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PMI Construction Professional · PMI
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- Quality assurance (QA) is the proactive, process-oriented approach to preventing defects by establishing standards, procedures, and training before work begins. Quality control (QC) is the reactive, product-oriented approach of inspecting and testing actual work products to verify they meet specifications. In construction, both are essential: QA prevents errors through proper processes, while QC catches any that still occur through inspections and testing.