Common ISOIEC 17025 Findings in Analytical Laboratories (And How to Avoid Them)
April 13, 2026
Introduction
ISO/IEC 17025 defines the requirements for competence, impartiality, and consistent operation of laboratories.
Most laboratories implement systems to meet these requirements. However, during audits, similar findings tend to appear repeatedly.
Understanding these common issues can help laboratories strengthen their systems and avoid recurring nonconformities.
Common Findings in Laboratories
- Incomplete or inconsistent records
Missing data, unclear entries, or lack of traceability in test records. - Issues with equipment calibration and maintenance
Calibration not performed on time or lack of clear linkage to measurement traceability. - Weak control of documents
Use of outdated procedures or uncontrolled forms. - Method validation and verification gaps
Insufficient evidence supporting method performance. - Training and competency not fully demonstrated
Training records exist, but competency is not clearly evaluated or documented.
Why This Happens
- High workload and time pressure
- Over-reliance on documentation rather than process understanding
- Lack of periodic system review
- Limited internal audit effectiveness
What Effective Systems Look Like
- Clear, complete, and traceable records
- Structured calibration and maintenance programs
- Strong document control practices
- Well-documented method validation/verification
- Demonstrated competency (not just training records)
Practical Steps to Improve
- Perform regular internal audits focused on real practices
- Review records for completeness and traceability
- Strengthen equipment management systems
- Ensure methods are supported by proper data
- Move beyond training → verify competency in practice
Conclusion
Many ISO/IEC 17025 findings are not complex — they result from gaps between procedures and actual practice.
Focusing on consistency, traceability, and real implementation can significantly improve laboratory performance and audit outcomes.