Why sampling technique matters
Inspection is statistics in the real world. Unless the sampled cartons genuinely represent the whole shipment, even a perfect inspection report tells you very little. That is why QCANT treats carton sampling as a critical, controlled procedure — not a matter of convenience.
How we choose cartons
Our Sampling & Carton Sealing SOP requires that sampling:
- Covers all styles, colours and sizes, and all product states (packed and unpacked);
- Covers different production stages, all destinations and ports, and all carton types;
- Is proportional to quantity — larger styles naturally contribute more samples;
- Includes cartons from every corner of the warehouse, with carton numbers that are not close to each other;
- Never follows a predictable pattern the factory could anticipate.
For random selection, our inspectors use even-split sampling, per-pallet sampling and random-zone allocation depending on how the goods are stacked.
Marking, sealing and control
Every sampled carton is marked and its number recorded. Seals are stamped across the carton edge and tape joint, so any reopening is immediately visible. If the inspector must leave the area, samples are sealed and monitored — and the factory is asked not to touch the inspection area.
Our sealing tape is a controlled item: it is stored properly, used only by authorised inspectors, never left with the factory, and its in-and-out movement is recorded. These sealed cartons also become evidence if a quality dispute arises later.
What this means for you
For buyers, this SOP means the inspection you paid for is statistically meaningful — and the sealed goods can be traced back to the samples we actually checked. It is one more layer of protection between your money and an unwelcome surprise.
Preview our quality policies (EN / 中文) →
QCANT — Independent quality inspection & auditing in China. Contact us: cs@QCANT.com.