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High-rise building construction is one of the riskiest places for a person to work.  A team of scientists in Taiwan, known for some of the highest buildings in the world, set out to find out the major causes for accidents in high-rise building construction.

Using an assessment technique called The Construction Safety Equilibrium Model, they looked at both task demand and capability of the workers.  

Construction Safety Equilibrium Model


In Task Demand, they looked at the work conditions.  Were their skills up to the task? Were there high winds, lack of visibility, or soil instability?  How difficult was the task at hand?

In Capability, they examined work experience, level of training, the worker’s physical condition, and human factors including rushing through the job.  Finally, were the workers distracted?  Were they tired and unable to focus?  Was their attention diverted? 

What the study found was that human behavior was a problem more of the time in causing accidents than any other issue involved.

The highest risks affecting workers were frustration and lack of awareness.  These workers were distracted by worrying about their own problems, and they were also not aware of the risks involved in the task.  That lack of risk perception can be caused by poor training, or it can be a sign of fatigue, where a person’s perception of risk starts to fade as the fatigued brain starts to shut down. 

Human behavior, not weather, not equipment, is the major cause of most accidents. 

Construction Site Safety

 Alertness Prevents Accidents

People need to be adequately trained, and people need to be ALERT.

How do you know if someone is alert?  By testing for it.  “Impairment testing”, or cognitive alertness testing, is simple to use and helps employees be more aware of distraction and fatigue. By taking a quick graphics test at the beginning of every shift, your employees can confirm their fit-for-work status.  They can see a real-time assessment of their own alertness level, compared to their regular alertness baseline. This helps them manage fatigue before it overtakes them, create awareness of distractions, or lets a supervisor know if someone needs to be reassigned to a less risky job for the day. 

Impairment takes many forms – someone could be coming down with a cold, or having trouble sleeping, or might have just received some bad news.  The reasons are endless, but the solution is specific.  Testing for cognitive performance reveals so much more than what you can measure in blood, urine, or eye movements. 


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