Internal Audits in Laboratories Why They Often Miss Real Issues

Introduction

Internal audits are a key requirement of ISO/IEC 17025 and other ISO management systems.

They are intended to evaluate system effectiveness and identify areas for improvement.

However, in many laboratories, internal audits do not uncover the issues that actually impact performance.

Common Gaps in Internal Audits

1. Audits focus only on documentation
   Reviewing procedures without verifying actual practices.
2. Limited depth of audit questions
   Checklists are followed without deeper analysis.
3. Audits performed by untrained auditors
   Lack of understanding of technical and operational processes.
4. Familiarity bias
   Auditors avoid identifying issues in their own teams.
5. Findings are too general
   Lack of clear, actionable observations.

Why This Happens

• Internal audits seen as a formality
• Lack of time and resources
• Insufficient training of auditors
• Over-reliance on templates

What Effective Internal Audits Look Like

• Process-based audits (not only document review)
• Objective and independent evaluation
• Focus on real risks and issues
• Clear, specific findings
• Follow-up on corrective actions

Practical Steps to Improve

• Train auditors in process-based auditing
• Encourage open and objective evaluation
• Go beyond checklists — ask “why” and “how”
• Focus on actual practices, not just procedures
• Ensure follow-up on findings

Conclusion

Internal audits are one of the most valuable tools in any management system — but only if they are performed effectively.

Shifting from a checklist approach to a process-focused audit can significantly improve system performance.