ISO 9001 is the world's best-known quality management system (QMS) standard. It provides a framework for organizations to deliver consistent products and services that meet customer and regulatory requirements. The certification is based on seven quality management principles including customer focus, leadership, engagement of people, process approach, improvement, evidence-based decision making, and relationship management [3].
For B2B buyers, ISO 9001 certification signals that a supplier has established processes for quality control, continuous improvement, and customer satisfaction. It's not a product certification but rather a system certification—meaning it verifies that the supplier has robust processes in place to consistently deliver quality products, not that every individual product meets specific performance standards.
Certification is voluntary and performed by independent certification bodies. The process typically involves two stages: Stage 1 audit reviews documentation and readiness, while Stage 2 audit assesses actual implementation and effectiveness of the quality management system [4].

