How Much Production Should Be Complete for DUPRO?

Plan DUPRO when about 30% to 50% of production is finished. UTS describes this During Production Inspection (also called DPI) stage as goods finished and packed into export cartons.[1] For a multi-SKU order, check progress for each model, color, or size before fixing the date: an order-wide average can hide SKUs with too few finished units to inspect.

For a single-SKU order of 1,000 units, the 30% to 50% window means 300 to 500 finished units. These are production-readiness quantities, not inspection sample sizes.

We are UTS, a third-party inspection company. We provide product inspection, factory audit, supplier evaluation, and laboratory testing coordination. Our reports present actual findings only. They do not contain recommendations, corrective-action plans, or shipment-release advice. The preparation guidance in this article is separate from report content.

Why 30% to 50%

The window leaves finished goods available for inspection while 50% to 70% of production remains. Our team can check available output against the agreed requirements before the whole run is complete.[1] The percentage alone does not establish readiness: product availability, packing status, access, and the agreed scope also matter.

Our initial production inspection applies around 5% to 10% completion. Our final random inspection requires 100% production with at least 80% packed.[2][3]

What Counts as Complete

Our published DPI description specifies 30% to 50% of goods finished and packed into export cartons.[1] Do not count work-in-process as finished stock. Record finished and packed quantities separately so our team can confirm what is available for the agreed checks.

• Finished — units have completed production rather than merely entered assembly. Finished status does not mean the units have passed our inspection.
• Packed — goods in export cartons are available for random selection and agreed packaging checks. Unpacked goods cannot support checks of finished carton packing.
• Listed by SKU — provide ordered, finished, and packed quantities for each model, color, size, or version. Confirm which SKUs the visit will cover; a high overall percentage does not establish that every SKU is ready.

In our inspection process, we verify finished-goods quantities and randomly select samples from available finished stock. We compare the goods with the PO, specification, approved sample, drawings, and packing files supplied for the order. Our report identifies the SKUs sampled and any checks that could not be completed. A factory update such as “40% complete” is a planning input, not a substitute for recording the quantities actually found.

Turn 30% to 50% Into Units

You can find the window by multiplying the ordered quantity for the SKU being planned by 0.30 and by 0.50. The remainder is the quantity still ahead. The table below shows that math only. It is not a sampling plan, and it does not set how many units our team inspects.

These illustrative quantities do not prove that the agreed sample or tests can be completed. Our team must confirm available stock, SKU coverage, packed cartons, and the buyer-approved sampling plan. Calculate finished quantity ÷ ordered quantity × 100 for each SKU; record its packed quantity alongside that figure.

Earlier or Later Within the Window

For a long run, one visit covers only the output available on that date. Material lots, shifts, lines, and settings can change after the visit.

Checklist Before You Fix the Date

Run through this list before you lock the DUPRO date. Each item affects whether our team can confirm the 30% to 50% condition on arrival day and cover the agreed scope.

1. Finished quantity by SKU and the number of packed cartons open for selection.
2. Line status on the inspection date: running, paused, or already moved to another product.
3. Approved sample identity, current specifications, drawings, and packing documents.
4. Agreed checks, defect definitions, on-site tests, equipment needs, and any laboratory testing our team must coordinate separately.
5. Whether our team can select cartons at random and draw units across the finished quantity.
6. Who will give our team access to finished goods, packing areas, and relevant records during the visit.

If the factory is still packing, buyers should state whether packed-carton checks are required or whether the visit should cover finished units and line conditions. Buyers should confirm that scope with our team in writing before the visit date.

Below or Above the Window

If production is below about 30%, the finished stock may be too small for the planned scope. Our team then covers only the SKUs and units actually available, and the report records the unfinished portion as not checked. Before the visit, confirm whether to change the date or agree a limited scope. This is booking guidance, not a recommendation in our inspection report.

If production is well above 50%, the visit works as a late-stage check. Our team still records findings for the available lot, but less production remains in which a process change could affect newly made units. Already-made goods may still be assessed or reworked by the supplier; those decisions remain with the buyer and supplier. If the goods are already 100% produced with at least 80% packed, the right checkpoint is generally a final inspection rather than DUPRO.[3]

Where sampling applies, our team draws the sample from the inspection lot available on site under the agreed standard. Acceptance sampling assesses the lot the sample was drawn from. It does not check every unit, and it does not cover units made after the visit.[4] Our DPI page references ANSI/ASQ Z1.4. Confirm the applicable standard, edition, inspection level, and buyer-approved sampling plan with our team before the visit.[1] ISO 2859-1 defines AQL-indexed sampling schemes for lot-by-lot inspection by attributes.[5]

What the Report Says About Completion

Our report records the inspection scope, the completion percentage actually found, the units and cartons selected, measurements and test observations, comparison of the goods against the PO, specification, approved sample, drawings and packing files buyers provide, defects found, and any checks that could not be completed.

Our reports present actual findings only, not recommendations, corrective-action plans, or shipment-release advice. Production and shipment decisions remain with the buyer and supplier.

Where barcode or QR-code scanning is in scope, we apply a 100% scan-success requirement to the inspected codes: every inspected code must scan using the agreed device and test conditions, and its decoded content must match the approved coding file. This does not mean the entire lot was scanned or guarantee readability on every device. A scan check is different from formal barcode print-quality verification, for which GS1 describes using ISO/IEC-compliant verifiers.[6]

Which Checkpoint Matches Your Completion

For a new supplier, factory evaluation addresses supplier capability; it does not establish this order's completion percentage. For inspection timing, use actual production and packing status: IPI is an early-production checkpoint, DUPRO is the mid-production check, and FRI applies after production is complete with at least 80% packed.[2][3] Container loading supervision addresses loading rather than replacing earlier production checks.

Before booking, buyers send our team the order quantities by SKU, the factory's dated production update, current specifications and sample references, and the checks they need. Use those details to confirm the proposed date, SKU coverage, and packing readiness with our team.

Bottom line: plan DUPRO at about 30% to 50% production completion, with finished goods and packed cartons available. Check progress by SKU and confirm the scope before fixing the visit date.

References

• [1] UTS During Product Inspection (DPI/DUPRO), 30%-50% stage: https://www.utsinspection.com/during-product-inspection.html
• [2] UTS Initial Production Inspection, 5%-10% stage: https://www.utsinspection.com/initial-production-inspection.html
• [3] UTS Final Random Inspection, 100% produced and 80%+ packed: https://www.utsinspection.com/final-random-inspection.html
• [4] NIST Engineering Statistics Handbook, acceptance sampling basis: https://www.itl.nist.gov/div898/handbook/pmc/section2/pmc21.htm
• [5] ISO 2859-1:2026, sampling schemes indexed by AQL for lot-by-lot inspection: https://www.iso.org/standard/2859-1
• [6] GS1, measuring printed barcode quality with ISO/IEC-compliant verifiers: https://support.gs1.org/support/solutions/articles/43000734152-how-can-i-measure-the-quality-of-my-printed-barcodes-