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Similar to quality control, quality assurance originated from the military's need for consistency of military hardware. The success of Japanese manufacturers during the 1960s and 1970s shifted the focus from quality control to quality assurance. In comparison to quality control though, quality assurance focuses on the procedure of compliance and product conformity to specification through activities such as vendor appraisal, line or shop floor trouble shooting, laboratory work, field problems and method development in the production process. However, quality assurance is still basically an inspection process, though it checks more than just the product.
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