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Case Study: Tie Rod End Supply for a bus operator in Latin America

Source:Case / Time:2026-09-18

Tie Rod End for A bus operator in Latin America

A bus operator came to us with a tie rod end 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

  • Warranty claims traced back to a single lot
  • Reorders that did not match the approved sample
  • Inconsistent hardness between lots

Tie Rod End case study

What was specified

PartTie Rod End
ClientA bus operator
MarketLatin America
Volume5,000 pieces across 2 specifications
Base materialSemi-Metallic Compound
Sampling rounds4
Delivery window6 weeks from PO to ex-factory
ComplianceECE R90

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.

Tie Rod End production run

Result

  • 5,000 pieces delivered inside the 6-week window.
  • Unit cost held within 4.5% 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?

Share a sample or a drawing and we will quote against a written specification, not against a photograph.

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