Verification, Validation and Recordkeeping
Validation proves the design; verification proves it works
These two words are the most commonly swapped pair in HACCP examinations. Validation asks: is this control measure capable of achieving the intended effect? It is done before the plan is implemented and whenever a change occurs - new product, new equipment, new critical limit, new supplier. Evidence comes from challenge studies, published D- and z-values, process-authority letters, or in-plant heat-distribution trials. Verification asks: is the plan being followed, and is it still effective? It happens continuously: calibration, CCP record review, product and environmental testing, internal audits, complaint trending, and periodic reassessment of the whole plan.
Recordkeeping closes the loop. Records must be dated and signed by the person who made them, and reviewed by someone with authority - ideally not the person who performed the task. Retention should exceed the product's shelf life and meet the local legal minimum. Keep hazard-analysis rationale, CCP monitoring logs, deviation and disposition records, calibration records, validation studies, verification and audit reports, and training records.
Traps: calling an annual record review “validation”; describing a challenge study as “verification”; records bearing no reviewer signature; and forgetting that any change in ingredient, process, equipment or supplier is a trigger to revalidate before the change goes live.
Worked example: a plant adds a blanching step. Validation: a challenge study or literature D-value plus an in-plant temperature-distribution trial confirming the worst-case location reaches target. Verification: daily review of blanching logs, periodic product testing, and probe calibration.