Case Study: Fuel Tank Cap Supply for a rental company in North Africa
Fuel Tank Cap for A rental company in North Africa
A rental company came to us with a fuel tank cap programme for North Africa. 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
- Reorders that did not match the approved sample
- Inconsistent hardness between lots
- Documentation that arrived after the container shipped

What was specified
| Part | Fuel Tank Cap |
|---|---|
| Client | A rental company |
| Market | North Africa |
| Volume | 20,000 pieces across 4 specifications |
| Base material | Ceramic Composite |
| Sampling rounds | 4 |
| Delivery window | 6 weeks from PO to ex-factory |
| Compliance | TUV |
How it was resolved
- The specification was rebuilt around Ceramic Composite and the tolerance locked before bulk.
- A pre-production sample was approved and kept as the golden reference.
- Production ran with in-line inspection and a mid-run photo report.
- Cartons were packed to the client's own barcode and ratio specification.
- Documentation shipped with the goods instead of after them.

Result
- 20,000 pieces delivered inside the 6-week window.
- Unit cost held within 4.5% of the original quotation.
- Inspection-related rejection stayed under 0.5%.
- The specification is on file, so reorders reproduce the approved sample.
What we would repeat
Fix the specification count early. Adding variants after production starts is the most expensive change a client can request.
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.



