Part of the food safety management pillar, along with HACCP.
What are Good Manufacturing Practices?
Good Manufacturing Practices (GMP) are the set of basic operating conditions and procedures — hygiene, infrastructure, personnel management and process control — that a food plant must meet to consistently produce a safe food. In most regulatory frameworks they are a minimum legal requirement, not an optional certification.
GMP as a HACCP "prerequisite program"
Within food safety management terminology, GMP is considered a prerequisite program (PRP): the operational foundation that must be working correctly for a system such as HACCP to make sense. HACCP identifies and controls specific hazards at critical points; GMP guarantees the general hygiene conditions under which the entire plant operates. Without solid GMP, no HACCP plan can fully compensate for that weak foundation.
Areas covered by GMP
Infrastructure and facilities
Hygienic plant design, easy-to-clean surfaces, physical separation between zones of different risk, pest control and adequate ventilation.
Personnel
Hygiene training, appropriate clothing, handwashing practices, and clear policies on when a sick worker should not handle food.
Process control
Validated cleaning and sanitation procedures, time and temperature control, and proper handling of raw materials and inputs.
Documentation
Records that make it possible to demonstrate, in an audit or inspection, that the above procedures are actually followed consistently, not just occasionally.
The relationship between GMP and microbiological verification
An environmental monitoring program or a finished-product verification program does not replace GMP: it verifies it. An out-of-limit microbiological result is usually, in practice, the sign that some basic manufacturing practice failed somewhere along the chain, rather than an isolated event with no identifiable cause.
Conclusion
Good Manufacturing Practices are not the most visible part of a food safety program, but they are the foundation without which no more sophisticated system — HACCP, GFSI certifications, environmental monitoring — can function sustainably over time.
About TAAG
Discover how TAAG's microbiological verification services help confirm, with laboratory evidence, that a plant's GMP is working.
Frequently asked questions
Is GMP legally mandatory?
In most countries, yes; it constitutes the minimum regulatory framework that any food plant must meet, regardless of whether it also seeks an additional voluntary certification.
What is the difference between GMP and HACCP?
GMP covers general hygiene and operating conditions; HACCP is a system that identifies and controls specific hazards at concrete critical points in the process, built on the assumption that GMP is already working correctly.
Does an out-of-limit microbiological result always indicate a GMP failure?
Not always, but it is the first hypothesis to investigate, since many microbiological deviations originate in cleaning failures, personnel handling or temperature control.