Quality assurance (the anglicism quality assurance, QA is frequently used) is the set of planned and systematic activities applied in a quality management system so that the quality requirements of a product or service are satisfied. These activities include systematic measurement, comparison with standards, process monitoring, all activities associated with information feedback loops. These activities contribute to the prevention of errors, which can be contrasted with control. quality, which focuses on the outputs of the process. Both concepts are often used together (see QA/QC").

Testing

It is the process of executing a system with the intention of finding defects, including test planning prior to the execution of test cases. In most cases.

Quality control

It is the set of activities designed to evaluate the work for the development of a product.

Quality assurance tasks are interested in the product development process, while testing and quality control are interested in the development of the product itself.