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Case Study: Differential Supply for a courier company in Southern Africa

Source:Case / Time:2026-09-18

Differential for A courier company in Southern Africa

A courier company came to us with a differential programme for Southern 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

  • Documentation that arrived after the container shipped
  • Reorders that did not match the approved sample
  • Lead time that slipped twice before bulk started

Differential case study

What was specified

PartDifferential
ClientA courier company
MarketSouthern Africa
Volume10,000 pieces across 6 specifications
Base materialPVC Coated Fabric
Sampling rounds3
Delivery window5 weeks from PO to ex-factory
ComplianceDOT

How it was resolved

  1. The specification was rebuilt around PVC Coated Fabric 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.

Differential production run

Result

  • 10,000 pieces delivered inside the 5-week window.
  • Unit cost held within 2.0% 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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