Short answer: A قطعات مهرزنیشده quality agreement defines how the buyer and تأمینکننده will control drawings, CTQ dimensions, inspection records, deviations, containment, traceability, and corrective action. It should be agreed before production, not after the first rejected lot or late shipment.
Many stamped part problems are not caused by a missing inspection device. They happen because the buyer and تأمینکننده never agreed what evidence is required, who approves deviations, how revisions are controlled, or what happens when a lot is suspect. A quality agreement turns those assumptions into a working process that supports production and reduces RFQ ambiguity.
This checklist connects with the control plan checklist, AQL sampling guide, lot traceability guide, and تأمینکننده corrective action guide.
What a quality agreement should cover
| Area | Question to settle | Typical evidence |
|---|---|---|
| Drawing control | Which revision is active, and who can approve a change? | Controlled drawing, revision log, change approval email or form. |
| CTQ dimensions | Which features need tighter inspection or capability tracking? | Ballooned drawing, inspection plan, gage record, capability result. |
| Sampling | Is production checked by 100 percent inspection, AQL, SPC, or functional gage? | AQL plan, control plan, SPC chart, first-piece and patrol records. |
| Deviation approval | Can a nonconforming lot ship, and who signs the concession? | Deviation request, affected quantity, expiry date, risk review. |
| Corrective action | What response is required when a defect reaches the buyer? | Containment record, root cause, corrective action, verification evidence. |
Why قطعات مهرزنیشده need clear quality rules
قطعات مهرزنیشده can change with tool wear, material coil variation, burr growth, lubrication, springback, plating, heat treatment, and packaging. A good agreement does not pretend every feature needs the same control. It names the features that matter and defines what evidence is enough.
For a simple bracket, first article inspection and routine dimensional checks may be enough. For an automotive terminal, spring contact, EMI shield, busbar, or safety-related bracket, the buyer may need lot traceability, material certificate, plating evidence, SPC, Gage R&R, and formal deviation approval. Related pages include the Gage R&R guide, SPC guide, and deviation approval guide.
Buyer clauses to define before production
- Active drawing revision, approved material, finish, and packaging specification.
- List of CTQ dimensions, cosmetic zones, burr side, and functional checks.
- First article, PPAP, or customer-specific approval requirement when applicable.
- Sampling plan for normal production and escalation plan after a defect.
- Rules for tool maintenance, tool repair, and notification after tool changes.
- Lot traceability, certificate retention period, and shipment label information.
- Deviation, concession, rework, sorting, and scrap approval process.
- Corrective action response time and evidence required before closure.
Keep the agreement practical
A quality agreement should not become a document that nobody uses. If it requires full reports for every noncritical dimension on every shipment, the process will slow down and still may not catch the real risk. Use the agreement to separate critical features from normal features, define what records must travel with the shipment, and specify which records are retained by the تأمینکننده.
It should also name the communication path. A buyer should know who receives a defect notice, who can approve a temporary deviation, and how quickly containment evidence is expected. That is especially useful when parts ship internationally or when the purchasing contact is not the person reviewing the drawing.
Also define what happens when something changes. Material substitution, plating تأمینکننده change, tool repair, die transfer, engineering change, and packaging change can all affect production. The engineering change control guide and tool ownership transfer guide help describe those triggers.
RFQ checklist
Send the drawing package, CTQ list, industry or customer quality requirements, target annual volume, expected shipment lot size, inspection documents required with shipment, and any existing تأمینکننده quality agreement. If the part has had rejects before, include photos, defect history, and current containment method.
To review a قطعات مهرزنیشده quality agreement with a quote, use the contact page. If you need a new تأمینکننده to match an existing approval process, send the current control plan, inspection report, and problem history through the RFQ form.
FAQ: قطعات مهرزنیشده quality agreements
Is a quality agreement needed for every stamped part?
Not every part needs a formal agreement, but repeated production parts should at least define revision control, inspection evidence, deviations, and corrective action rules.
What is the difference between a control plan and quality agreement?
A control plan defines process and inspection controls. A quality agreement defines broader buyer-تأمینکننده rules, including documents, approvals, traceability, and escalation.
Should deviations be allowed in قطعات مهرزنیشده?
They can be allowed only with buyer approval, known affected quantity, risk review, expiry date, labeling, and corrective action when needed.
What records should a stamping تأمینکننده keep?
Common records include material certificates, first article reports, inspection results, tool maintenance notes, lot traceability, deviations, and corrective actions.