HACCP's seven principles run from identifying hazards through documenting the entire system: hazard analysis, determining critical control points, establishing critical limits, monitoring, corrective action, verification, and record-keeping. Each one builds on the last, and together they form the operational core of any HACCP plan.
A HACCP plan that lists the seven principles by name but doesn't apply each one with real technical precision won't survive a genuine audit. The difference between a plan that passes and one that gets flagged usually comes down to exactly this kind of principle-by-principle detail, not the overall structure. This guide walks through each principle individually, with the practical detail a real HACCP plan actually needs. It is written by Maria Falbo, a Lead Auditor with decades of experience auditing food safety management systems.
The seven principles were formally finalized in 1997 by the US National Advisory Committee on Microbiological Criteria for Foods, and the Codex Alimentarius Commission subsequently adopted them as the internationally recognized framework still used today. For the full history of how HACCP developed, see our What Is HACCP? guide. This guide focuses specifically on the seven principles themselves; for the full twelve-step sequence including the five preliminary tasks that come before them, see our 12 Steps of Applying HACCP guide.
Each principle builds directly on the one before it. A hazard analysis identifies what needs controlling. A critical control point identifies where. A critical limit defines what "controlled" actually means in measurable terms. The remaining four principles — monitoring, corrective action, verification, and record-keeping — exist to confirm the first three are genuinely working, not just documented on paper.
A hazard analysis identifies every biological, chemical, and physical hazard reasonably likely to occur at each step of the process, from raw material intake through final distribution. The goal is identifying hazards significant enough that failing to control them could result in an unacceptable risk to the consumer.
This step depends entirely on the groundwork laid during the five preliminary tasks, particularly the process flow diagram, and on a functioning prerequisite program already being in place. Without an accurate, verified diagram of how the product actually moves through the facility, a hazard analysis is working from an inaccurate picture of the process it's supposed to protect. For more on that foundation, see our Prerequisite Programs guide.
A critical control point, or CCP, is a step where a control needs to be applied to prevent, eliminate, or reduce an identified hazard to an acceptable level. Not every step where a hazard was identified in Principle 1 qualifies as a CCP. A CCP decision tree exists specifically to make that distinction consistently, rather than leaving it to individual judgment.
Some hazards are actually controlled more effectively at a step further downstream than where they were first identified, and more than one hazard can sometimes be controlled by the same control measure. For a full walkthrough of identifying and monitoring CCPs specifically, see our Critical Control Points guide.
A critical limit is a value range — a temperature, a time, a pH level — that must be controlled at a CCP to keep an identified hazard at an acceptable level. Critical limits need a scientific basis, drawn from research or validated data specific to the actual process, not copied from a similar-looking operation without independent verification.
Many operations also set a tighter, more conservative target inside the critical limit — an early checkpoint that flags a process drifting in the wrong direction before it would ever actually breach the real limit. A critical limit without this buffer still functions correctly, but the margin for error is considerably thinner.
Our HACCP Training course covers hazard analysis, CCP determination, monitoring, and verification from the ground up.
Monitoring is a planned sequence of observations or measurements that confirms a CCP is staying within its critical limit, in real time, as production happens. Monitoring needs to be frequent enough, and precise enough, to catch a deviation while there's still time to act, not discovered after an entire batch has already left the facility.
Most monitoring relies on physical measurements rather than end-product testing, since a measurement taken during production catches a problem immediately, while testing a finished sample after the fact catches it too late.
The confusion I see most often at this stage of a HACCP plan is treating monitoring and verification as the same activity. They aren't. Monitoring checks whether today's production is staying within the critical limit, in real time. Verification asks a different question: is the whole system — the limits themselves, the monitoring frequency, the plan as written — actually working the way it's supposed to. The verification is always performed by a different function than the monitoring.
A corrective action is what happens when monitoring shows a CCP has deviated from its critical limit. Two things need to happen, not just one: the affected product needs to be identified and dealt with appropriately, and the underlying cause of the deviation needs to be identified and corrected so the same failure doesn't repeat.
A corrective action that only addresses the affected product without asking why the deviation happened in the first place isn't a complete corrective action. It's a symptom fix that leaves the actual cause untouched.
The gap I see most often here is a corrective action log full of entries that all say essentially the same thing — "retrained the operator" — without ever asking why a trained operator made the same mistake more than once. If a deviation keeps recurring despite repeated retraining, the real cause usually isn't the operator.
Verification confirms that the HACCP plan is working the way it was designed to, using methods beyond the routine monitoring already happening at each CCP. This includes reviewing monitoring and corrective action records and periodically reviewing the entire plan for completeness, particularly after any change to the process, equipment, or ingredients.
Verification is what catches a plan that looks correct on paper but has quietly drifted from reality — such as a monitoring frequency that sounded reasonable initially but doesn't genuinely identify deviations in practice.
Record-keeping covers the hazard analysis itself, the completed HACCP plan, and the records generated by monitoring, corrective actions, and verification as the system operates. Without completed records, none of the preceding six principles can be demonstrated to an auditor. A CCP that was monitored correctly but never documented is functionally indistinguishable, from an audit's perspective, from one that was never monitored at all.
Records need to be specific, dated, and tied to the actual event, not reconstructed from memory afterward. A record created after the fact to fill a gap is a different kind of problem than a missing record, and auditors are generally trained to recognize the difference.
Yes, all seven apply to any HACCP plan, though the specific detail within each principle scales to the complexity of the process. A simple process may have few CCPs and straightforward monitoring; a complex one may have several, each with its own detailed monitoring and verification requirements.
Monitoring, Principle 4, checks whether a specific CCP is staying within its critical limit during actual production. Verification, Principle 6, confirms the entire system, including the limits and monitoring methods themselves, is working as designed.
Yes. A single CCP — a cooking step, for example — can sometimes control more than one identified hazard simultaneously.
Maria Falbo has over 25 years of experience working as a Lead Auditor for certification bodies worldwide. She founded Logix ISO with the mission of making expert-level ISO training accessible to organizations of all sizes. Her work spans Quality, Environmental, Occupational Health and Safety, Food Safety, Automotive, and Energy management systems.
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