Vetting a PCBA supplier requires assessing their SMT line capability—component pitch, BGA handling, fine-pitch QFN—their compliance with IPC Class 2 or Class 3 requirements, and their inspection infrastructure: AOI, X-ray for BGAs, ICT or FCT for functional test. A supplier who can build a simple two-layer board is not automatically qualified for a dense six-layer board with BGA packages or controlled-impedance requirements.
Why this becomes hard
PCBA suppliers commonly accept work they cannot execute well—either because they are optimistic about their line capability or because they plan to subcontract. The failure shows up at first-article inspection, after you have already paid NRE and tooling costs. Quote cycles rarely surface these gaps, because the review happens after the purchase order is placed.
What teams usually miss
Most teams focus on price and lead time and do not ask for a DFM report or a first-article inspection plan. They also do not specify IPC class—Class 2 vs Class 3—which has a large impact on rework allowance, inspection scope, and acceptable defect rates. Missing BOM-to-CPL alignment is the most common first-article failure: the BOM has the right part, the CPL has the wrong rotation or reference designator, and the mismatch only shows up after soldering.
What KnowYi does
KnowYi runs a DFM check against your Gerbers and CPL before routing to a PCBA supplier, flagging component clearance issues, soldermask problems, panelization questions, and CPL rotation errors. We require AOI results, X-ray images for BGAs, and functional test records before releasing each lot—not just a supplier-provided pass/fail claim.
What to send us
Send Gerber files, CPL (centroid file), BOM with manufacturer part numbers and approved alternates, schematic, and your IPC class requirement if known. Include any functional test procedure or test point documentation.
If you already have CAD, drawings, BOM, Gerbers, or even an incomplete file package, send it to KnowYi. We can turn it into a clear manufacturing path with missing inputs identified, quote blockers flagged, supplier routing handled, production records maintained, and delivery evidence returned.