GMP: Good Manufacturing Practices in Food

GMP (Good Manufacturing Practices)

You can tell a lot about a food plant in the first sixty seconds: the smell, the floors, the state of the changing rooms. Inspectors know this. GMP is what they’re judging — the everyday operational discipline that everything else rests on.

Definition

Good Manufacturing Practices are the baseline practices for producing food consistently and hygienically: personnel, buildings, equipment, sanitation, process controls. In the US, FDA’s Current Good Manufacturing Practice (CGMP, 21 CFR 117 Subpart B) is enforceable law, not guidance.

Key facts

• The pillars: personnel hygiene and health, plant construction and grounds, sanitary operations, equipment design and maintenance, and process controls.
• FDA investigators cite CGMP failures on Form 483 — and those observations can grow into warning letters. It’s not theoretical.
• GMPs are prerequisite programs: they create the conditions for HACCP and preventive controls to work. They don’t control specific hazards at CCPs — they make sure the CCPs have a fighting chance.
• Training is load-bearing: everyone must be qualified for their hygiene and operational duties, with records to prove it.
• The greatest-hits of findings, globally: poor maintenance, dirty facilities, untrained staff. Basics, every time.

Why it matters

GMP is the plant’s operating license in practice — customers and regulators judge you on it before they read a single HACCP document. Beautiful paperwork never survives an audit when the floors tell a different story. Strong GMPs prevent the everyday failures — contamination, mix-ups, pest ingress — that no HACCP plan can fix after the fact. It’s not glamorous. It’s everything.

GMPs decay without monitoring: the prerequisites set up on day one need the same trending and review discipline as any CCP, or they quietly stop being true.

Sources: Codex CXC 1-1969; FDA.

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