QA is an acronym for QUALITY ASSURANCE, which means "quality assurance" in Chinese.
QC is the abbreviation of QUALITY CONTROL, which means "quality control".
QA implementation process:
When using the CMMI model to implement process improvement, you need to establish the organizational functions and roles of QA, and implement "process and product quality assurance" activities. The purpose of these activities is to support the delivery of high quality products and services by providing project staff and all levels of management with an appropriate understanding of work products and processes throughout the project life cycle.
QC Implementation Process:
It is the most basic requirement of quality management that products are inspected before they are shipped. Quality control is designed to eliminate the factors that cause nonconformity or unsatisfactory results at all stages of the quality loop by monitoring the quality formation process. Some organizations implementing ISO9000 will set up such a department or position, responsible for the ISO9000 standard requirements related to quality control functions.
Expanded:
QA and QC have another associated system management QM. QM refers to quality management, which is a managerial function activity in an organization that is relevant to all its members. It must be led by the organization's top manager, and at the same time, it is the responsibility of managers at all levels of the organization, or all members of the organization should be involved in order to seriously implement the activity.
The content of quality management is first to determine the quality policy and quality objectives, clear quality responsibility. Then, through the quality planning - quality control (internal) and quality assurance (external) a quality improvement, to achieve the established quality policy and quality objectives.
References:
Baidu Encyclopedia-QA
Baidu Encyclopedia- QC
Baidu Encyclopedia-QM