Human Error Reduction Training: When Knowing Isn’t Enough

Nobody goes to work planning to get hurt. Yet workplace accidents remain a major challenge across Europe. Eurostat recorded around 2.82 million non-fatal accidents at work in the EU in 2023 that resulted in at least four days of absence, as well as 3,298 fatal accidents.

This is despite decades of progress in workplace safety. Organisations have better equipment, stronger regulations, risk assessments, procedures, PPE and extensive safety training. So why do experienced, trained people still make errors that can lead to injuries?

Human error reduction training approaches this question from a different angle. Rather than focusing only on hazards, rules and procedures, it considers the human factors that can influence performance in the moment. This is where SafeStart differs from conventional safety training. It helps people recognise when their physical or mental state is increasing the likelihood of an unintentional error, then gives them practical skills to reduce that risk.

What is human error in workplace safety?

It is generally accepted within safety that human factors are involved in a large proportion of workplace incidents, with figures of 80% to 90% commonly cited. However, the exact percentage varies considerably depending on how human error and incident causation are defined. The percentage is less important than the underlying point: people make mistakes, including experienced and well-trained people.

Human error does not automatically mean negligence or a lack of competence. Safety professionals commonly distinguish between slips, lapses, mistakes and violations. A slip occurs when someone intends to do the right thing but performs an action incorrectly. A lapse involves forgetting something, while a mistake occurs when the action follows the plan but the plan itself is wrong. A violation is different because it involves an intentional deviation from a rule or procedure.

These distinctions matter because simply telling people to "be more careful" does little to prevent the same thing from happening again.

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Why incident investigations need to go deeper

Larry Wilson explores this idea in Human Error is Not a Cause, It's a Consequence. He argues that "human error" should not be the end of an investigation. Instead, it should lead to another question: what made that error more likely?

His password example makes the point simply. Most of us have entered a password incorrectly even though we know it perfectly well. When we're rushing, tired, frustrated or distracted, mistakes become easier to make. Teaching us the password again would achieve little because knowledge was never the problem.

HSE takes a similar deeper approach through performance influencing factors, including fatigue, workload, time pressure, distraction, communication, procedures and the working environment. Looking at these factors moves incident investigation beyond blame and towards prevention.

How human factors explain workplace incidents

Human factors considers how people interact with their tasks, equipment, environment and colleagues. It recognises that human performance varies, which means the likelihood of error can vary too.

In Paradigm Shifts #1: Hazards or Human Error?, Larry Wilson challenges the idea that controlling hazards tells the whole safety story. Guards, PPE, procedures and engineering controls remain essential, but people can still make errors that bring them into contact with hazards or hazardous energy.

Why rushing, frustration, fatigue and complacency matter

SafeStart focuses on four states that can increase the likelihood of an error: rushing, frustration, fatigue and complacency.

Rushing can lead to missed steps or divided attention, while frustration can make it harder to stay focused on the task. Fatigue can affect attention and judgement, and complacency can develop as a task becomes so familiar that it requires less conscious thought.

These states are normal human experiences. The important point is what can happen next. When someone is rushing, frustrated, fatigued or complacent, they may be more likely to make one or more of the critical errors...

The four critical errors

SafeStart focuses on four critical errors:

• ‍eyes not on task, 👀
• mind not on task, 💭
• moving into or being in the line of fire, ⚠️
• and losing balance, traction or grip. 🦶

The connection between states and errors is important. Someone rushing through a warehouse may stop looking carefully where they are going, which could put them in the path of a moving vehicle. A fatigued worker may lose focus during a familiar task, while someone working in a state of complacency may have their mind elsewhere and fail to notice a change in conditions.

This is the practical idea behind SafeStart's state-to-error pattern. By learning to recognise a state before it contributes to a critical error, people have an opportunity to refocus and reduce their exposure to risk.

Compliance vs human error reduction training

Human error reduction training should never be treated as a substitute for good safety management. Engineering controls, procedures, risk assessments, PPE, supervision and compliance training all play essential roles in protecting workers. SafeStart is designed to complement these systems rather than replace them.

Compliance training establishes what safe work requires. Human error reduction training adds practical skills that can help people follow through when factors such as fatigue, rushing or complacency affect their performance.

This becomes particularly relevant with experienced employees. They may already know the procedure and understand the hazard. The challenge is not always a lack of knowledge. Sometimes it is maintaining the right level of attention when a task has become extremely familiar.

SafeStart therefore focuses less on teaching people another set of rules and more on helping them recognise when their own state is increasing their risk.

What lasting behavioural change requires

One-off awareness training is unlikely to create lasting change. New safety habits require practice and reinforcement until safer responses become easier to use and automatic responses in everyday situations.

SafeStart's work on the neuroscience behind its Critical Error Reduction Techniques highlights repetition as an important part of developing subconscious safety responses.  This means continuing to reinforce the concepts through everyday conversations and practice rather than treating training as a completed event.

How SafeStart helps prevent unintentional errors

SafeStart focuses on what happens before an unintentional error occurs. Employees learn to recognise states such as rushing, frustration, fatigue and complacency, then use practical Critical Error Reduction Techniques to prevent those states from leading to critical errors. Through repetition, these techniques become stronger habits and help train the subconscious mind. The goal is to build faster, more automatic safety responses, so people can react almost instantly when risk increases.

Take fatigue while driving. A tired driver may yawn or notice their concentration slipping. With practice, that feeling of fatigue can become a trigger to refocus. The more this response is practised, the stronger and faster it becomes, helping the brain move from consciously thinking about the technique to responding almost automatically. This is why repetition is such an important part of SafeStart training.

What results can organisations realistically expect?

Results will vary depending on factors such as leadership support, employee participation, existing safety performance and how consistently the concepts are reinforced. Organisations using SafeStart have reported significant reductions in injuries, alongside improvements in safety awareness and engagement. See our case studies for examples.

Building safer habits around human error

Human error is not simply another name for carelessness, and it should not be the final answer when something goes wrong. The more useful question is what influenced the error and what could make it less likely next time.

Human error reduction training helps people recognise those influences and develop practical ways to respond. SafeStart builds these skills around predictable states and critical errors, helping people develop safer habits while strengthening the safety systems already around them.

Explore SafeStart's human factors safety training programmes to help reduce unintentional errors and build a stronger safety culture.

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