Quality term assurance (QA) is the activity of providing evidence needed to establish confidence among all concerned, that quality-related activities are being performed effectively. All those planned or systematic actions necessary to provide adequate confidence that a product or service will satisfy given requirements for quality. Quality Term Assurance is a part and consistent pair of quality management proving fact-based external confidence to customers and other stakeholders that a product meets needs, expectations, and other requirements. QA assures the existence and effectiveness of procedures that attempt to make sure - in advance - that the expected levels of quality will be reached. QA covers all activities from design, development, production, installation, servicing to documentation. It introduced the sayings "fit for purpose" and "do it right the first time". It includes the regulation of the quality of raw materials, assemblies, products and components; services related to production; and management, production, and inspection processes.

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