How to choose a manufacturing partner
The questions that separate a dependable partner from a supplier you will spend your time chasing.
- Match capability to your process and volume, not to a general claim
- Ask how quality is agreed, measured and remedied, in writing
- Insist on an itemised quote and a written timeline
- Protect your IP with an NDA and clear ownership terms
- Prefer one accountable contact over a chain of suppliers
What a manufacturing partner does
A manufacturing partner takes responsibility for turning your design into finished parts. That is different from a supplier who makes one component to a drawing, or a broker who introduces you to a factory and steps away. A partner answers for the outcome: the right process, the right quality and delivery on time.
For businesses without their own production, a partner replaces a supply chain you would otherwise have to build. For established manufacturers, a partner adds capacity and specialist processes without adding headcount.
1. Check capability against your actual part
Ask which processes they will use for your part and why. A credible answer names the process (for example CNC machining, sheet metal, injection moulding), the material and the volume it suits. Ask to see similar parts they have made, and whether the work is done in house or by a partner they manage.
2. Ask how quality is agreed and proven
Quality should be agreed in writing before work starts: the drawing, the tolerances, the inspection method and what happens if a part fails. Ask for an example first article inspection report and certificate of conformity. If they cannot show you one, they will not give you one.
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3. Look for the right standards for your sector
Regulated sectors need suppliers who can work to your quality requirements and provide the documents to prove it. Pharmaceutical and medical work often references ISO 13485 and material certificates. Defence work often references AS9100, AQAP 2110 and AS9102 first article reports. General industry usually works to ISO 9001 practices. Ask how they flow these requirements down to whoever actually makes the part.
4. Insist on an itemised quote and a written timeline
A good quote is based on your actual requirements and tells you what is included, the timeline and what would change either. Be wary of a low headline unit price that leaves tooling, inspection, packaging and delivery as extras.
5. Protect your intellectual property
Sign a mutual NDA before sharing drawings. Agree that designs, CAD files and tooling paid for by you belong to you, and that your designs will not be reused for anyone else.
6. Find out who you will actually deal with
The most common complaint about outsourced manufacturing is chasing. Ask who your named contact is, how they report progress, and who answers when something goes wrong.
Questions to ask before you sign
- Which process and material will you use, and why?
- Who makes the part, and where?
- How are quality and remedies agreed?
- What documents come with each batch?
- What exactly does the price include?
- Who owns the drawings and tooling?
- Who is my contact, and how will I hear about progress?