Quality Assurance (QA) is any systematic procedure of deciding if an item or service meets determined requirements.
QA builds up and maintains set requirements for developing or manufacturing reliable products. A quality assurance system is intended to build client confidence and an organization's credibility, while additionally improving work procedures and productivity, and it enables an organization to more compete with others.
QA is a procedure driven methodology that encourages and defines objectives with respect to product design, development, and production. QA's main objective is following and resolving deficiencies preceding to product release.