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ISO/TS 25108:2018 — Non-Destructive Testing Personnel Training Organizations
Quality Management and Operational Requirements for NDT Training Providers
Setting the Standard for NDT Training Providers
The effectiveness of non-destructive testing (NDT) personnel depends directly on the quality of training they receive. While ISO/TS 25107 defines the what — the syllabus content — ISO/TS 25108:2018 defines the how: the organizational framework, quality management, facilities, and instructor qualifications that a training organization must have in place to deliver effective NDT education. Together, these two documents form the backbone of global NDT personnel competence assurance. A training organization that follows ISO/TS 25108 demonstrates a commitment to educational quality that directly benefits students, employers, and the broader industrial community through consistently competent NDT practitioners.
Even the best syllabus is worthless without a competent organization to deliver it. ISO/TS 25108 ensures that training providers themselves meet quality standards — a principle of certification before teaching certification.
Core Organizational Requirements
Quality Management System
The standard mandates that every NDT training organization shall have a documented quality management system (QMS), with ISO 9001 cited as an example of a suitable framework. The QMS must cover all aspects of training service delivery, be periodically reviewed, and ensure that personnel performing work affecting NDT training quality have the necessary competence. Training organizations must determine competence requirements, provide training to fill gaps, and evaluate the effectiveness of those actions.
Management Structure
A designated person must be appointed for overall management of the training centre and courses. A separate person should be responsible for establishing and maintaining the QMS. This separation of operational and quality responsibilities is a deliberate design to prevent conflicts of interest between course delivery targets and quality assurance objectives.
| Organizational Element | Requirement | Implementation Guidance |
|---|---|---|
| Quality management | Documented QMS, periodic review | ISO 9001 alignment recommended |
| Management responsibility | Appointed training manager | Separate from quality manager |
| Student induction | Clear information on prerequisites, fees, assessment | Written policies before enrolment |
| Student assessment | Validated tests, progress monitoring | Separate from certification exams |
| Instructor qualification | Minimum Level 2 or 3, with teaching competency | Industry experience required |
| Facilities | Adequate lab space, equipment, specimens | Method-specific requirements |
| Technical library | Current standards, codes, reference materials | Accessible to all students |
| Training records | Retained for defined period | Traceability and audit readiness |
Curriculum Development and Delivery
Designing Effective Training
The standard outlines a systematic four-stage training process: (a) defining training needs, (b) designing and planning training, (c) providing training, and (d) evaluating outcomes. Training objectives must be based on the expected competencies and should address training needs, student profiles, training methods, content outlines, lesson plans, duration, required resources, and delivery mode. The curriculum must clearly define learning outcomes — what the student will be able to achieve as a result of the training.
E-Learning Provisions
Annex B of the standard provides guidelines for e-learning delivery, recognizing the growing role of digital education in NDT training. E-learning can be used for theoretical components, but the organization must ensure that practical hands-on training remains a mandatory element. The e-learning system must include mechanisms for student-instructor interaction, progress tracking, and assessment validation.
A particularly important aspect of the standard is its requirement for structured student induction. Before training begins, students must receive unambiguous information on prior knowledge requirements (mathematics, materials science, radiation safety), training fees and payment methods, assessment criteria, and certification pathways. This upfront transparency ensures that students understand what is expected of them and can make informed decisions about their training investment. The standard also mandates that student assessments be validated and conducted separately from certification examinations, maintaining the independence of the qualification process.
E-learning is a supplement, not a replacement. The standard explicitly maintains that practical competence verification requires hands-on training with real equipment and test specimens under qualified supervision.
Instructor and Facility Requirements
Instructor Competence
Instructors must hold at least Level 2 certification in the methods they teach (Level 3 is recommended for advanced courses) and demonstrate teaching competency. The training organization is responsible for evaluating instructor effectiveness and providing pedagogical training where needed. This dual emphasis on technical expertise and teaching ability recognizes that subject matter expertise alone does not guarantee effective knowledge transfer.
Training Specimens and Equipment
The standard requires that training organizations maintain an adequate collection of test specimens containing both natural and artificial discontinuities, covering the range of product types and industries relevant to the training. NDT equipment must be in good working order, calibrated, and representative of current industrial practice. Students must have sufficient hands-on access to develop practical competence — a critical requirement that distinguishes effective training from purely theoretical instruction.
Well-designed training specimens with known discontinuities are the NDT equivalent of flight simulators: they allow students to encounter realistic inspection challenges in a controlled learning environment before facing real-world responsibility.
Frequently Asked Questions
Q: How does ISO/TS 25108 differ from ISO/TS 25107?
A: ISO/TS 25107 specifies the syllabus content — what topics must be taught for each NDT method and level. ISO/TS 25108 specifies the organizational framework — how training organizations must be structured, managed, and equipped to deliver that syllabus effectively.
A: ISO/TS 25107 specifies the syllabus content — what topics must be taught for each NDT method and level. ISO/TS 25108 specifies the organizational framework — how training organizations must be structured, managed, and equipped to deliver that syllabus effectively.
Q: Is ISO 9001 certification mandatory for NDT training organizations?
A: ISO/TS 25108 does not mandate ISO 9001 certification specifically, but it requires a documented quality management system. ISO 9001 is cited as an example of a suitable framework that would satisfy the requirement.
A: ISO/TS 25108 does not mandate ISO 9001 certification specifically, but it requires a documented quality management system. ISO 9001 is cited as an example of a suitable framework that would satisfy the requirement.
Q: What qualifications must NDT instructors hold?
A: Instructors must hold at least Level 2 certification in the NDT methods they teach, with Level 3 recommended for advanced courses. Additionally, they must demonstrate teaching competence — subject matter expertise alone is not sufficient.
A: Instructors must hold at least Level 2 certification in the NDT methods they teach, with Level 3 recommended for advanced courses. Additionally, they must demonstrate teaching competence — subject matter expertise alone is not sufficient.
Q: Can online training fully satisfy NDT personnel training requirements?
A: No. While theoretical components may be delivered via e-learning, practical hands-on training with real equipment and test specimens under qualified supervision remains mandatory. E-learning is a supplement to — not a replacement for — practical instruction.
A: No. While theoretical components may be delivered via e-learning, practical hands-on training with real equipment and test specimens under qualified supervision remains mandatory. E-learning is a supplement to — not a replacement for — practical instruction.
In essence, ISO/TS 25108:2018 ensures that NDT training organizations operate to a consistent global standard, providing the institutional quality framework needed to make the training syllabuses of ISO/TS 25107 effective in practice. This dual-standard approach — syllabus plus organizational requirements — is a model that could benefit many other technical training domains beyond NDT.
