Internal Auditing for Food Manufacturing

Internal Auditing for Food Manufacturing

Find the real gaps. Gather objective evidence. Turn audit findings into lasting improvements.

Internal auditing should be much more than checking whether paperwork is complete. An effective audit examines whether food safety systems are understood, implemented and working on the factory floor. This practical guide draws on the themes of Boyd Quality Management’s Internal Auditor for Food Manufacturing training.

What Is an Internal Audit?

An internal audit is a structured assessment of activities and systems against defined requirements. These may include a site’s own procedures, HACCP and prerequisite programmes, BRCGS Food Safety requirements and customer standards. The purpose is to verify effective implementation, identify weaknesses and support continual improvement.

1. Plan an Audit Programme Based on Risk

Define the scope, criteria, auditor, timing and frequency. Use product and process risks, previous audit performance, customer requirements, complaints and recurring issues to determine priorities. The programme should cover relevant systems and factory activities, not just the easiest areas to audit.

2. Audit the System, Not the Person

Strong auditors are independent, objective, observant and constructive. They listen carefully, ask open questions and test whether what is written matches what actually happens. Avoid blame, assumptions and personal opinions; base findings on verifiable evidence.

3. Follow the Process on the Factory Floor

Review procedures and records, observe normal operations, speak with people doing the work and trace examples through the process. Depending on scope, this might include HACCP, traceability, cleaning, maintenance, allergen controls, product checks, concessions or corrective actions. Look for inconsistencies between shifts, departments and documented methods.

4. Gather Objective Evidence

Record exactly what was observed, checked or confirmed, and compare it with the agreed audit criteria. An effective report explains conformity as well as non-conformity. Clear evidence helps teams understand the risk and respond appropriately.

5. Report Non-Conformities Constructively

Describe the requirement, the factual evidence and the gap. Agree responsibility and timescales for action. Avoid vague findings that are difficult to investigate or close out.

6. Verify That Corrective Actions Work

Closing an audit finding is not simply recording that a task was completed. Establish the cause where appropriate, address it, verify implementation and check that the problem has not recurred. Trend audit findings and feed the learning into management review and the wider food safety system.

BRCGS Food Safety and Internal Audits

The training presentation covers BRCGS Food Safety Issue 9, Section 3.4, including risk-based audit scheduling, auditor competence and independence, objective evidence, corrective action and separate hygiene and fabrication inspections. Sites should always consult the applicable current standard and customer requirements for exact obligations.

Practical Questions to Ask

  • Are our audits focused on the areas of greatest risk?
  • Can we show that auditors are competent and independent of the work being assessed?
  • Do we compare procedures with what actually happens during production?
  • Are findings specific, evidence-based and useful to the people responsible?
  • Do we verify that corrective actions prevent recurrence?

Develop Your Internal Auditing Skills

Boyd Quality Management provides practical internal auditor training for food manufacturing teams, built around realistic factory situations, auditor behaviours, evidence gathering, reporting and corrective action.

Explore our Food Safety Training Courses, return to Practical Food Safety Solutions, or discuss your requirements.