A systematic process of ensuring that products or services meet specified standards and customer expectations. It involves planned activities and procedures to prevent defects and maintain consistent quality throughout production or service delivery.
Developed during World War II for military manufacturing, combining 'quality' from Latin 'qualitas' and 'assurance' from Old French 'aseurance.' The concept evolved from simple inspection to comprehensive quality management systems in the 1950s-60s.
Quality assurance differs from quality control - QA prevents problems while QC detects them after they occur. This proactive approach, pioneered by companies like Toyota, transformed manufacturing by building quality into processes rather than inspecting it in afterward.
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