The ISO 9000 set of standards is important because it provides guidelines and resources for companies to consistently make products that meet customer requirements. ISO 9000 includes standards for quality management, efficiency, effectiveness and auditing.
The ISO 9000 family of standards was first published in 1987, and it deals with quality management systems. It features some well-known standards including ISO 9001:2008, ISO 9004:2009 and ISO 9000:2005, dealing with quality management; efficiency and effectiveness; and basic concepts and language respectively.
Official bodies certify organizations and issue compliance certificates. In addition, some countries have accreditation bodies that accredit the certification bodies. ISO certification is accepted worldwide.