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Case Study: Cabin Filter Housing Supply for an online marketplace seller in North America

Source:Case / Time:2026-09-18

Cabin Filter Housing for An online marketplace seller in North America

An online marketplace seller came to us with a cabin filter housing programme for North 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

  • Documentation that arrived after the container shipped
  • Warranty claims traced back to a single lot
  • Lead time that slipped twice before bulk started

Cabin Filter Housing case study

What was specified

PartCabin Filter Housing
ClientAn online marketplace seller
MarketNorth America
Volume20,000 pieces across 2 specifications
Base materialCeramic Composite
Sampling rounds2
Delivery window8 weeks from PO to ex-factory
ComplianceRoHS

How it was resolved

  1. The specification was rebuilt around Ceramic Composite 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.

Cabin Filter Housing production run

Result

  • 20,000 pieces delivered inside the 8-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

Approve a pre-production sample made from the actual bulk material. Substitute material behaves differently in service.

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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