A qualified supplier must demonstrate a rigorous Hazard Analysis and Critical Control Point (HACCP) system that identifies, evaluates, and controls physical, chemical, and biological hazards. Key requirements include documented flow charts of production, a list of Critical Control Points (CCPs), established critical limits (e.g., specific temperatures or pH levels), and a verified monitoring system. Buyers should prioritize suppliers who hold GFSI-recognized certifications such as ISO 22000, BRCGS, or IFS, which incorporate HACCP principles into a broader food safety management framework.