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Building a Network Transformer Supplier Audit Scorecard

#hardware #codequality #supplychain #electronics

A supplier should be approved from evidence across technical, quality, production and delivery controls—not from unit price alone.

Weighted Scorecard 

weights = {
    "technical_capability": 0.25,
    "quality_system": 0.20,
    "manufacturing_and_test": 0.20,
    "sample_results": 0.15,
    "delivery_and_capacity": 0.10,
    "communication": 0.10,
}

scores = {
    "technical_capability": 88,
    "quality_system": 82,
    "manufacturing_and_test": 80,
    "sample_results": 90,
    "delivery_and_capacity": 78,
    "communication": 85,
}

total = sum(scores[k] * weights[k] for k in weights)
print(round(total, 1))
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Example decision bands:

85-100  Approved
70-84   Conditional approval
<70     Additional review or rejection
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Critical failures can override the numeric score.

Technical Audit 

technical_review:
  channels: "verified"
  turns_ratio: "verified"
  center_taps: "verified"
  ocl_conditions: "verified"
  insertion_loss: "verified"
  return_loss: "verified"
  isolation: "verified"
  poe_dcr_and_bias: "if applicable"
  pinout: "pin-by-pin comparison"
  package: "PCB footprint confirmed"
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Process Evidence

  • Approved material list
  • Work instructions
  • Calibration records
  • In-process inspection
  • Final test records
  • Lot traceability
  • Nonconforming-material segregation
  • Corrective-action reports
  • Change notifications

Traceability Test

Select one shipped lot and ask the supplier to retrieve:

{
  "purchase_order": "",
  "part_number": "",
  "production_lot": "",
  "raw_material_lot": "",
  "test_record": "",
  "packaging_label": "",
  "shipment_record": ""
}
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Sample Qualification

  1. Compare datasheets.
  2. Inspect dimensions and pins.
  3. Measure critical parameters.
  4. Assemble on the target PCB.
  5. Run Ethernet and PoE tests.
  6. Save the lot and test record.

Voohu Technology supplies network transformers, LAN magnetics and RJ45 connectors. Sample orders can start from 50 pieces, with BOM sourcing support and typical three-to-five-day DHL delivery subject to stock and destination.

More information: Voohu Technology
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