QA is process-oriented, and it focuses on preventing quality issues. QC is product-oriented and focused on identifying quality issues in manufactured products that could affect customer satisfaction. Another way to understand this distinction is actions vs. results.
QA Processes:
• Documentation
• Audits
• Supplier management
• Personnel training
• Change control
• Investigation procedures
QC Procedures:
• Batch inspection
• Product sampling
• Validation testing
• Laboratory testing
• Software testing
Many people think QA and QC are the same and interchangeable, but this is not true. Both are tightly linked and sometimes it is very difficult to identify the differences. Fact is both are related to each other, but they are different in origins. QA and QC both are part of Quality Management however QA is focusing on preventing defect while QC is focusing on identifying the defect.
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