Quality assurance (QA)
Quality assurance focuses on preventing defects through systematic processes, procedures, and standards built into how work gets done. QA is proactive, establishing the systems and controls that enable consistent quality outcomes. The goal is building quality in rather than inspecting defects out.
Examples
Quality management system: A supplier's ISO 9001-certified QMS defines processes for design control, supplier management, production, and corrective action. This systematic framework provides assurance that products will meet requirements.
Process validation: Before production begins, QA validates that manufacturing processes can consistently produce conforming products. Validation includes equipment qualification, process capability studies, and documentation of proven parameters.
Supplier QA program: An organization's supplier quality assurance program defines requirements for supplier qualification, ongoing surveillance, and performance management, ensuring that purchased materials meet quality standards.
Definition
QA differs fundamentally from quality control (QC). QA creates the conditions for quality through systems and processes. QC verifies that products meet specifications through inspection and testing. Both are necessary; QA prevents problems while QC catches those that slip through.
QA activities include developing quality standards and procedures, validating processes before production, training personnel, managing documentation, conducting internal audits, and driving continuous improvement. These activities create the foundation for quality outcomes.
Procurement interacts with QA through supplier qualification, quality agreements, and ongoing supplier quality management. Purchasing from suppliers with robust QA systems provides assurance that incoming materials will meet specifications.
QA certification standards like ISO 9001, AS9100 (aerospace), and IATF 16949 (automotive) provide frameworks for quality management systems. Certification indicates that an organization has implemented systematic quality practices and is subject to ongoing audits.
Frequently asked questions
What is quality assurance in simple terms?
Quality assurance is the set of systems, procedures, and standards that prevent defects by building quality into how work gets done. Rather than inspecting finished products, QA establishes process validation, training, documentation, and audits so that consistent quality is the expected outcome rather than a lucky one.
What is the difference between quality assurance and quality control?
Quality assurance is proactive: creating the conditions for quality through systems and processes. Quality control is reactive: verifying through inspection and testing that products actually meet specifications. Both are necessary, since QA prevents problems while QC catches the ones that slip through.
How does procurement interact with supplier quality assurance?
Procurement encounters quality assurance through supplier qualification, quality agreements, and ongoing supplier quality management. Buying from suppliers with strong QA systems provides assurance that incoming materials will meet specifications before any inspection happens. Many organizations run a formal supplier QA program that defines qualification requirements, ongoing surveillance, and performance management.
What do certifications like ISO 9001 tell a buyer?
Certifications such as ISO 9001, AS9100 for aerospace, and IATF 16949 for automotive indicate that a supplier has implemented a systematic quality management system and is subject to ongoing audits. Certification does not guarantee defect-free parts, but a certified QMS defines processes for design control, supplier management, production, and corrective action.
What activities does quality assurance include?
Typical quality assurance activities include developing quality standards and procedures, validating manufacturing processes before production, training personnel, managing documentation, conducting internal audits, and driving continuous improvement. Process validation is a good example: equipment qualification and capability studies prove a process can consistently make conforming parts before volume production starts.