ISO9000 series, the quality assurance standard of ISO, International Organization for Standardization, is the systematic assurance of appropriate functioning of quality assurance at the designated factories or offices after authorized inspection by the third party, a nominated inspection and registration organization.

It is different from JIS mark indication approval system that guarantees material reliability of products themselves, while ISO9000 evaluates quality management system itself.

In 1970's Western countries aimed to strengthen company competitiveness by improving quality control system, and simultaneously pursued to establish reliability and safety of products.

Thereafter, movements occurred to unify different standards of various countries into one.

Thus, ISO9000 was established basing upon the Anglo-American standards in 1987.

Since acquisition of ISO9000 registration is regarded as prerequisite for most of business transactions in EC, Japanese companies have started to acquire this certification.

Acquisition of ISO9000 is recognized to have advantage over product liability suits or trouble prevention.

Since the abolition of MIL-Q-9858A, which was regarded as the Bible for quality control in the aerospace industries in U.S.A. and Europe, such industries searched for a newly unified standard for their own use.

In December 1998, major aerospace companies from around the world established International Aerospace Quality Group, IAQG, to unify the related international quality management systems.