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What is FQC for a PCB order?

FQC means final quality control: the review of the finished product and its supporting evidence before the agreed release point. For a PCB order, it connects final inspection, completed test records, quantity, identity, approved dispositions and packaging requirements. A meaningful release identifies exactly what is being accepted and the requirements used to make that decision.

The term is sometimes used alongside outgoing quality control, or OQC. Companies may assign these names to different steps. Define the responsibility and the release point in the project agreement instead of relying on the abbreviation alone. This page covers the final review and handover; earlier manufacturing controls belong in PCB quality control or PCBA quality control.

FQC is not a replacement for controls that should have happened during production. A final visual check cannot recover a missing internal-layer observation or create a functional-test result. Its value is to ensure that required evidence is present, findings have an authorized disposition and the actual shipment matches the approved product and quantity.

Separate bare-board and assembled-board release

Start by identifying the object being released. A bare board has fabrication, dimensional, connectivity and finish requirements. A populated assembly adds component identity, soldering, programming and any specified functional requirements. The final reviewer should not use the same generic checklist without considering those differences.

Check the order acceptance checklist before ordering if these requirements are not yet agreed. That resource defines the acceptance agreement; FQC applies the agreement to the actual finished lot. Keeping those tasks separate avoids changing the rules only after inspection finds a problem.

Review finished condition against the right reference

Use the released drawing and the required acceptance documents, with revisions visible to the inspector. Identify the datums and inspection methods for dimensions. For an assembly, use the intended variant and applicable workmanship criteria. A familiar-looking product is not sufficient evidence that the correct revision is in the shipment.

Final review may include condition, labeling, quantity and the characteristics specified for that stage. It should also reconcile the status of checks performed elsewhere. A missing report is different from a failing measurement, but both can leave the release unresolved. Record which situation exists rather than using an undifferentiated 鈥渘ot OK鈥� note.

The helps identify the correct document family and edition. Product-specific limits, class and customer requirements must be part of the agreed acceptance basis. This page supplies a planning framework, not substitute acceptance criteria or a universal IPC sampling table.

Sampling supports a defined lot decision

If sampling is agreed, define the lot, sample selection, characteristics, defect classification and decision rule before inspecting the sample. A small convenient handful from the top of a box may not represent the lot. Separate inspections may require different populations or methods, especially where a check is destructive or a feature has special significance.

The explains sampling as a basis for a lot decision. It should not be mistaken for a precise estimate of the quality of every unit. AQL is not permission to knowingly ship a stated percentage of defective boards, and an accepted sample does not prove that no defects exist outside it.

Use the applicable, agreed sampling procedure to choose the sample size and decision numbers. The tool below does not derive a plan from an AQL value and does not reproduce a standards table. It only compares your observations with a simple single-sample rule that you enter, then keeps the other release obligations visible.

Review an agreed sample rule and the release evidence

Enter the lot size, inspected quantity and number of nonconforming units. Count each inspected unit once, even if it has several findings; this tool models a nonconforming-unit count, not a count of defects per opportunity. For a sample plan, enter the approved acceptance number and identify the plan reference. For full inspection, the tool uses a zero-nonconforming candidate condition and still requires disposition review.

The result says whether the recorded count is within the entered rule. It does not authorize shipment. Required documents, unresolved nonconformities, traceability and packaging are reviewed separately. If any are open or not reviewed, the brief preserves those items and identifies the need for the authorized reviewer to decide what happens next.

Example: a sample is within its rule, but the lot is held

Consider an illustrative lot of 500 boards with an independently approved plan to inspect 50 and accept no nonconforming units for the characteristic in question. The observed count is zero. Numerically, that sample satisfies the entered rule. This is arithmetic using a stated plan, not a recommendation that those numbers are appropriate for a real order.

Now suppose the shipment requires a test report that has not been reconciled to the lot. The sample observation does not resolve the missing evidence. The release remains open until the required record is found, reviewed or addressed through an authorized disposition. The useful output is two separate statements: sample result within rule; required evidence unresolved.

If one nonconforming unit had been observed, the sample would exceed the entered acceptance number. Do not remove that unit, take another convenient sample and erase the original result. Apply the agreed reaction procedure, contain the affected product and record any sorting, reinspection or other authorized action with its relationship to the original lot.

Assemble a release package that can be checked

The requested package should be proportionate to the product and agreement. It might include a conformity statement, inspection results, specified electrical or functional records, traceability references, approved deviations and packing information. Agree the required format and retrieval method before shipment, particularly when customers need machine-readable serial-level records.

The traceability guide helps define record relationships and retention. A customer requesting lot evidence should not receive an unrelated demonstration report. Clearly mark sample report formats as examples and provide actual shipment evidence through the agreed project channel.

Make packaging part of the handover

Packaging protects the accepted condition during storage and transport. Define protection appropriate to the product, including mechanical support, separation, identification and applicable moisture or electrostatic handling needs. Avoid a universal instruction that every board must be baked, vacuum packed or treated identically regardless of construction and assembly state.

For moisture-sensitive assembled devices, verify the relevant component and process instructions. The provides a starting point for device-specific handling data. A bare PCB鈥檚 storage and solderability requirements need their own agreement; they should not be inferred directly from a component moisture-sensitivity label.

Check that labels survive the chosen packing arrangement and that opening one package does not break the required unit-to-record association. Define split shipments, handling instructions and carton contents explicitly. The packing list should identify what was actually released, while held or rejected units remain controlled and outside the shipment.

Resolve exceptions without rewriting history

Keep unresolved product, record and quantity issues visible until an authorized decision is made. Distinguish rework to meet the original requirement from a concession accepting a deviation. The latter requires the relevant authority and cannot be created by a calculator, an inspector鈥檚 convenience or an informal statement that the product probably works.

For returned or damaged goods, preserve the link to the original shipment and record the condition on receipt. Do not automatically treat a previously passed lot as currently acceptable after uncontrolled storage, transport damage or additional processing. Identify what changed and which checks are necessary to establish the new disposition.

The quality assurance page provides the supplier-level context. For a project enquiry, send the required release evidence, lot or serial scope, inspection expectations and packaging conditions. That discussion allows quality work to be included in the quotation instead of becoming an unplanned request at dispatch.

Final PCB inspection questions