Key takeaways
- Separate lookslike, workslike, and production-intent prototypes
- Agree written approval criteria before first-off samples
- Freeze critical dimensions and materials before hard tooling
- Carry a clean evidence pack into production RFQs
Stages that actually help
A rough prototype answers “does the idea work?”. A refined prototype answers “can a user live with this?”. A production-intent sample answers “can this process repeat at the agreed quality?”.
Skipping ahead feels faster until rework costs more than the time you saved.
Concept proto
Learn function and size; materials may be temporary.
DFM pass
Adjust geometry for the intended process.
First-off / pilot
Prove the production method before scaling.
Approval gates worth writing down
Define what you will measure: dimensions, finish, function tests, packaging fit, labelling. Define who signs off and what happens if something fails.
Verbal “looks fine” approvals are how disputes start.
What to freeze before tooling
Critical interfaces, material grades, cosmetic standards, and regulatory-driven features should be stable before expensive tools are cut. Nice-to-have tweaks can wait for a revision plan.
If you are still changing the design weekly, you are not ready for hard tooling — you are still in product development.
Handing off to production quoting
Bundle CAD, BOM, drawings, sample photos, test results, and packing rules. State annual volume assumptions and first PO quantity separately.
Post that pack as a Combinate quote request when you want production bids. Evaluate respondents yourself; Combinate does not certify readiness.
Ready to request quotes?
Post a clear brief on Combinate and receive bids from UK manufacturers. Free to join — you evaluate fit yourself.
Disclaimer: This guide is general information for businesses. It is not legal, regulatory, or financial advice. Combinate does not verify or certify manufacturers.