Short answer: PPAP and FAI evidence for rhannau wedi'u stampio should prove that the cyflenwr made the correct drawing revision, measured the right features, used the approved material and finish, and can repeat the process. Buyers should request sample identification, ballooned dimensions, material certificates, process flow, control plan, inspection method, and open deviation status before production release.
rhannau wedi'u stampio often look simple until an approval file is missing. A good first article or PPAP package connects the part, drawing revision, tooling route, material lot, coating, inspection method, sample quantity, and approval decision in one controlled record.
Use this guide with the production approval sample evidence guide, critical dimensions inspection plan, gage correlation guide, and drawing package checklist.
PPAP and FAI evidence to request
| Item | Why it matters | RFQ detail to confirm |
|---|---|---|
| Drawing and revision proof | Prevents approval against the wrong print or model. | Controlled drawing, model revision, marked deviations, and approval owner. |
| Dimensional report | Shows whether critical and general dimensions were measured correctly. | Ballooned print, sample IDs, datum setup, equipment, and actual readings. |
| Deunydd and finish records | Confirms that samples match the quoted specification. | Deunydd certificate, finish certificate, hardness or coating data when required. |
| Proses repeatability evidence | A single good sample does not prove production control. | Proses flow, control plan, first-off checks, and open corrective actions. |
State the approval level before samples are made
Do not let the cyflenwr guess whether the buyer needs a simple FAI report, a customer-specific PPAP package, or a hybrid evidence file. The RFQ should state the expected forms, sample count, language, signature rule, and who can approve deviations.
If the buyer has a customer portal or standard form, send it with the quote package. Late format changes slow approval even when the rhannau wedi'u stampio themselves are acceptable.
Tie every sample to a controlled identity
Each submitted part should be traceable to a cavity, station, production date, material lot, tooling condition, and inspection report. This matters when one feature fails and the buyer needs to know whether the issue is random, tool-related, or measurement-related.
For multi-cavity or progressive tooling, ask whether the cyflenwr is submitting parts from the first cavity, last cavity, all cavities, or a mixed sample set. The answer affects how much confidence the approval file gives.
Adolygu measurement method, not only numbers
rhannau wedi'u stampio can shift when restrained, deburred, plated, or measured from the burr side. Ask how datums are established, whether the part is checked free-state or fixtured, and which equipment is used for flexible or spring features.
If two teams may measure differently, connect the approval with the buyer-cyflenwr gage correlation page. A pass on one bench and a fail at receiving is still a process problem.
Include material, finish, and appearance evidence
A dimensional report is not enough when the part has plating, passivation, burr direction, surface class, solderability, cyswllt force, or corrosion requirements. The evidence request should name which non-dimensional records are required.
For cyswllt parts, use the plated cyswllt wear guide or terminal solderability guide when those tests affect release.
Keep deviations separate from approval
Open deviations should be listed with owner, risk, expiration, and production impact. A buyer may accept a temporary deviation for pilot parts but still require tooling correction before regular shipments.
Do not bury deviations in email threads. Keep them with the FAI or PPAP file, quote revision, and current drawing package so reorder decisions do not depend on memory.
RFQ details to include
Anfon the controlled drawing, 3D model, critical feature list, sample quantity, approval forms, required inspection equipment, material and finish standards, annual volume, and target release date.
Anfon drawings and approval requirements through the cyswllt page. Use the RFQ form to request PPAP or FAI evidence with the tooling and sample quote.
Buyer file to keep with the quote
Keep this rhannau wedi'u stampio ppap and fai evidence request guide with the drawing revision, quote number, sample approval, cyflenwr assumptions, open risks, and release owner. That record helps future reorders, audits, corrective actions, and cyflenwr changes stay consistent.
FAQ
Is FAI enough for rhannau wedi'u stampio?
FAI may be enough for low-risk parts, but production programs often need extra evidence such as material certificates, control plan, process flow, and deviation records.
What is the most common PPAP mistake?
A common mistake is approving samples without proving drawing revision, sample identity, material lot, inspection method, and open deviation status.
Should plated parts include finish evidence?
Yes. If plating, passivation, coating thickness, solderability, appearance, or corrosion performance matters, request finish evidence with the dimensional report.
When should buyers request PPAP or FAI?
Request the required evidence level in the RFQ before tooling and samples are made, not after the cyflenwr has already prepared a different file format.
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