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Case Study: Knock Sensor Supply for a bus operator in Latin America

Source:Case / Time:2026-09-18

Knock Sensor for A bus operator in Latin America

A bus operator came to us with a knock sensor programme for Latin America. 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
  • Packing that arrived crushed at the port
  • Documentation that arrived after the container shipped

Knock Sensor case study

What was specified

PartKnock Sensor
ClientA bus operator
MarketLatin America
Volume5,000 pieces across 6 specifications
Base materialSemi-Metallic Compound
Sampling rounds3
Delivery window10 weeks from PO to ex-factory
ComplianceREACH

How it was resolved

  1. The specification was rebuilt around Semi-Metallic Compound 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.

Knock Sensor production run

Result

  • 5,000 pieces delivered inside the 10-week window.
  • Unit cost held within 1.5% of the original quotation.
  • Inspection-related rejection stayed under 1.0%.
  • 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 specification you are working to and we will confirm what we can match, what we would change and why.

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