For the entire customer base, quality standards are 'meeting their own needs'. Whether the quality meets the requirements needs to be measured by defining and explaining the additional conditions of quality
The design of on-site quality standards must be based on national quality standards and inspected according to national quality standards.
Furthermore, the quality level of products produced by enterprises can be higher than the national quality standards, but it must not be lower than these standards in order to win customer recognition
Although the quality standards can be set slightly higher, they should not be excessive. On the basis of comprehensive consideration of national standards and customer needs, enterprises can replace the original raw materials with materials of the same function and quality but different prices.