Xometry VQC guide
Question: inspection sample size · Verified July 24, 2026

How many parts does Xometry inspect?

Direct answer

The number depends on the manufacturing process, lot size, selected inspection, and any customer-specific plan. Xometry’s published tables use larger samples as the lot grows and identify zero rejects for the listed plans. Read the current table and the live job; do not assume that one inspected part or 100% inspection applies to every order.

The live job controls. Check the purchase order, Workcenter instructions, customer drawing, and current Xometry guidance before release. This independent page does not override them.

Lot quantity and inspected quantity are different

The shipment quantity is the number of parts being released. The sample size is the number selected for the specified inspection activity. Both values should be clear in the report, and neither should be confused with the number of measurements or ballooned characteristics.

For example, Xometry’s current non-additive public table lists a sample of 5 parts for lots from 2 through 25, 8 parts for lots from 26 through 50, and progressively larger samples for larger lots. The additive table uses different sample sizes. Always verify the current table instead of copying an old value into a report.

Zero rejects does not mean zero uncertainty

A zero-reject sampling plan means the listed sample cannot contain an observed nonconforming unit for acceptance under that plan. It does not prove that every uninspected part conforms, and it does not replace process control, workmanship review, special-process evidence, or customer-specific inspection.

ASQ explains acceptance sampling as a method for making a lot decision from a sample. The producer and customer still need the correct plan, lot definition, random-selection method, acceptance criteria, and records.

What the packet should show

A defensible preflight compares the ordered quantity, produced lot, sample size, inspected serials or units when applicable, and shipped quantity. If the report repeats an OCR value such as “30 30,” the reviewer should resolve the source layout rather than treating it as a verified sample or shipment quantity.

  • The inspection type and governing sampling plan are identified.
  • Lot size and sample size agree with the current applicable table or written custom plan.
  • The report makes clear which units were inspected when identification is required.
  • No rejected result is hidden by averaging, duplicated OCR, or an incomplete page.
  • A custom or 100% inspection requirement overrides the general public table.
Independent evidence

Check the controlling information yourself

These outside references support the answer above. Open the current page and compare it with the requirements shown on your specific job.

Frequently asked questions

Short answers quality teams can use

Does Xometry inspect every part?+

Not under every inspection plan. Some jobs use a published sample; others require 100% inspection, FAIR, a custom plan, or another written requirement. The live job controls.

What does zero rejects mean?+

No rejected unit is allowed in the selected sample under the published plan. It does not guarantee that every uninspected unit conforms.

Is sample size the same as shipment quantity?+

No. The shipment quantity is the number released; the sample size is the number selected for the applicable inspection activity.

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VQC Checker is independent software and is not affiliated with, sponsored by, or endorsed by Xometry. This is general operational information, not customer approval, legal advice, export-control advice, or a substitute for qualified inspection.