In our recent article, we explored why technician capability should be treated as an operational variable alongside equipment, processes, maintenance strategy, planning and other factors that influence performance.

But that raises another important question.

What happens when two technicians appear almost identical on paper — but perform very differently in the field?

Same job title.

Same certifications.

Similar experience.

Yet one diagnoses faults faster, requires less supervision, produces less rework and can confidently handle more complex tasks.

The other may require more support, take longer to reach the same diagnosis or struggle when a task moves beyond familiar conditions.

Neither technician is necessarily untrained or unqualified.

But their demonstrated capability is different.

That distinction matters because workforce capability is not binary. Technicians do not simply fall into two categories of “competent” and “not competent”. Capability develops across different technical disciplines, tasks, equipment, environments and levels of complexity.

If organizations only look at job titles, years of experience and certification records, those differences can remain largely invisible.

KEY TAKEAWAY / TL;DR: Two technicians can hold the same certifications, have similar experience and occupy the same role while demonstrating very different levels of practical capability. One may troubleshoot faster, work more independently, produce higher-quality work or handle more complex tasks. Training and certification provide essential evidence, but organizations also need to understand demonstrated competency. Benchmarking, structured assessment and performance evidence provide a clearer picture of what each technician can actually do — allowing development, supervision and deployment decisions to be based on capability rather than assumption.

SAME CERTIFICATE DOES NOT MEAN IDENTICAL CAPABILITY

Standardized training and certification are essential to the energy industry.

They establish common learning requirements, create consistency and provide evidence that technicians have successfully completed defined programs.

Within wind, for example, the Global Wind Organisation Taxonomy Framework connects learning objectives with knowledge, skills and abilities to create coherent, internationally comparable training outcomes.

But standardized training does not mean that every participant will subsequently develop exactly the same capability.

Think about almost any skilled activity.

Two people can receive the same instruction.

Both can successfully complete the required assessment.

Both can accumulate similar amounts of experience.

Yet over time, their ability to interpret situations, diagnose problems, make decisions and perform complex tasks can diverge considerably.

Energy technicians are no different.

That is why certification should be viewed as an important piece of workforce evidence — rather than a complete description of an individual’s capability.

CAPABILITY IS NOT BINARY

One of the limitations of traditional workforce records is that they often reduce capability to simple yes/no data.

Course completed? Yes.

Certification current? Yes.

Three years’ experience? Yes.

Job title? Technician Level 2.

Those data points are useful.

But consider two Level 2 technicians.

Technician A may be particularly strong in electrical troubleshooting but require further development in mechanical systems.

Technician B may be excellent at planned maintenance and mechanical fault finding but require support with more complex electrical diagnostics.

Which technician is more capable?

The question is too simplistic.

Capability needs to be understood in relation to the work being performed.

This principle is particularly clear in electrical safety. NFPA 70E recognizes that a person can be qualified with respect to certain equipment and tasks while remaining unqualified for others. Its requirements also identify task-relevant skills including hazard identification, risk assessment and decision-making. Review NFPA 70E material relating to qualified persons.

That provides a useful principle well beyond electrical work:

Capability has context.

WHY DO EQUALLY QUALIFIED TECHNICIANS PERFORM DIFFERENTLY?

There is rarely one explanation.

Technician performance develops through a combination of formal training, practical experience, frequency of task execution, equipment exposure, supervision, mentoring, problem-solving opportunities and individual development.

Consider two technicians who completed the same technical training three years ago.

Since then, one has repeatedly worked on complex faults alongside experienced senior technicians.

The other has primarily performed predictable preventative maintenance tasks.

Their time in role may be identical.

Their certifications may be identical.

Their practical experience is not.

This is supported by recent research into maintenance technicians working in complex industrial environments.

A 2026 study examining maintenance technicians in lithium-ion battery production identified a broad combination of knowledge, skills and abilities required for effective technician performance. These included electrical and mechanical skills, troubleshooting, digital tools, analytical reasoning, interdisciplinary thinking and continuous learning.

The researchers also found that hands-on experience takes significant time to develop and highlighted the importance of practical experience alongside formal technical education. Read the 2026 research into maintenance technician attributes and training needs.

That matters enormously for workforce management.

Years of experience tell you how long somebody has been working. They do not necessarily tell you what they have become capable of doing during that time.

1. ONE TECHNICIAN MAY DIAGNOSE FAULTS FASTER

Troubleshooting is one of the clearest examples of capability variation.

Following a known maintenance procedure and diagnosing an unknown fault are fundamentally different activities.

Troubleshooting requires technicians to combine:

• technical knowledge;
• equipment familiarity;
• logical reasoning;
• previous experience;
• test equipment;
• technical documentation;
• pattern recognition; and
• judgement.

A stronger troubleshooter may quickly eliminate unlikely causes, recognize a familiar failure pattern and select the appropriate test sequence.

Another technician may work through the same problem much more slowly, require support or replace components before identifying the underlying fault.

The 2026 maintenance research referenced above identified troubleshooting as one of the most important technician skills because identifying root causes and resolving machine problems directly affects restoration time and production efficiency.

It also found that technicians with stronger analytical reasoning were considered better able to diagnose breakdowns and identify root causes.

This is where the workforce question becomes operational:

Do you know who your strongest troubleshooters actually are?

2. ONE MAY REQUIRE LESS SUPERVISION

Independence is another important dimension of capability.

Two technicians may both be able to complete a task successfully.

But one may require regular guidance, checking or escalation while another can perform the work safely and consistently with much greater independence.

That difference has implications for:

• supervisor capacity;
• crew composition;
• deployment;
• remote working;
• shift planning;
• technician progression; and
• authorization.

Importantly, needing supervision is not necessarily evidence of poor performance.

It may simply indicate where a technician currently sits on their development pathway.

NFPA 70E provides a useful example of this principle. Its provisions recognize on-the-job development under direct supervision for people building the skills and knowledge required for qualified-person status on specific duties.

Development therefore should not be viewed as:

Not capable → capable.

It is more realistically:

Learning → supervised application → demonstrated competency → increasing independence → greater task complexity.

3. ONE MAY COMPLETE WORK TO A HIGHER STANDARD

Completing a task is not necessarily the same as completing it well.

Quality differences can appear in:

• inspection accuracy;
• component installation;
• torque application;
• testing;
• documentation;
• fault diagnosis;
• attention to abnormal conditions;
• procedure compliance; and
• handover quality.

Those differences may initially appear small.

But across hundreds or thousands of maintenance activities, small variations in execution can potentially become significant operational differences.

This is one reason our earlier article, COULD WORKFORCE CAPABILITY BE AFFECTING YOUR OPERATIONAL PERFORMANCE?, argued that workforce capability should be investigated alongside other variables when organizations examine quality, reliability, downtime and productivity.

The question is not whether every quality issue is caused by technician capability.

It clearly is not.

The question is whether capability is being measured well enough to determine when it is contributing.

4. ONE MAY PRODUCE LESS REWORK

Rework can expose differences that training records cannot.

Imagine two technicians completing the same category of maintenance activity.

Both jobs are recorded as complete.

But one technician’s work routinely requires no further intervention.

The other’s work is more frequently followed by:

• repeat faults;
• additional adjustments;
• supervisor corrections;
• repeat testing;
• another site visit; or
• additional technician support.

The training record sees two qualified technicians.

Operational data may reveal something different.

This does not mean organizations should use isolated rework events to label technicians as competent or incompetent. Equipment condition, procedures, parts, tooling, workload and many other variables may contribute.

But patterns matter.

When competency evidence is considered alongside rework and quality data, organizations can begin asking better questions.

Does a particular competency gap repeatedly appear alongside a certain type of rework?

Does targeted development change that pattern?

Do technicians who demonstrate stronger practical assessment results also produce more consistent work?

Those are measurable workforce questions.

5. ONE MAY MAKE BETTER DECISIONS

Some of the most important differences between technicians appear when there is no perfect script to follow.

A procedure can define expected actions.

Training can explain hazards and controls.

But real-world environments create changing conditions.

A technician may encounter an unexpected equipment state, conflicting information, an unfamiliar fault or a condition that does not precisely match the training scenario.

What happens next requires judgement.

Do they recognize the abnormal condition?

Do they stop?

Do they reassess the risk?

Do they know the limits of their own capability?

Do they escalate appropriately?

OSHA requirements for electric power work provide a useful example. Qualified employees must be trained and competent in relevant skills and techniques, with the degree of training determined by the risks associated with the hazard. Review OSHA’s requirements for electric power transmission and distribution work.

Decision-making therefore forms part of practical capability — particularly when work becomes complex or safety-critical.

6. ONE MAY HANDLE MORE COMPLEX TASKS

Job titles can also hide significant variation.

Two people may both be described as “technicians”, but one may confidently perform only a relatively narrow range of tasks while another can work across multiple systems and handle considerably greater complexity.

This creates a major challenge for workforce planning.

If an organization sees only:

Technician = Technician

it may assume those resources are interchangeable.

Operationally, they may not be.

A more useful workforce view might distinguish capability across:

• mechanical systems;
• electrical systems;
• high voltage;
• troubleshooting;
• preventative maintenance;
• controls and digital systems;
• rescue;
• equipment-specific skills;
• leadership and supervision; and
• authorization levels.

This is the principle behind STL USA’s approach to customizable competency frameworks: capability should be mapped against what a role actually requires rather than inferred from a generic job title.

EXPERIENCE MATTERS — BUT EXPERIENCE IS NOT A STANDARDIZED UNIT

Experience is rightly valued in technical work.

But “five years’ experience” can describe very different development journeys.

One technician may have spent five years exposed to:

• multiple turbine platforms;
• complex fault finding;
• major component work;
• electrical diagnostics;
• unusual failure modes;
• different sites and operating environments; and
• experienced mentors.

Another technician may have spent five years repeatedly completing a narrower range of routine tasks.

Both legitimately have five years’ experience.

But their breadth and depth of capability may be very different.

This is why workforce decisions need evidence beyond tenure.

THE ANSWER IS NOT MORE CERTIFICATES

If two certified technicians demonstrate different levels of capability, the solution is not automatically to send one of them for another course.

As we explored in Is Your Safety Problem Really a Training Problem?, training is an intervention — it should not automatically be the diagnosis.

The difference between two technicians could result from:

• a knowledge gap;
• insufficient practical experience;
• limited OJT;
• lack of equipment exposure;
• insufficient mentoring;
• a specific technical skills gap;
• confidence;
• decision-making;
• supervision; or
• the opportunity to perform increasingly complex work.

Different causes require different development responses.

The first step is therefore not necessarily training.

It is understanding the gap.

DEFINE WHAT GOOD LOOKS LIKE

You cannot meaningfully compare capability without a benchmark.

What should a Level 1 technician know and demonstrate?

What should a Level 2 technician be capable of performing independently?

Which tasks should be reserved for Level 3?

What troubleshooting capability is expected at each stage?

Which activities require supervision?

What evidence is required before authorization?

These expectations need to be defined.

As explored in What Good Looks Like – Building a Benchmark for Techs, competency frameworks create measurable expectations against which actual technician performance can be evaluated.

Without that benchmark, “good technician” can become little more than subjective supervisor opinion.

THEN ASSESS WHAT EACH TECHNICIAN CAN ACTUALLY DO

Once the benchmark exists, structured assessment can provide evidence of current capability.

That can include:

• knowledge assessment;
• practical demonstrations;
• scenario-based assessment;
• technical questioning;
• observed task performance;
• troubleshooting exercises;
• equipment-specific assessment; and
• workplace evidence.

OSHA has long recognized the importance of actual skills and knowledge alongside training records. In guidance relating to craft technical skills, OSHA stated that employers are responsible for ensuring employees possess the skills and knowledge necessary to perform their tasks safely, noting that workplace evaluation can involve employee interviews and observation of work procedures. Read OSHA’s interpretation on assessing technical skills.

Likewise, OSHA training guidance in other high-risk contexts includes documented proficiency assessment through written assessment and skills demonstration, illustrating the wider importance of measuring what individuals can demonstrate rather than relying only on attendance. See OSHA’s proficiency assessment guidance.

STL USA’s Assessment Creation and Delivery service applies the same fundamental principle: establish the requirement, measure actual capability and use the evidence to identify genuine development needs.

FROM A LIST OF TECHNICIANS TO A MAP OF CAPABILITY

This changes the way organizations can view their workforce.

A traditional workforce report might show:

On paper, they look interchangeable.

A competency view might reveal:

Now the organization has something much more useful than a training record.

It has workforce intelligence.

WHY THIS MATTERS FOR DEPLOYMENT

Once capability differences become visible, deployment decisions can become more precise.

Instead of asking:

“How many Level 2 technicians do we have available?”

an operations team can ask:

“Which available technicians have demonstrated the capabilities required for this work?”

That distinction can influence crew composition, supervision, project mobilization and development planning.

It can also help organizations avoid overreliance on a small number of highly capable technicians.

If every complex fault is quietly routed to the same three people, that may indicate a critical organizational capability concentration.

Without competency data, that risk may remain hidden until those technicians are unavailable.

This is one of the broader issues explored in Scaling a Workforce Performance System: expanding organizations need repeatable competency standards and evidence of readiness rather than relying solely on local knowledge about who is “good” at particular work.

CAPABILITY DATA CAN ALSO MAKE DEVELOPMENT FAIRER

There is an important technician benefit too.

When progression depends heavily on tenure, job title or subjective manager opinion, highly capable technicians may not always receive recognition for what they can actually do.

A measurable competency framework creates clearer evidence.

A technician can see:

• what is expected at their current level;
• what they have already demonstrated;
• where gaps remain;
• what capability is required at the next level;
• what development will help them progress; and
• what evidence will demonstrate readiness.

This transforms development from an unclear process into a visible pathway.

And instead of training being allocated generically, it can be targeted at actual requirements — an approach explored further in Training Based on Real Gaps and Requirements.

CONNECT COMPETENCY WITH PERFORMANCE

Assessment becomes even more valuable when it is not viewed in isolation.

Imagine an organization begins tracking:

• competency assessment results;
• first-time fix;
• rework;
• repeat faults;
• mean time to repair;
• quality observations;
• supervision requirements;
• safety observations; and
• technician progression.

It can then start looking for patterns.

Do technicians who demonstrate stronger troubleshooting capability resolve faults faster?

Do stronger practical assessment results correlate with less rework?

Which capabilities appear most important for independent working?

Where are competency gaps affecting deployment?

Does targeted development improve subsequent operational performance?

These relationships need to be investigated carefully — correlation should not automatically be treated as causation.

But without capability data, organizations cannot even begin asking those questions with evidence.

This is the central argument behind COULD WORKFORCE CAPABILITY BE AFFECTING YOUR OPERATIONAL PERFORMANCE?: workforce capability is one operational variable organizations should be able to measure, understand and improve.

FROM TRAINING MANAGEMENT TO WORKFORCE PERFORMANCE

This is where the wider workforce model changes.

Traditional training management asks:

Who has completed what?

A workforce performance approach asks:

What can each technician demonstrably do, what do they need next and are they ready for the work we need them to perform?

That requires organizations to connect:

Benchmark → Assess → Identify Gaps → Develop → Reassess → Validate → Authorize → Deploy → Monitor

STL USA brings these elements together through Total Tech Training powered by STL Loop, combining competency frameworks, structured assessments, targeted development, training records, technician pathways and workforce readiness data.

As explored in Business Impacts of a Workforce Performance System, the objective is to connect workforce development more closely with outcomes that matter to the business — including safety, readiness and operational uptime.

SAME CERTIFICATIONS. DIFFERENT DEVELOPMENT NEEDS.

The important point is not that one technician is “good” and another is “bad”.

That kind of binary thinking is exactly what competency frameworks should help organizations move beyond.

Both technicians may be valuable members of the workforce.

Both may be correctly trained and certified.

But they may have different strengths, different gaps and different levels of readiness for particular work.

Once those differences become visible, organizations can respond intelligently.

One technician may need additional electrical troubleshooting development.

Another may need more supervised experience.

Another may be ready for more complex work.

Another may be capable of mentoring junior technicians.

Another may be ready to progress to the next technician level.

The objective is not to make every technician identical.

It is to understand the capability that exists across the workforce and develop each technician against clear operational requirements.

STOP ASSUMING. START MEASURING.

If two technicians have the same certifications, the same job title and similar experience, it is tempting to treat them as equivalent resources.

But a certificate tells you something important about what a technician has completed.

A competency assessment tells you something different:

What can they demonstrate?

That evidence creates better decisions about development.

Better decisions about supervision.

Better decisions about progression.

Better decisions about authorization.

And better decisions about deployment.

As organizations continue asking COULD WORKFORCE CAPABILITY BE AFFECTING YOUR OPERATIONAL PERFORMANCE?, understanding the differences between individual technicians is an essential part of finding the answer.

Same certifications do not necessarily mean the same capability.

Measure what your technicians can actually do.

Discover how STL USA’s Assessment Creation and Delivery service can help you benchmark technician capability, identify genuine competency gaps and build evidence-based development pathways.

FREQUENTLY ASKED QUESTIONS

Can two technicians with the same certifications have different competency levels?

Yes. Certifications provide important evidence that defined training or assessment requirements have been achieved, but technicians can subsequently develop different levels of practical capability depending on experience, frequency of task execution, equipment exposure, OJT, mentoring, supervision and other factors.

Why can technicians with similar experience perform differently?

Length of experience does not necessarily reflect breadth or depth of experience. Two technicians may each have four years in role while having been exposed to very different equipment, faults, tasks and levels of complexity. Demonstrated competency provides additional evidence beyond time served.

What is demonstrated competency?

Demonstrated competency is evidence that a technician can apply relevant knowledge, skills and behaviors to perform a defined task or activity to an expected standard. Evidence can include practical assessment, observation, technical questioning, scenario-based exercises and appropriate workplace performance evidence.

How can employers compare technician capability fairly?

Organizations first need clearly defined competency benchmarks for each role or technician level. Structured assessments can then evaluate technicians against the same criteria, creating more consistent evidence than relying solely on informal supervisor opinion.

Does a more experienced technician always have greater capability?

No. Experience is important, but its value depends on the type, breadth, frequency and complexity of work performed. Practical assessment helps establish what an individual can currently demonstrate rather than assuming capability from years of service alone.

How does technician capability affect troubleshooting?

Troubleshooting combines technical knowledge, equipment understanding, analytical reasoning, practical experience and judgement. Stronger troubleshooting capability can help technicians identify root causes and select appropriate corrective actions more efficiently, although equipment, information, tooling and other operational factors also influence outcomes.

How can competency data help reduce rework?

Competency data can help organizations investigate whether recurring quality or rework patterns coincide with particular capability gaps. Where a genuine gap is identified, targeted training, coaching, OJT or another development intervention can then be applied and reassessed.

How should technician competency influence deployment?

Deployment decisions can consider demonstrated task- and equipment-specific capability alongside certifications, authorization, experience and site requirements. This provides a more complete view of whether a technician is ready for particular work.

Can competency assessment replace GWO training or certification?

No. Competency assessment complements recognized training and certification rather than replacing them. GWO and other standardized programs establish important common foundations, while additional role- and task-specific competency evidence can help employers understand how those foundations translate into their own operational environments.

Why should organizations measure workforce capability?

Capability data can improve visibility of workforce strengths, gaps, development requirements and readiness. As explored in COULD WORKFORCE CAPABILITY BE AFFECTING YOUR OPERATIONAL PERFORMANCE?, it can also allow organizations to investigate relationships between workforce competency and operational measures such as quality, troubleshooting, rework, first-time fix, reliability, deployment and safety.