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The 6-Point Batch Verification Manifest Checker
Six artefacts you can request by email before you commit to a trip, a trial order or a plant audit. Score any candidate supplier — including us — on what they can actually produce in writing. A documented answer scores 2, a verbal-only answer scores 1, no answer scores 0.
Point 1 of 6 · maps to verification layer 1
Setup sheet and program revision
Ask for the document that fixes how an operator sets up and cuts each part, and ask what happens to a batch when the revision changes mid-run. No documented reaction to a revision change is a de facto statement that the operator is still the process.
Point 2 of 6 · maps to verification layer 4
Gauge list and master part
Identify which features are checked with hard gauges and which go to a coordinate measuring machine, and establish who owns the master part that everything else is measured against. Gauge repeatability and reproducibility language is a good signal even where no formal study exists.
Point 3 of 6 · maps to verification layer 3
In-process check points
At what piece count is the process re-verified, and what specific event triggers a stop? “Every part is inspected” is a weaker answer than a written interval with a defined hold rule.
Point 4 of 6 · maps to verification layer 4
Acceptance evidence per shipment
Agree it in writing before the first batch: sampling plan, 100% sorting, dimensional report, material certificate level. Ask now for the blank form, not the fully completed one later.
Point 5 of 6 · closes the loop
Nonconformance route
Ask how a problem discovered at your dock gets back into the supplier’s process. Structured corrective action methods such as the eight disciplines are common in manufacturing; what matters is whether the supplier can describe theirs without improvising.
Point 6 of 6 · tests the whole chain
First production batch, not the sample
Buy an actual release quantity off the production fixture. A hand-made sample proves the shop can make one part; it proves nothing about part 5,000.
Supplier readiness
0out of 12, from 0 of 6 points answered
Still to request
Run the manifest against us before you shortlist. We answer all six in writing. Ask for a Sample Inspection Report Format →
The manifest scores documentation, not goodwill. A supplier scoring low may still machine well — but you would be buying on trust rather than on evidence, and a drift at part 3,000 would reach your dock before anyone noticed it.
![Shop-Floor Carbon Steel CNC Machining Guide [2026]](https://zhenlingmetal.com/wp-content/uploads/2026/08/carbon-steel-cnc-machining-handbook-r2-featured-150x150.png)
