ISO 9000 is not a product standard, it concerns processes. The efficient and effective management of processes affects whether or not everything has been done to ensure that the product satisfies the customers quality requirements.
The term ISO 9000 refers to a set of quality management standards. The ISO 9000 standards, first published in 1987 revised in 1994 and republished in 2000, have been adopted by many organizations all over the world and apply to all types of organizations, large and small, and in many industries. The 2000 version, ISO 9000:2000, placed the concept of process management directly in the Standard, although the essential goal of the standard, of achieving management system effectiveness via process performance metrics, remained the same. It reduced the emphasis on having documented procedures if clear evidence could be presented to show that the process was working well.
ISO 9000 currently includes three quality standards: ISO 9000:2000, ISO 9001:2000, and ISO 9004:2000. ISO 9001:2000 presents requirements, while ISO 9000:2000 and ISO 9004:2000 present guidelines. The three standards ISO 9001, ISO 9002 and ISO 9003 have been integrated into the new ISO 9001:2000. The entire family of standards should be used in an integrated manner. It is suggested that, beginning with ISO 9000:2000, you adopt ISO 9001:2000 to achieve a first level of performance. The practices described in ISO 9004:2000 may then be implemented to make your quality management system increasingly effective in achieving your own business goals. (ISO, 2005)
Hence when an organization claims to be "ISO 9000 compliant", it means they conform to ISO 9001:2000. ISO 9001:2000 is now the only standard in the ISO 9000 family against whose requirements a company’s quality system can be certified by an external agency. The standard classifies product into generic product categories: processed material, hardware, software and services required by the customer.