Answer:
Step-by-step explanation:
The quality control procedures companies must install in all facets of their operations that can be audited by independent quality control experts, or registrars are known as ISO 9000.
ISO 9000 is a set of international standards for quality management systems that provides guidelines and requirements for ensuring that a company's products and services consistently meet customer requirements and regulatory standards. Statistical process control and Six Sigma are methodologies and tools companies use to improve quality and reduce defects in their operations. However, they are not themselves quality control procedures that can be audited by independent quality control experts or registrars. ISO 1000 is not a recognized standard or system related to quality control.