All quality inspection services are not designed to work in the same environment

A preproduction inspection service informs the buyer about the type of raw materials (or components) that will be used in the production process

1. A preproduction inspection service informs the buyer about the type of raw materials (or components) that will be used in the production process. A common suspicion among manufacturers is that they are lowering their costs by purchasing inferior materials, which can be disastrous for the buyer (for example, using the wrong kind of chip in an electronic device). The preproduction inspection can also include a review of the procedures that will be followed once production begins. Occasionally, this can be critical because Chinese factories are notorious for cutting corners and failing to adhere to the specifications of their customers (for example, patterns for cutting fabric are received from the customer and are modified to make the process easier and faster).

  • A product quality audit inspection performed during the manufacturing process (commonly referred to as "DUPRO" in the industry) provides the buyer with an early indication of the average product quality

  • It is the most useful and underappreciated tool at the disposal of importers, who frequently rely solely on final inspections to ensure compliance

  • It is usually done after a certain number of finished products have been pulled from the production lines

  • If quality issues are discovered, it is possible that what has already been produced can be reworked, and corrective actions can be taken for the remainder of the job

  • It provides buyers with the opportunity to plan ahead and even avoid delays (repairs and re-inspection take significantly longer time when problems are discovered after all manufacturing has been completed)


Three, the final random inspection (also referred to as the "pre-shipment inspection") is by far the most common type of quality inspection china control inspection. It takes place after 100% of the shipment quantity has been completed and at least 80% of the shipment has been packed, allowing for a true random inspection (which is not always the case if quality inspection services is checked earlier in the process) and suppliers are unable to play games. It increases the pressure on suppliers while increasing the power of buyers. Its primary goal is to confirm the quality of a shipment rather than to identify and correct problems early on. As a result, I typically recommend to my clients that they supplement final inspections with a DUPRO in order to avoid discovering disasters at the last minute.


(4) The container loading inspection, similar to the pre-production inspection, is only occasionally performed. However, in some circumstances, it may be a worthwhile alternative. In some cases, it is beneficial if the buyer has a specific loading plan and requires that it be followed to the letter (for example, if some cartons are too fragile to be placed at the bottom), or if the packaging is not conventional (for example, if some garments are hung on bars and do not require any carton protection). Furthermore, it can ensure that the correct types of products are shipped out in the appropriate quantities when an importer does not have confidence in his supplier or when a number of suppliers bring their products in for consolidation. Only the most sensitive projects are required to have all four types of inspections performed on them.


 In most cases, only one or two of these tools are used, depending on the risks identified by the buyer and the circumstances. These quality inspection services are mostly used for mass-produced consumer goods that require little personalization. Different approaches are frequently used to ensure that industrial products meet specifications (with much more emphasis placed on ISO9000 Quality System Audit control during development and early production). 

Burkhard Niklas

4 Blog posts