ISO 9001 is a quality management system that sets internal procedures that can reduce the risk of defects and other quality issues. ISO 9001 certification is relatively common in certain industries, while less so in others.
Basic principles
1. Raw material inspections
2. Production line monitoring
3. Separation of defective products
4. Continuous product tests
5. Recording keeping
ISO 9001 certification
Suppliers can opt for third party assessments of their internal quality management system. If they pass the inspection then they can obtain an ISO 9001 certificate. This document is evidence that they follow ISO 9001.
Suppliers
If the supplier is ISO 9001 certified then they can provide a certificate or other document supporting this.