QA is the abbreviation of English Quality assurance. Its original meaning is quality assurance, which is defined as "all planned and systematic activities implemented in the quality management system and verified as required to provide enough trust to show that the entity can meet the quality requirements." QC is the abbreviation of English Quality control. Its original meaning is quality control, which is defined as "the general name of the operation technology and activities adopted to meet the quality requirements, the quality inspection of products, the analysis and improvement after discovering quality problems, and the personnel related to the control of nonconforming products."
brief introduction
From the purpose, QA focuses on all the work needed to ensure quality, including system, document management, training, audit and so on. QC, on the other hand, focuses on quality control itself, and through product inspection, rejects unqualified products to ensure that export products are qualified.
From the relationship between them, QA determines the items, standards and frequency of QC, and QC feeds back to QA for inspection and problem tracking records.