Inspection Standards
General Standards
We use the ANSI/ASQ Z1.4-2008 (AQL) as its sampling standard and acceptable level of quality. This method is widely used to decide whether to accept a production lot without checking every single item. This standard now has equivalents in all national and international standardization organizations such as BS6001, ABC105, ANSI/ASQ Z1.4, NFX 06-022, ISO 2859 and DIN 40080.
It offers the advantage of clearly defining the number of samples to be inspected from a given lot or consignment.. It also suggests the maximum number of defective items allowed in the samples size unless specified by clients. Our default Acceptable Quality Level is Level II.
Defect Classification
Defects detected during visual inspections are classified into three categories as follows:
Critical Defect – corresponds to a defect likely to be unsafe for consumers. Our default Critical Defect AQL is Not Allowed.
Major Defect – results in function failures or reduction of product usability or obvious appearance faults which may affect the salability of the product. Our default Major Defect AQL is 2.5.
Minor Defect – doesn't reduce the usability or function of the product, but is beyond the defined quality standard and may reduce the salability of the product. Our default Minor Defect AQL is 4.0.
Clients can also specify what points are Minor, Major or Critical in their own checklists.
Understanding AQL
How do I determine the right sample size and acceptance number?
As an example, in an inspection of a 3,500 unit lot, with an Acceptable Quality Level of II, Table A indicates that sample size code letter should be "L" . Table B indicates that the sampling size of "L" should be 200 units. For an AQL of 2.5, the corresponding acceptance number is 10.
What does this mean in concrete terms?
If the number of defective units is higher than 10, the lot should be rejected. It also means that, if the lot passes inspection, there is a 95% chance that less than 5% (10 defects in this example) of the entire inspected lot will be defective.
What should I do with defective or discarded lots?
Defective items found as part of 100% inspection can be discarded, repaired or replaced. You may opt to buy the discarded lot at a discount for resale at a lower price.
How do I determine the right sample size and acceptance number?
As an example, in an inspection of a 3,500 unit lot, with an Acceptable Quality Level of II, Table A indicates that sample size code letter should be "L" . Table B indicates that the sampling size of "L" should be 200 units. For an AQL of 2.5, the corresponding acceptance number is 10.
What does this mean in concrete terms?
If the number of defective units is higher than 10, the lot should be rejected. It also means that, if the lot passes inspection, there is a 95% chance that less than 5% (10 defects in this example) of the entire inspected lot will be defective.
What should I do with defective or discarded lots?
Defective items found as part of 100% inspection can be discarded, repaired or replaced. You may opt to buy the discarded lot at a discount for resale at a lower price.
Checking Criteria
Canton Fair Inspection general on-site checking includes the following criteria:
Quantity status
Product appearance
Performance & function tests
Workmanship
Assembly
Accessories
Material
Colours
Logo
Size & measurements
Weight
Assortment
Carton status
Barcode scan test
Packing & marking
Shipping marks
Factory View
Container inspection
Besides the above aspects, we may carry out tailor-made inspection programme according to your criteria.
A comprehensive report with photographic evidence is provided within 24hrs after inspection, detailing the Canton Fair inspector's findings and outcome.
We may also send you a same day inspection report (within 6hrs after inspection) upon your request.
Other reference standards
ASTM D5430 4-POINT SYSTEM
N.B.:
1. No running yard shall be penalized more than 4 points for warp and weft defects.
2. For Fabric width exceeding 64"-66", Maximum penalty points can be increased above 4 per linear yard in proportion to the width.
3. Defects appearing within one inch of either edge shall be disregarded.
4. Any hole other than a pin hole shall be considered a major defect and assigned 4 points for penalty.
Grading:
1. Linear Yard basis:
Acceptable tolerance=20 points per 100 linear yards
2. Square yard basis:
Points/100 sq. yd= Total Points scored in the bulk X 100 X 36
Width of the roll(inch) X total yds inspected
Acceptable tolerance:
a. 28 points per 100 sq. yd. for each individual roll.
b. 20 points per 100 sq.yd. for average of rolls inspected.
1st Quality: Penalty points not exceed the acceptable tolerance.
2nd Quality: Penalty points exceed the acceptable tolerance.