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Case Study: Exhaust Tip Supply for a bus operator in West Africa

Source:Case / Time:2026-09-18

Exhaust Tip for A bus operator in West Africa

A bus operator came to us with a exhaust tip programme for West 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

  • Warranty claims traced back to a single lot
  • A fitment that looked right on paper and failed on the bench
  • Lead time that slipped twice before bulk started

Exhaust Tip case study

What was specified

PartExhaust Tip
ClientA bus operator
MarketWest Africa
Volume20,000 pieces across 3 specifications
Base materialBronze
Sampling rounds4
Delivery window6 weeks from PO to ex-factory
ComplianceISO 9001

How it was resolved

  1. The specification was rebuilt around Bronze 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.

Exhaust Tip production run

Result

  • 20,000 pieces delivered inside the 6-week window.
  • Unit cost held within 3.0% 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

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

Planning something similar?

Ask for the current catalogue and the specification sheet for this line.

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