CHA Verification & Validation of HACCP Systems 2 — Questions and Answers
Question 1: Which document provides the primary scientific basis for validating a thermal kill CCP for a meat product?
- A supplier certificate of conformance
- Published pathogen D-value and z-value data from peer-reviewed literature (Correct answer)
- An internal audit report
- A customer complaint log
Correct answer: Published pathogen D-value and z-value data from peer-reviewed literature
Validation relies on scientific data such as published D-values and z-values to confirm a thermal process achieves the required log reduction of target pathogens.
Question 2: When a HACCP team modifies a critical limit at a CCP, what is the required next step before resuming production?
- Notify the local health authority immediately
- Revalidate the HACCP plan to confirm the new limit controls the hazard (Correct answer)
- Conduct a customer survey
- Update the employee training log only
Correct answer: Revalidate the HACCP plan to confirm the new limit controls the hazard
Any change to a critical limit requires revalidation to ensure the modified limit still effectively controls the identified hazard.
Question 3: A HACCP auditor reviews calibration records for a thermometer used at a cooking CCP and finds calibration was last performed 14 months ago, exceeding the 6-month requirement. This is BEST classified as:
- A critical limit deviation
- A prerequisite program failure
- A verification procedure non-conformance (Correct answer)
- A validation data gap
Correct answer: A verification procedure non-conformance
Overdue calibration of a monitoring instrument is a failure of the verification procedure requiring that equipment remain calibrated per schedule.
Question 4: In HACCP terminology, 'challenge testing' using inoculated pack studies is an example of:
- Corrective action documentation
- Validation of a critical control point (Correct answer)
- Monitoring at a control point
- Internal audit evidence
Correct answer: Validation of a critical control point
Inoculated pack studies challenge the process with target organisms to scientifically confirm the CCP achieves the required hazard reduction, which is validation.
Question 5: Which of the following is a VERIFICATION activity in an ongoing HACCP system?
- Establishing the critical limit for pH at a CCP
- Conducting a hazard analysis for a new ingredient
- Reviewing CCP monitoring records for completeness and correctness (Correct answer)
- Designing the product formulation
Correct answer: Reviewing CCP monitoring records for completeness and correctness
Reviewing CCP monitoring records is a verification activity that confirms the HACCP system is being implemented as planned.
Question 6: A facility uses pH as a CCP to control Clostridium botulinum. The validation study was completed 5 years ago. What should trigger a revalidation?
- Routine annual scheduling only
- A change in the acidulant supplier or acidification process (Correct answer)
- A positive allergen test result
- An employee turnover rate exceeding 20%
Correct answer: A change in the acidulant supplier or acidification process
A change in the acidulant supplier or process can affect the pH achieved, necessitating revalidation to confirm the hazard is still controlled.
Question 7: Which regulatory framework in the U.S. mandates HACCP verification activities including records review and direct observation for seafood processors?
- 21 CFR Part 117 (FSMA Preventive Controls)
- 21 CFR Part 123 (Seafood HACCP) (Correct answer)
- 9 CFR Part 417 (Meat and Poultry HACCP)
- 21 CFR Part 120 (Juice HACCP)
Correct answer: 21 CFR Part 123 (Seafood HACCP)
21 CFR Part 123 specifically governs seafood HACCP and mandates verification procedures including records review and direct observation.
CHA Verification & Validation of HACCP Systems 2
Which document provides the primary scientific basis for validating a thermal kill CCP for a meat product?