Quality assurance (QA) is planned and systematic set of activities necessary to provide adequate assurance that product and services will confirm to specific requirement and users or customers need.
It is process oriented.
It is defect prevention based.
To determine the quality assurance the most popular tool is used i. e Shewart Cycle which is developed by Dr. W. Edwards Deming. This cycles for quality assurance consists of four steps (PDCA)
Plan -: Define your objective and determine the strategy and supporting methods requires to achieve that objectives.
Do -: Perform necessary training to execute the plan.
Check -: Determine whether work is progressing according to the plan.
Act -: Take the necessary action if work is not being performed according to plan or results.