and PPE

Materials, tools and systems

  • โ†’Nonconformance report (NCR) log or QMS
  • โ†’Quarantine area and tags
  • โ†’Root cause analysis form
  • โ†’Material review board meeting record
  • โ†’Specification and control plan for the affected part

Personal protective equipment

  • โ†’Safety glasses
  • โ†’Gloves appropriate to the product material

5.Procedure

  1. 5.1

    Stop production of suspect product

    Production Operator

    Inspector or operator who identifies a suspect nonconforming condition stops production of the affected part immediately and notifies the production supervisor.

  2. 5.2

    Tag and segregate the nonconforming material

    Quality Inspector

    Inspector tags the nonconforming product clearly and moves it to the quarantine area, physically separated from conforming product.

    Warning: Do not leave tagged nonconforming product mixed with conforming stock, even temporarily.

  3. 5.3

    Open the nonconformance report

    Quality Inspector

    Inspector opens an NCR in the log or QMS describing the part, quantity, defect found, and where and when it was discovered.

  4. 5.4

    Notify quality and production supervisor

    Quality Inspector

    Inspector notifies the quality manager and production supervisor of the nonconformance so containment can be coordinated across the affected shift or area.

  5. 5.5

    Contain upstream and downstream product

    Production Supervisor

    Inspector and operator check product made before and after the suspect part was found, including any already moved to the next process or into finished goods, and quarantine anything at risk.

    Checkpoint: All product made between the last known good check and the point of discovery is located and checked.

  6. 5.6

    Perform root cause analysis

    Quality Inspector

    Quality inspector leads a root cause analysis using the NCR details, process records and, where relevant, the operator's account of the process conditions.

  7. 5.7

    Convene the material review board

    Material Review Board

    Material review board reviews the NCR, root cause findings and quantity affected, and decides whether to rework, scrap, use-as-is or return the product to the supplier.

    Checkpoint: Disposition decision is documented on the NCR with the reasoning before any product is released or scrapped.

  8. 5.8

    Execute the disposition

    Quality Inspector

    The assigned team executes the disposition decided by the material review board, such as performing the rework, scrapping the material, or returning it to the supplier with documentation.

  9. 5.9

    Verify reworked product meets specification

    Quality Inspector

    Inspector re-inspects any reworked product against the full specification before it is released back into the production flow.

  10. 5.10

    Update and close the NCR

    Quality Inspector

    Quality inspector updates the NCR with the final disposition, quantities reworked or scrapped, and closes the record once all actions are complete.

  11. 5.11

    Communicate corrective action to production

    Production Supervisor

    Production supervisor communicates the root cause and any process change to the affected shift so the same nonconformance is less likely to recur.

  12. 5.12

    Track nonconformance trends

    Material Review Board

    Quality manager reviews NCR trends by part number, defect type and root cause monthly to identify recurring issues needing a broader corrective action.

6.Quality checks

  • โ†’Every nonconforming lot has a documented containment check of upstream and downstream product.
  • โ†’No disposition is executed before the material review board decision is documented on the NCR.
  • โ†’Reworked product is re-inspected against the full specification before release.
  • โ†’NCR trends are reviewed monthly for recurring root causes.

7.Records

  • โ†’Nonconformance reports (NCRs)
  • โ†’Root cause analysis documentation
  • โ†’Material review board decisions
  • โ†’Rework, scrap and supplier return records

8.KPIs

  • โ†’Number of NCRs opened per period
  • โ†’Average time to close an NCR
  • โ†’Percentage of nonconformances with a completed root cause analysis
  • โ†’Repeat nonconformances by part number or root cause

9.Common mistakes

  • โ†’Reworking product before the material review board decides the disposition.
  • โ†’Not checking downstream product already moved past the point of discovery.
  • โ†’Closing an NCR without a documented root cause.
  • โ†’Leaving quarantined material unlabeled or in a shared staging area.
  • โ†’Skipping re-inspection of reworked product before release.

10.Revision history

RevisionDateDescriptionReviewed by
1.0September 15, 2026Initial releaseIlia Pirozhenko

This is a template. Adapt it to your organization, equipment and local regulations before use.

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I found a bad part but the rest of the shift's output already went to the warehouse, what do I do?

Treat it as a containment issue, not just a single bad part: notify your supervisor immediately so the warehouse stock from that shift can be checked and quarantined if needed, and open an NCR describing what you found.Source: step 5.5 ยท Contain upstream and downstream product
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