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China Inspection Service > Useful Zone > Quality Standards
Quality Standards


Inspection standard


CIS uses the well-proven and widely adopted international standard ANSI/ASQC Z1.4-2003 (equivalent to MIL-STD-105e, ISO2859, NF06-022, BS6001, DIN40080, and GB2828) to measure the acceptable quality level of the products we inspect.


How do I determine the right sample size and acceptance number?


For example, the order quantity is 12,000 and we select general inspection levels-II (see Table A) to be as the sampling method, then we can get sample size code letter L (see Table A). With this code letter, and if we take the single sampling plan for normal inspection, we can get the sample size: 200 from table B. It means that 200 samples can well represent this order. For an AQL of 0.15, the corresponding acceptance number is 1 and the rejection is 2.


China Inspection Service Ltd-sampling plan



China Inspection Service Ltd-AQL table



As default, CIS uses general inspection level II, Single sampling plan, and the AQL of:
Critical: 0
Major: 2.5
Minor: 4.0
For example, if there's an order with 6,000 products, then according to CIS's default sampling technique, the sample size will be: 200 products. The maximum acceptable defect number will be:
Critical: 0 defective products
Major: 10 defective products
Minor: 14 defective products



Defect classification and definition


Otherwise specified by customers, CIS usually defines the defects as below:


A Defect that is likely to result in unsafe conditions or contravene mandatory regulation. In our normal practice, no Critical Defect is accepted; any of this kind of defect found will be subjected to an automatic rejection of inspection result.


A Defect that would reduce the usability of the product, or that shows an obvious appearance defect that would affect the sales of the product.


A Defect that does not reduce the usability of the product, but it is still beyond the defined quality standard and may influence the sale



Dear Aaron, Now everything perfect. Thanks indeed for your services you have a good product at very competitive pricing.
I will consider giving future pre-shipment inspections to your company.


Best Regards.


Francisco Guerra
Smart Market Development

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