QA Quality Assurance
According to DIN EN ISO 8402, 1995-08, Section 3.5 is meant by quality assurance of any planned and systematic activity that is realized within the system and will set out to build trust to the extent that an entity will fulfill requirements for quality. Quality assurance is the sum of all measures to ensure consistent product quality. A distinction is self-monitoring and external monitoring. Beyond this is the certification of the quality management system according to ISO 9001.