Warehouse & Inventory · SOP

Receiving And Quarantine Protocol For Defective Raw Materials

Standard procedure for receiving, inspecting, and physically isolating non-conforming raw materials to prevent their accidental use in production or commingling with approved stock.

Estimated Time

20 min

Difficulty

Intermediate

Regulation

CSA Z432 / ISO 9001

Version

1.0

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Purpose

To establish a consistent, auditable workflow for receiving raw materials, performing visual and dimensional inspection per the incoming quality criteria, and immediately segregating any defective or non-conforming materials into a controlled quarantine area. This protocol prevents defective materials from entering production, protects downstream quality, and ensures that suppliers are notified and corrective actions are initiated without delay.

Scope

This SOP applies to all inbound raw materials shipments received at the warehouse — including metals, plastics, chemicals, and packaging — that require a formal incoming inspection. Every receiving operator, quality inspector, and warehouse lead must follow this procedure. Exceptions (e.g., full-certified lots from approved suppliers with skip-lot status) must be documented on the exemption log.

Safety Precautions

PPEAlways wear safety glasses, cut-resistant gloves, and steel-toed boots during receiving and handling. Use back braces for heavy lifts. Follow safe lifting techniques (bend knees, keep load close).
HAZIf the defective material is hazardous (e.g., leaking chemical drums, sharp burrs, corrosive substances), refer to SDS and handle using appropriate spill containment and chemical-resistant PPE. Isolate in the hazardous waste area, not the standard quarantine cage.
LIFTUse mechanical aids (pallet jack, forklift, hoist) for any load over 25 kg. Ensure the quarantine cage is clearly marked and that no unauthorized personnel open the cage without permission from the quality department.

Required Tools & Materials

Digital tablet or paper inspection checklist template
Calibrated measuring instruments (caliper, micrometer, thickness gauge, hardness tester as per material spec)
Red quarantine tags (pre-printed with date, reason for rejection, inspector initials)
Lockable quarantine cage or clearly marked red-zone holding area
PPE: safety glasses, cut-resistant gloves, steel-toed boots
Forklift or pallet jack (for heavy pallets)
Non-conformance report (NCR) form or digital equivalent
Camera for photographic evidence (if required)

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Procedure: Step-by-Step

1 Verify shipment against documents. Compare the packing slip and bill of lading against the purchase order (PO). Note any quantity discrepancies or visible packaging damage. Do not proceed if the shipment does not match the PO — contact purchasing immediately.

2 Unload and stage incoming materials. Use appropriate material handling equipment to move the shipment to the designated receiving zone. Stage materials so each unit is accessible for inspection. Do not mix with existing stock.

3 Inspect each unit against quality criteria. Refer to the incoming inspection plan for the specific material. Perform visual checks (dents, rust, discoloration, contamination) and dimensional measurements. Document every reading on the inspection form. Mark any unit that fails with a red quarantine tag immediately.

4 Segregate defective materials. Move all red-tagged units to the lockable quarantine cage or clearly marked red zone. Ensure they are physically separated from approved materials. Record the location and quantity in the quarantine log.

5 Log defect details in inventory system. Enter the following into your inventory management system or paper log: supplier name, PO number, date received, batch/lot number, quantity rejected, defect description, and photographic evidence if applicable. Assign a unique quarantine reference number.

6 Notify purchasing and quality manager. Within 1 hour of identifying the defect, send an email or raise a non-conformance report (NCR) to the purchasing department and quality manager. Attach the inspection sheet and any photos. Initiate the supplier corrective action request (SCAR) process.

7 Retain quarantined material pending disposition. Do not move or dispose of quarantined items without written authorization from the quality manager. Typical dispositions: return to supplier (RTV), rework, scrap, or use-as-is with engineering concession. Update the inventory system once disposition is complete.

Receiving And Quarantine Protocol For Defective Raw Materials

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