Which of the below is for Audit of Quality Management System of an Organization? 1. ISO 9001:2008 2. ISO 9011:2011 3. ISO 17021:2015 4. ISO 9000

ISO9001 is a customer service-oriented, quality management standard first adopted in2000 by the international organization for standardization (ISO).

Among the ISO9000 family of standards, ISO9001, as revised in2008 and supplemented in2009, is the only standard for which organizations can seek certification. Certification is not a requirement of compliance, but certification serves to reassure customers that the organization is indeed in compliance. When applied to business to business environments, an ISO9001 certification helps instill confidence, especially in situations involving new business relationships or joint ventures.

For the time Auditing ISO-9000 should be the Main Auditing tool then the other Improvement  will Follow

the answer is ISO9001:2008 

ISO9001:2008 is the standard use for QMS Audit for any organisation or process as the case maybe. 

ISO9001:2008 is the standard for quality management system

   ISO9011:2011 Guidelines for audits in general but the others mentioned are :

• ISO9001:2008   standard for quality management system
• ISO17021:2015  for Requirements for bodies providing audit and certification of management systems

ISO9001:2008 -11-15 is the Audit of Quality Management System for Organizations.

ISO9000 is the basic tools of Quality Internal Auditing.

ISO9001:2008 IS A QUALITY MANAGEMENT SYSTEM WHICH HAVE CLEAR INSTRUCTIONS FOR A COMPANY TO IMPLEMENT THEM AND FOR CHECKING COMPLIANCE AUDITING IS THE ONLY WAY 

Audit to verify the compliance of Quality Management System of an Organisation adopts ISO9001:2008