Case Study: Custom Shell Button for a Car Interior Supplier in Singapore
Source:Personalized Party Invitations /
Time:2026-09-18
Shell Button for a Car Interior Supplier in Singapore
A Car Interior Supplier approached us with a shell button requirement for the Singapore market. The brief was specific: a defined look, a hard launch date and a unit cost that had to survive freight and duty. This case study records what was specified, what went wrong in sampling and how the bulk order was delivered.
The challenge
- A spec that lived in an email instead of a tech pack
- A trim that passed sampling but failed in-line because it was never cycle tested
- An interlining that bubbled after the first press
What we specified
| Item | Shell Button |
|---|---|
| Client type | A Car Interior Supplier |
| Market | Singapore |
| Order volume | 5,000 pieces across 6 specifications |
| Base material | Cotton |
| Standard size | 50 mm Width |
| Finish | Gunmetal Finish |
| Sampling rounds | 3 |
| Delivery window | 6 weeks from PO to ex-factory |
| Compliance | CPSIA |
How it was resolved
- We rebuilt the specification around Cotton and locked the tolerance before bulk.
- The finish was moved to Powder Coating after strike-off tests showed better durability.
- A pre-production sample was approved and retained as the golden reference.
- Production ran with in-line inspection and a mid-run photo report.
- Cartons were packed to the client's own barcode and ratio specification.
Result
- 5,000 pieces delivered inside the 6-week window.
- Unit cost held within 2.0% of the original quotation.
- Inspection-related rejection stayed under 2.0%.
- The specification is now on file, so reorders reproduce the approved sample.
What we would repeat
Keep one accountable owner on both sides. Most delays come from hand-offs, not from machines.
Planning something similar?
If you are comparing suppliers, send us the spec they quoted against. We will quote the same spec and show you where the difference sits.
