EHAI Primary Food Safety common mistakes
EHAI Primary Food Safety · Understand the traps and how to avoid them.
Treating HACCP as a stand-alone paperwork exercise and writing a plan that lists hazards without linking each one to a measured control, a critical limit, and a monitoring frequency.
Candidates memorise the seven principles as a list and then draft plans from a template, so they reproduce headings instead of building the hazard analysis first and deriving controls from it. The exam scenario questions reward the logic chain, not the headings.
What to do instead
Before writing any answer, build a one-page hazard table: process step, hazard (biological, chemical, physical), likelihood and severity, control measure, critical limit with a number and unit, monitoring method and frequency, corrective action, verification record. Practise converting three sample recipes (a cooked-chilled dish, a raw ready-to-eat salad, a fermented product) into this table until the chain is automatic.
Confusing a critical control point with a control point or a prerequisite programme, and labelling steps such as receiving, pest control, or staff handwashing as CCPs.
Every important step feels critical to a candidate, and training material often presents prerequisite programmes and CCPs side by side without forcing the decision test. Exam items deliberately include plausible non-CCP steps to test the distinction.
What to do instead
Apply the Codex decision tree explicitly in practice: is there a control measure at this step, is the step specifically designed to eliminate or reduce the hazard to an acceptable level, could a later step control it? If a later step or a prerequisite programme controls the hazard, it is not a CCP. Drill ten process steps and justify each yes or no in one sentence.
Writing critical limits that are vague or unitless, such as 'cook thoroughly', 'keep cold', or 'high temperature', instead of a measurable value with a unit and a stated basis.
Candidates translate kitchen language directly into plan language, and they have not internalised that a critical limit must be measurable in real time by a named method. The exam tests whether the limit can actually be monitored and defended.
What to do instead
For every critical limit, write three things: the parameter with unit (for example core temperature of 75 degrees Celsius for at least 15 seconds, or pH 4.6 or below, or water activity 0.85 or below), the measurement method and instrument, and the source or validation basis. Reject any limit you cannot measure on the line at the moment the step occurs.
Choosing a monitoring frequency and responsible person that cannot detect a loss of control, for example checking cooler temperature once per week or recording cook temperatures retrospectively from memory at end of shift.
Candidates focus on what to measure and skip who, when, and how often. They also underestimate how quickly a deviation becomes a food safety event, so weekly or end-of-shift checks look adequate on paper.
What to do instead
Tie frequency to how fast the hazard changes: continuous recording or every batch for cook steps, at least start and end of shift plus alarm checks for cold storage, every delivery for receiving. Name the role, not a person, and state what the monitor does when the reading is outside the limit before the shift ends.
Describing corrective action only as 'discard the product' and omitting the other required elements: restoring control, determining and correcting the root cause, assessing the affected product, and recording the event.
Discarding feels like the safe answer and is easy to remember, so candidates stop there. Exam items probe whether the candidate understands corrective action as a system response, including disposition of product made since the last good check.
What to do instead
Use a fixed four-part answer for every corrective action: bring the process back into control, decide the fate of affected product with a justification, identify and fix the cause, and record who, what, when, and the verification. Practise writing corrective actions for a failed cook, a failed chill, and a failed metal detector test.
Mixing up verification and validation, for example calling a daily temperature check 'validation' or claiming that reviewing records validates a critical limit.
The two words sound interchangeable in everyday use, and candidates learn them as vocabulary rather than as different activities with different timing and evidence. The exam uses scenario wording that only makes sense if the distinction is clear.
What to do instead
Anchor the distinction: validation asks whether the control would work and happens before or when the plan changes, using scientific basis, challenge testing, or literature. Verification asks whether the plan is being followed and is working, using record review, calibration, product testing, and audits. Sort ten example activities into the two columns until it is reflex.
Producing a hazard analysis that lists only biological hazards and ignores chemical and physical hazards, or that ignores hazards introduced by the process itself such as allergen cross-contact, cleaning chemical residue, or metal fragments from equipment.
Food safety training and media coverage concentrate on pathogens, so biological hazards dominate recall. Candidates also analyse raw ingredients only and forget hazards arising from equipment, packaging, and people.
What to do instead
Walk every process step and ask three questions: what biological, chemical, and physical hazard could be introduced here; what could survive or multiply here; what could cross-contaminate here. Include allergens explicitly as a chemical hazard with cross-contact routes. Build a checklist with all three hazard types as column headers so none is skipped.
Applying a single time-temperature combination to every food without regard to the food's characteristics, for example using the same cook limit for a whole muscle roast and a comminuted meat product, or ignoring pH and water activity when deciding whether a step is a CCP.
Candidates memorise one reference temperature and reuse it, missing that lethality depends on the matrix, particle size, fat content, and intrinsic factors. Scenario items are built around exactly these differences.
What to do instead
For each product, state the intrinsic factors (pH, water activity, salt, preservatives), the physical form, and the intended use, then select the limit and cite the basis. Practise explaining why a given time-temperature is adequate for one product and not another, and why a low-pH or low-water-activity product may need fewer CCPs.
Ignoring the cold chain and the cooling step as a distinct hazard control, for example treating refrigeration as background infrastructure rather than a controlled step with its own limits and monitoring.
Refrigeration is invisible when it works, and candidates concentrate on cooking as the dramatic kill step. They forget that cooling from cooking temperature through the danger zone is one of the highest-risk periods in many operations.
What to do instead
Write cooling as its own step with explicit limits and timeframes from the applicable guidance, for example from 57 to 21 degrees Celsius within two hours and then to 5 degrees Celsius within a further four hours, and state the monitoring method and the corrective action if the timeframe is missed. Do the same for cold holding, thawing, and transport.
Answering recall questions about prerequisite programmes with generic statements, such as 'staff must be trained' or 'the facility must be clean', instead of naming the specific requirement, record, or frequency the question is testing.
Candidates run out of specific knowledge on prerequisite programmes and fill space with safe generalities, which score nothing. They also under-revise prerequisites because they assume the exam is only about the seven principles.
What to do instead
Build a one-page prerequisite reference covering personal hygiene, handwashing facilities, training records and frequency, cleaning and sanitation schedules with verification, pest control, water quality, waste, maintenance and calibration, supplier approval, traceability and recall, and allergen management. For each, write the specific requirement and the record that proves it, then self-test from the reference without looking.