ISO 9001 is defined as the international standard that specifies requirements for a quality management system (QMS). Organizations use the standard to demonstrate the ability to consistently provide products and services that meet customer and regulatory requirements. It is the most popular standard in the ISO 9000 series and the only standard in the series to which organizations can certify.
The International Organization for Standardization (ISO), an international agency composed of the national standards bodies of more than 160 countries, first published ISO 9001 in 1987. And The International Organization for Standardization (ISO) released the current version of ISO 9001 in September 2015.