1）ISO9000：2005《Quality Management SystemSection I: Basics and Terminology

2) ISO9001:2008 "Quality Management System - Requirements"

3) ISO9004:2009 "Guidelines for Performance Improvement of Quality Management Systems"

4) ISO 19011:2011 - Guidelines for Auditing Management Systems for Quality and Environmental Management

Standard provisions for the fundamental principles of quality and/or environmental audits, management of audit programs, implementation of audits of quality and/or environmental management systems, and requirements for the qualifications of quality and/or environmental management system auditors.