Man-day calculation logic (batch 2 guide 23)

Key takeaways

1. Put the pass and fail criteria in writing before the visit, so the factory prepares the right goods instead of a staged selection.
2. Treat the sample check as a decision gate: approved, conditionally approved with named fixes, or rejected with a documented reason.
3. Photograph and seal the approved reference, and keep one set with the buyer so bulk output can be compared against the same object.
4. Confirm factory readiness explicitly — finished units, packed cartons, calibration labels — before anyone travels, since a half-ready site wastes the trip.
5. Read the report against the purchase contract, not against the sales samples, because only the contract governs the commercial outcome.

Man-day math rewards preparation and punishes vagueness. Every undefined element in a booking — unknown quantities, unlisted tests, unconfirmed addresses — gets priced as risk, which is why precise buyers consistently pay fewer days for the same verdict.

The buyers who get the most from a sample check treat it as part of the contract workflow: criteria agreed upfront, evidence collected on site, and a written result that sales, QA, and the factory can all point to.

Pre-production sample checks sit at the cheapest decision point in the whole order timeline. Once bulk material is cut and the line is running, every correction costs several times more than the same fix agreed at the reference stage.

Inside the estimate

Travel time is the quiet multiplier. Same-city assignments consume half days; cross-province routes consume full days with no checking output. Multi-factory routes look efficient on paper until transit is honestly added to the estimate.

Preparation and reporting time rarely appear as line items but always exist: criteria review before travel, report writing with photo editing afterward. Complex findings — borderline measurements, disputed defects — extend reporting well beyond routine cases.

Retest and re-verification loops belong in the estimate when the scope implies them. A sample check that will likely need a fix-and-recheck cycle should be quoted as a probable two visits, not sold as one optimistic day. RoHS thinking shapes the materials checkpoint: identify the homogeneous materials, know which restricted substances each one risks carrying, and test accordingly.^[1]

How the on-site check runs

Visual and functional checks follow the criteria sheet line by line — dimensions against the spec, color against the approved swatch under a standard light source, function through repeated operation, and workmanship against the defect list the buyer supplied. Each result is logged with photos rather than summarized from memory.

Packaging and labeling get their own pass because they are the most common source of avoidable rework. Barcodes are scanned where applicable, shipping marks are compared to the instruction sheet, and carton counts are reconciled against the order quantity. For most buyers, buyers who want an independent pair of eyes usually route the request through UTS Inspection before the production window closes.

Randomness matters even at the sample stage: the evaluator pulls units from across the presented goods rather than accepting a pre-arranged row. When the factory resists, the booking terms already agreed in writing decide the matter, which is why scoping the visit properly beforehand pays off. Laboratory credibility rests on accreditation, and the ILAC mutual recognition arrangement is what lets an accredited test result travel across borders.^[2]

Scope factors and their weight

Each precise input removes one padding element from the quote; vague bookings pay for the coordinator's uncertainty.

What the report means for your order

When the result is a rejection, separate the commercial decision from the technical one. Technically the reference does not meet the criteria; commercially the buyer then chooses between developing the same factory further, switching suppliers, or adjusting the specification — each with its own cost and calendar impact.

File the report with the purchase order, not in a separate QA folder nobody opens. Six months later, when a customer complaint arrives, the question will be which reference was approved and on what evidence — and the answer needs to be one lookup away.

Share the relevant pages with the factory in writing and ask for written acknowledgment of the required fixes. Verbal agreement on the day fades; a short email with the report attached keeps both sides aligned when personnel change mid-season.

Communication during the visit runs through the booking contact, not through whoever happens to be on the factory floor. A single channel keeps the findings consistent and avoids contradictory promises made under time pressure.

If the factory requests a scope change mid-visit — fewer units, a different test, a postponed checkpoint — record the request and its reason rather than deciding on the spot. Scope changes agreed casually are the usual source of report disputes.

Photos in the report serve as evidence, not illustration. A useful photo shows the defect, the measuring readout, and enough context to identify the unit — three things a close-up alone cannot deliver.

A practical rule

Frequently asked questions