A certificate shows that someone passed a test at some point. Competency is whether they can do the job now, to the required standard, in the conditions of your site. The gap between the two causes many of the failures employers see after deployment. Technical competency assessment closes it by testing what the worker can actually do. The methods below, and the way they combine, apply to selection teams, HR managers and technical leads assessing industrial workers.
What is technical competency assessment?
Technical competency assessment is the structured evaluation of a worker’s knowledge, practical skill and judgment against a defined standard for a specific role. It produces a recorded decision, competent or not yet competent, backed by evidence that an independent reviewer could check.
The four main assessment methods
1. Knowledge tests
Written or oral questions on theory, codes, drawings, safety rules and procedures. They are quick and cheap to run in groups and useful for screening, but knowing the answer is not the same as being able to do the work.
2. Practical tests
The candidate performs a defined task to a standard under observation: welding a coupon, fitting a spool section, terminating a cable or aligning a pump. For craft roles, this is the core of the assessment.
3. Observed work
The assessor watches the worker perform real tasks on the job, often during an initial period on site. It reveals habits, pace and safety behavior that a test booth cannot.
4. Structured interviews
A fixed set of technical and situational questions, asked the same way of every candidate and scored against model answers. They are particularly useful for supervisors, inspectors and technicians whose work involves judgment.
Choosing the right mix
| Role | Knowledge test | Practical test | Structured interview |
|---|---|---|---|
| Welder | Short, on procedures and defects | Essential: coupon to the project procedure | Brief |
| Pipe fitter | Drawings and tolerances | Essential: fit-up from an isometric | Brief |
| Electrician | Regulations and hazardous areas | Terminations and testing | Moderate |
| Instrument technician | Signals and calibration theory | Calibration and loop simulation | Moderate |
| Foreman or supervisor | Planning and safety rules | Optional | Essential |
| QA/QC inspector | Codes and acceptance criteria | Defect identification exercise | Essential |
Making assessments fair and repeatable
- Write the standard first. Define what “competent” looks like before the assessment, including acceptance criteria for practical work.
- Use the same test for everyone applying for the same role.
- Use qualified assessors who know the trade and the standard, not general HR staff.
- Score against criteria, not impressions. A simple rating scale per criterion reduces bias.
- Separate assessment from recruitment targets. An assessor under pressure to fill positions will pass borderline candidates.
A simple rating scale
| Rating | Meaning |
|---|---|
| 3: Competent | Meets the standard without supervision |
| 2: Competent with supervision | Meets the standard with guidance; suitable with a strong foreman |
| 1: Not yet competent | Does not meet the standard; may be suitable after training |
| 0: Unsuitable | Significant gaps; not suitable for this role |
A rating of 2 is not a failure. Many crews include workers at that level, provided supervision is planned around them rather than discovered after the fact.
Record evidence that stands up
Keep test results, NDT or inspection reports, photographs of practical work, interview score sheets and the assessor’s name and signature. Evidence lets the client approve quickly, supports any later dispute, and shows whether assessment results actually predict site performance.
Competency is not permanent
Skills fade when they are not used, and standards change. Re-assess workers returning after long breaks or moving to different materials or equipment. For welders, the continuity rules in codes such as ASME Section IX already require evidence that the process has been used recently.
Criteria for specific trades are set out in screening criteria for welders, fitters and technicians, and the overall selection process in industrial manpower selection and competency services. For positions on oil and gas projects, see technical roles needed for oil and gas projects.
Apex Core Engineering assesses candidates through technical evaluation, including interviews, skills testing and credential verification, as part of its manpower selection services.
Frequently asked questions
What is the difference between competency and qualification?
A qualification is a formal record that someone passed a course or test. Competency is the demonstrated ability to perform the work to standard now.
How long does a practical trade test take?
It depends on the trade and the test piece. Many tests take a few hours, plus time for inspection or NDT of the result.
Who should assess technical competency?
A qualified assessor with experience in the trade and knowledge of the applicable standard.
Ask Apex Core Engineering about competency assessment for your workforce.