Direct answer: A pre-shipment inspection should happen after production is complete but before goods are packed and the balance is paid, and it should be judged against a written quality standard agreed in the specification rather than against an inspector's personal opinion. It covers appearance, function, hand alignment, sealing where relevant, and packaging.
Timing decides whether an inspection saves money or only documents a problem. The useful window is narrow, and it sits between two events:
The related checkpoint earlier in the programme is the pre-production sample. That stage confirms the specification; the pre-shipment stage confirms the batch. Treating one as covering the other is the most common reason buyers end up with goods that match the sample in appearance but not in behaviour.
A watch is a mechanical assembly with an electronic function, so an inspection that only looks at appearance misses about half of what customers actually complain about. The table below lists the checkpoints that matter, and what typically goes wrong at each one.
| Checkpoint | How it is usually checked | Common defects |
|---|---|---|
| Case and overall appearance | Visual check under agreed lighting and viewing distance | Scratches, plating variation, print misalignment, contamination |
| Glass and bezel | Visual and touch check | Scratches, bubbles, seating misalignment |
| Strap and buckle | Fit and visual check | Loose stitching, weak clasp, hole spacing that does not match the sample |
| Hand alignment | Compare hand position against the dial markings | Hands not synchronised, offset introduced during assembly |
| Buttons and crown | Operate each function in sequence | Delayed contact, stiffness, accidental triggering of another function |
| LCD contrast and viewing angle | Read the display at a natural wrist angle, not only face on | Weak contrast at an angle, uneven segments |
| Backlight | Activate each unit | Uneven brightness, dark patches, short activation |
| Voice announcement, on talking models | Play every language variant shipped | Missing voice, low volume, wrong language version in the box |
| Sealing, on rated models | By the agreed method and sample size | Compressed or misplaced gasket, case back not fully seated |
| Battery condition | Check voltage on sampled units | Cells already depleted from storage before assembly |
| Packaging and barcode | Check packaging and scan the barcode | Wrong language version, unscannable barcode, incomplete manual |
On models that carry a water resistance testing requirement, sealing is the checkpoint where the gap between a good sample and a weak batch is widest, because it depends on assembly discipline rather than on component quality.
An inspection is only enforceable if the acceptance criteria are written down before the goods are produced. The commonly referenced framework for this is the AQL approach, which sets how many defects are tolerated in a sample of a given size rather than requiring every unit to be perfect.
Three decisions have to be made, and each one belongs in the specification:
Because the correct thresholds depend on a product's own quality history and on the buyer's tolerance, they are best agreed case by case. What matters is that they are recorded, signed and referenced in the purchase order, because a requirement expressed only as a good quality standard cannot be measured or disputed.
Inspections fail more often from missing inputs than from inspector error. Have these ready:
That last item is easy to overlook. An inspection that produces a report but no decision usually ends in a second inspection, which costs more than the first.
A usable inspection report identifies the production batch, states the sample size, lists defects by class with counts, includes photographic evidence and ends with a conclusion. Anything that leaves the conclusion open is not a report, it is an observation.
There are three outcomes, and each needs a pre-agreed response:
The strongest single safeguard is to make inspection results part of the payment terms, so the balance is released against an accepted report rather than against a shipping date. Buyers who plan the commercial side of an order alongside the technical side usually find the inspection easier to enforce, and the same order-level thinking is set out in our article on digital watch lead time and cost.
It is a check of finished, assembled goods against agreed criteria, carried out before packing and before the balance payment. It is the last point at which defects can be corrected while correction is still inexpensive.
After the full production run is assembled and before packaging begins. Inspecting earlier measures the line rather than the batch; inspecting later makes rework much more expensive.
AQL is a sampling approach that defines how many defects are tolerated in a sample of a given size. The appropriate level depends on the defect class and on the product's quality history, so it is agreed per programme rather than applied as a fixed value. The essential step is writing it into the specification.
This is a commercial choice. Many buyers fund third-party inspection directly to keep it independent of the supplier. Whichever route is used, the criteria and the reporting format should be defined by the buyer.
The agreed response should be rework by a fresh inspection of the reworked units, or rejection with a defined handling of tooling, materials and payment. Both outcomes work better when decided before production starts.
No. An inspection samples appearance, function and assembly quality in a batch. Performance characteristics such as rate accuracy, battery life under stated use and sealing performance need their own agreed test method, and those methods should be confirmed at specification stage.
Shishi Xinjia Electronics Co., Ltd. is a watch manufacturer established in 1997 in Shishi, Fujian, China, producing digital watches, analog-digital watches, quartz watches, talking watches and smart watches under the XINJIA, SINTE, SINKA and JAVI brands.
If you are setting up quality control for a watch order, send the checkpoint list and the defect classification you intend to use so the inspection criteria, the golden sample stage and the payment linkage can be agreed before production starts. You can review the digital watch range, compare models in the product catalogue, or contact the sales team with your target specification and inspection plan.
Email: xin-jia3@xin-jia.com
Website: www.xin-jia.com
