noun
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Way of preventing mistakes or defects in manufactured products and avoiding problems when delivering solutions or services to customers; part of quality management focused on providing confidence that quality requirements will be fulfilled
Quality assurance (QA) is the term used in both manufacturing and service industries to describe the systematic efforts taken to assure that the product delivered to customer meet with the contractual and other agreed upon performance, design, reliability, and maintainability expectations of that customer. The core purpose of Quality Assurance is to prevent mistakes and defects in the development ... Wikipedia
