Of all the ISO standards, ISO 9000 series is the most popular. ISO 9000 is a set of international standards for quality management and quality assurance. The ISO 9000 family of standards like ISO 9001:2015, ISO 19011:2018, ISO 9000:2015 help organizations meet customer satisfaction and regulatory requirements and achieve continual improvement. ISO 9000 lays the fundamentals for Quality Management System (QMS).
QMS is structured framework of policies, processes and procedures for planning and execution in the core business areas of an organization. ISO 9001:2015 is the international standard for QMS.