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Case Study: Radiator Cap Supply for a courier company in Europe

Source:Case / Time:2026-09-18

Radiator Cap for A courier company in Europe

A courier company came to us with a radiator cap programme for Europe. The brief was ordinary and unforgiving at the same time: a fixed launch window, a landed cost that had to survive freight and duty, and a part that had to match an existing sample. This case records what was specified, what went wrong in sampling and how the bulk order landed.

The starting point

  • Documentation that arrived after the container shipped
  • A specification nobody had written down
  • Warranty claims traced back to a single lot

Radiator Cap case study

What was specified

PartRadiator Cap
ClientA courier company
MarketEurope
Volume50,000 pieces across 4 specifications
Base materialZinc Plated Steel
Sampling rounds2
Delivery window8 weeks from PO to ex-factory
ComplianceSGS

How it was resolved

  1. The specification was rebuilt around Zinc Plated Steel and the tolerance locked before bulk.
  2. A pre-production sample was approved and kept as the golden reference.
  3. Production ran with in-line inspection and a mid-run photo report.
  4. Cartons were packed to the client's own barcode and ratio specification.
  5. Documentation shipped with the goods instead of after them.

Radiator Cap production run

Result

  • 50,000 pieces delivered inside the 8-week window.
  • Unit cost held within 3.0% of the original quotation.
  • Inspection-related rejection stayed under 1.5%.
  • The specification is on file, so reorders reproduce the approved sample.

What we would repeat

Lock the material standard before sampling. Once the base changes, every downstream approval has to be redone and the calendar slips.

Planning something similar?

Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.

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