Buyer Resource
Casting Supplier Evaluation Checklist
How should I compare casting suppliers before sending an RFQ? This checklist covers process fit, drawing review communication, tooling and launch support, export readiness, and RFQ response quality — the areas that matter most when evaluating a new casting source.
Process Fit
Process fit and part category experience
The first evaluation step is confirming that the supplier can actually produce the process you need for the part. A supplier qualified for one casting approach is not automatically capable of all others to production standards. Verify the specific certified process scope on the quality certificate, not just the company name.
Ask whether the supplier has produced parts with similar geometry, alloy, and volume profile. A housing with thin bosses and sealing surfaces has different process demands than a simple bracket. Relevant experience reduces DFM review time and tooling risk.
Confirm the part weight and envelope dimension fit within the supplier's machine and tooling capability. A supplier with machines sized for 1–5 kg parts may not be able to cast a 12 kg housing without a different machine class or process route.
Communication Quality
Drawing review communication
A supplier's first drawing review response is a useful signal of how the sourcing discussion will go. Look for specific DFM comments — wall section concerns, draft recommendations, parting line discussion — rather than a generic acceptance or a price-only response.
A supplier who asks clarifying questions about alloy, volume, quality review scope, and secondary operation requirements before pricing is demonstrating that the quote will be based on the actual scope. Vague quotes that avoid these questions often lead to revision rounds after samples are received.
Tooling and Launch
Tooling discussion and launch support
Ask whether tooling is designed and manufactured in-house or outsourced to a third-party toolmaker. In-house tooling gives the supplier more control over design changes, repair lead time, and first-article cycle. Outsourced tooling can be lower cost but may add time to tooling revisions if rework is needed.
Confirm the supplier's T1 sample and first-article capability. For automotive and industrial programs that require dimensional reports, material certifications, process documentation, and approval samples, verify that the supplier has managed this approval scope before — not just that they claim to support it.
Export Readiness
Export readiness and documentation habits
For international sourcing, confirm the supplier is experienced in export documentation. This includes commercial invoice, packing list, certificate of origin, material certification, and any required quality documentation or test reports. Buyers who receive incomplete documentation often face customs delays or extra charges on arrival.
Ask about Incoterm options and freight coordination. A supplier experienced in FOB, CIF, or DDP terms for your destination country reduces the risk of misaligned cost assumptions in the quote.
RFQ Response
RFQ response clarity
A well-structured RFQ response should include unit price, tooling cost, sample lead time, production lead time, MOQ, and a list of any open assumptions or buyer-side decisions still needed before the quote is final. An incomplete response that leaves key scope items undefined is harder to compare against other suppliers.
Note how quickly the supplier responds and whether their communication is specific to your RFQ or generic. Response time and communication quality during the sourcing discussion are often a reliable indicator of how the supplier will communicate during production.
Evaluation Questions
Questions to ask before choosing a supplier
- →Which casting processes are covered in your current quality certification scope?
- →What is the heaviest part and largest envelope dimension you regularly produce?
- →Do you design and manufacture tooling in-house or through an external toolmaker?
- →What supplier qualification or first-article approval levels have you completed for automotive or industrial programs?
- →What quality review equipment do you operate in-house — CMM, X-ray, spectroscopy?
- →Can you describe the export documentation you provide for international shipments?
- →What open questions do you have about our drawing before you can commit to a quote?
Compare your RFQ with Bohua
Ready to send a drawing for supplier comparison? Submit your RFQ package and sourcing context for a Bohua response.
FAQ
Buyer questions about casting supplier evaluation
What files should I send with an aluminum casting RFQ?
Send 2D drawings (PDF), 3D models (STEP preferred), alloy or mechanical requirement, annual volume range, secondary operation scope, surface treatment notes, and quality review requirements. A complete package allows the supplier to review process fit and give a more complete first response.
Can I request a review before the drawing is final?
Yes. A preliminary drawing can still support a process discussion. Early review helps identify DFM risks — wall section, draft, parting line placement — before tooling decisions are made.
What if I am unsure which casting process fits the part?
A capable supplier should be able to discuss process fit based on part weight, geometry, volume, and mechanical requirements. If a supplier cannot discuss which casting approach suits your part weight, geometry, and volume profile, that is worth noting in your evaluation.
Should I include quantity range and project stage?
Yes. Volume range and project stage help assess whether the supplier is set up for prototype support, pilot runs, or full production programs. Some suppliers have strong prototype capabilities but limited volume ramp support, or vice versa.
Can photos or existing samples help the review?
Yes. Sharing a reference part or sample helps the supplier demonstrate whether they have produced similar work. It also provides a concrete basis for surface finish discussion, which is often more useful than a Ra number alone.