ISO 17025 Audit Preparation Guide

ISO 17025 ensures technical competence of testing laboratories. Proper preparation reduces non-conformities and audit stress.

Key Technical Requirements

• Documented procedures (SOPs)
• Calibration traceability
• Measurement uncertainty records
• Equipment maintenance logs
• Method validation reports

Calibration & Traceability

• Use certified reference materials
• Maintain calibration certificates
• Track instrument ID & serial numbers
• Follow calibration schedule
• Review drift trends

Quality Control Monitoring

• Control charts maintained
• Corrective actions documented
• Out-of-control investigations logged
• Repeatability studies recorded
• Proficiency testing participation

Common Audit Findings

• Unupdated uncertainty calculations
• Missing calibration certificates
• Incomplete maintenance records
• Improper documentation control
• No evidence of corrective action

Audit Day Checklist

1. Ensure all SOPs are current
2. Verify calibration validity dates
3. Prepare uncertainty documentation
4. Check control chart updates
5. Confirm equipment labels
6. Ensure staff competency records are available

Audit success depends on documentation discipline and technical consistency.