Quality management (QM) basically refers to all organized measures that serve the improvement of products, processes or services of any kind. This includes the determination of the quality requirements and the test procedures. Quality control is the ongoing production-accompanying control of product quality in the context of quality assurance. In accordance with the internationally recognized ISO 9000 quality management standard, this is not about the quality to optimize a product, but to maintain a predetermined and clearly defined quality level.
This may also mean, if necessary, to ensure a low level of quality. The product may be material, as well as a service rendered or a procedure used. Also in viticulture quality controlling measures have been common for a long time, which presupposes corresponding standards. In the Spanish Rioja a document from the year 1650 already refers to a quality control.