ISO/IEC17025 Laboratory System
1. Overview
ISO/IEC17025 is the laboratory management system standard released by the International Organization for Standardization. It serves as the basis for CNAS (China National Accreditation Service for Conformity Assessment) accreditation. Accredited laboratories can issue testing/calibration reports that are recognized in multiple countries and regions worldwide. ISO/IEC17025:2017, "General requirements for the competence of testing and calibration laboratories," is currently the most authoritative laboratory management system standard globally.
💡 Core Value: Through a systematic approach, ensure the achievement of quality objectives, reduce quality risks, and enhance customer satisfaction. CNAS accreditation demonstrates that the laboratory possesses internationally recognized technical capabilities, and its testing/calibration reports can be internationally recognized (ILAC-MRA), thereby increasing customer trust and market competitiveness.
2. Interpretation of Core Requirements of ISO/IEC17025
The standard is divided into two core parts:
| Chapter | Name | Core Requirements |
|---|---|---|
| Chapter 4 | General Requirements | Impartiality, confidentiality |
| Chapter 5 | Structural Requirements | Legal entity, organizational structure, management responsibilities |
| Chapter 6 | Resource Requirements | Personnel, facilities and environment, equipment, metrological traceability, external services |
| Chapter 7 | Process Requirements | Contract review, method validation, sampling, sample handling, result quality assurance, reporting |
| Chapter 8 | Management Requirements | Document control, record control, internal audit, management review, improvement |
3. Laboratory Management System Document Structure
The ISO/IEC17025 system documents adopt a four-layer pyramid structure:
- Level 1: Quality Manual — Describes the laboratory's quality policy, objectives, organizational structure, and responsibilities
- Level 2: Procedure Documents — Describes the processes and responsibilities of various activities (such as equipment management, internal audit, nonconformity control, etc.)
- Level 3: Work Instructions — Specific operating procedures, testing methods, and equipment operation guidelines
- Level 4: Record Forms — Original records, report templates, ledger forms
💡 Essential List of Procedure Documents: Document control, record control, internal audit, management review, nonconformity control, corrective action, preventive action, personnel training, equipment management, metrological traceability, method validation, sample management, result quality assurance, complaint handling, external service procurement, etc., over 20 procedure documents.
4. Equipment Management and Metrological Traceability
Equipment management is at the core of laboratory management, and it must ensure that all equipment can be traced to national or international standards.
Key Elements of Equipment Management
- Unique Equipment Identification: Each piece of equipment has a unique number
- Equipment Records: Purchase records, acceptance reports, user manuals, calibration certificates, maintenance records
- Metrological Traceability: Critical equipment must be calibrated by qualified metrological institutions
- Periodic Verification: Stability checks between two calibrations
- Status Identification: Three-color labels for qualified, conditionally used, and out-of-service equipment
5. Personnel Competency Requirements and Training System
Personnel competency is a core manifestation of the laboratory's technical capability.
Key Elements of Personnel Management
- Job Responsibilities: Clearly define the responsibilities of technical supervisors, quality supervisors, authorized signatories, and testers
- Qualifications: Education, major, work experience, training records
- Authorization Management: Authorization is required for testing projects, instrument operation, and report issuance
- Training System: Onboarding training, on-the-job training, external training, technical exchanges
- Supervision and Evaluation: Regular supervision, capability verification, skill assessment
💡 Requirements for Authorized Signatories
- Possess the relevant professional background and work experience
- Familiar with CNAS accreditation requirements
- Familiar with testing methods and procedures
- Capable of reviewing testing reports
- Must pass the CNAS on-site evaluation
6. Quality Control of Testing/Calibration Results
Quality control of results is crucial for proving the reliability of testing data.
Quality Control Methods
- Internal Quality Control: Quality control samples, repeat testing, personnel comparison, equipment comparison, retesting of retained samples
- External Quality Control: Capability verification, measurement audit, inter-laboratory comparison
- Control Plan: Develop an annual quality control plan covering all testing projects
- Result Evaluation: Statistical analysis, control chart monitoring, handling of nonconforming results
7. Method Validation and Confirmation
Non-standard methods must be confirmed, and standard methods must be validated.
| Method Type | Requirements |
|---|---|
| Standard Methods | Validation: Ensure that personnel, equipment, materials, methods, and environment meet requirements; validate detection limits, precision, and accuracy |
| Non-standard Methods | Confirmation: Technical confirmation, customer confirmation, expert review |
| Laboratory-developed Methods | Confirmation: Linearity, detection limits, recovery rate, precision, uncertainty assessment |
8. CNAS Accreditation Application Process and Review Points
The CNAS accreditation application process is divided into six stages:
- System Establishment: Establish the system according to ISO/IEC17025 requirements and operate it for more than 6 months
- Application Submission: Submit application materials through the CNAS website (quality manual, procedure documents, application capability list)
- Document Review: CNAS reviews the completeness of the documents and provides rectification suggestions
- On-site Review: The review team conducts an on-site review (3-5 days), including document review, on-site testing, and personnel interviews
- Rectification Closure: Develop corrective actions for nonconformities and submit evidence of rectification
- Approval and Certification: The CNAS evaluation committee approves and issues the accreditation certificate (valid for 6 years)
💡 Common On-site Review Checkpoints
- Has the system been operating for more than 6 months?
- Are the equipment within the calibration validity period? Have the calibration results been confirmed?
- Are personnel working with valid certifications? Are authorizations clearly defined?
- Have the methods been validated/confirmed?
- Are the original records standardized and traceable?
- Is the quality control plan being followed as scheduled?
- Are internal audits and management reviews effective?
9. Common Nonconformities and Countermeasures
⚠️ Common Nonconformities and Countermeasures
- Nonconformity 1: Equipment Calibration Not Confirmed → Establish a procedure for confirming calibration results, and ensure confirmation after each calibration
- Nonconformity 2: Unclear Personnel Authorization → Develop an authorization list, clearly defining the equipment and testing projects each person can operate
- Nonconformity 3: Irregular Modification of Original Records → Train personnel in proper record-keeping, requiring "crossing out and signing" for any modifications
- Nonconformity 4: Quality Control Plan Not Covering All Projects → Develop a quality control plan annually to ensure full coverage of all projects
10. ISO/IEC17025 Laboratory System Toolkit (Downloadable)
To help quickly establish the laboratory system, a complete set of practical toolkits has been compiled:
- ISO/IEC17025 Quality Manual Template
- Complete Set of Procedure Document Templates
- Equipment Management Ledger Template
- Personnel Records Template
- Quality Control Plan Template
- CNAS Application Material Checklist
11. Summary
💡 Key Elements for Successful Laboratory System Establishment
- Leadership Commitment: Management actively promotes and ensures adequate resource allocation
- Full Participation: Technical personnel and testers deeply participate in system documentation
- Practical Documents: Documents are closely aligned with actual work to avoid a disconnect
- Continuous Operation: The system is continuously operated, accumulating records for more than 6 months
- Thorough Internal Audits: Internal auditors are fully trained, and internal audits identify real issues and implement corrective actions
ISO/IEC17025 is the "international passport" for laboratory technical capabilities — obtaining accreditation means that your testing/calibration results are recognized worldwide. Accredited laboratories can issue testing/calibration reports that are recognized in multiple countries and regions, which is a core method for enhancing the laboratory's credibility and competitiveness.