Man-day calculation logic (batch 2 guide 22)

Key takeawaysLock the approved reference before bulk material is cut, because every later argument about color, feel, or function traces back to that baseline. · Put the pass and fail criteria in writing before the visit, so the factory prepares the right goods instead of a staged selection. · Treat the sample check as a decision gate: approved, conditionally approved with named fixes, or rejected with a documented reason. · Photograph and seal the approved reference, and keep one set with the buyer so bulk output can be compared against the same object. · Confirm factory readiness explicitly — finished units, packed cartons, calibration labels — before anyone travels, since a half-ready site wastes the trip.

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.

Third-party sample evaluation exists to separate reference approval from production pressure. The evaluator has no stake in keeping the line running, which is exactly why the verdict carries weight with both sides.

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.

What a man-day covers

On-site working time is the visible part: opening meeting, goods verification, checkpoint execution, photo documentation, and the closing debrief. A dense criteria sheet with forty checkpoints simply takes longer than a ten-line visual review, and no staffing trick changes that arithmetic.

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. The WTO TBT Agreement frames the bigger picture: technical regulations should not create unnecessary obstacles to trade, which is why documented evidence of conformity smooths market access.^[1]

What happens during the visit

The evaluator starts by confirming identity of the goods: purchase order number, item codes, quantities presented, and whether the units on the table match what the booking described. If the factory presents a different item or an incomplete size range, that gap is recorded before any testing begins.

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. In practice, buyers sourcing across provinces often centralize sample evaluation in China so every factory works from the same approved reference.

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. The factory-acceptance-test mindset helps here — agree the pass criteria first, witness the evidence, and only then release the goods.^[2]

What drives the day count

A booking with two or more heavy-case factors should be estimated as multiple days from the start rather than squeezed into one.

After the visit: turning findings into decisions

A conditional approval is the most misread outcome. It is not a soft pass; it lists named fixes with a deadline, and bulk production should not start until those fixes are re-verified. Treat the conditions as contract amendments, because functionally that is what they are.

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.

Factories cooperate best when they know exactly what will be checked and why. Send the criteria sheet ahead of the visit so the factory can stage the goods, prepare measuring tools, and have the responsible technician present.

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.

Worth remembering

Frequently asked questions