Quality Standards
Why do you and your clients need quality insurance services?
Quality control determines whether a company and its suppliers can work together successfully.
Our management team and technicians know the technical standards in international markets and what those markets actually require. When problems arise, they give concrete advice and help you select the most cost-effective quality assurance approach.
-
BST on-site quality inspections and factory audit services throughout China help businesses reduce the risks that come with poor quality, loading, storage, transportation, and non-compliance with regulations, so that specifications, packaging, marking, and delivery all meet the contract.
-
BST quality inspection hires inspectors who are responsible, careful, honest, and professional, lowering your risk of receiving defective goods.
-
We arrange our work flexibly according to your needs, helping you save time and costs.
-
We cut the travel and other incidental costs you would otherwise spend on doing the inspections yourself.
What is critical defects, major defects and minor defects?
Defects found in inspection are classified into three categories: critical defects, major defects and minor defects:
1) Critical defects
Critical defects could result in hazardous or unsafe conditions for individuals using or maintaining the product, as well as defects contravening legal regulations.
2) Major defects
Major defects may shorten the product’s life or reduce the ability to use the item (poor functioning, item incomplete or broken, etc.), or give it a flawed appearance that affects its value.
3) Minor defects
Minor defects usually do not affect normal use, but the product quality may be slightly degraded.
What can I find out from the AQL tables?
Understanding the AQL Tables
Sample Size Code Letters
| Lot batch size | S-1 | S-2 | S-3 | S-4 | I | II | III |
|---|---|---|---|---|---|---|---|
| 2 to 8 | A | A | A | A | A | A | B |
| 9 to 15 | A | A | A | A | A | B | C |
| 16 to 25 | A | A | B | B | B | C | D |
| 26 to 50 | A | B | B | C | C | D | E |
| 51 to 90 | B | B | C | C | C | E | F |
| 91 to 150 | B | B | C | D | D | F | G |
| 151 to 280 | B | C | D | E | E | G | H |
| 281 to 500 | B | C | D | E | F | H | J |
| 501 to 1200 | C | C | E | F | G | J | K |
| 1201 to 3200 | C | D | E | G | H | K | L |
| 3201 to 10000 | C | D | F | G | J | L | M |
| 10001 to 35000 | C | D | F | H | K | M | N |
| 35001 to 150000 | D | E | G | J | L | N | P |
| 150001 to 500000 | D | E | G | J | M | P | Q |
| 500001 and over | D | E | H | K | N | Q | R |

BST’s quality standards are based on the MIL-STD-105E tables shown above.