Is Human Factors Engineering Just Common Sense?

While some aspects of HFE may seem intuitive, such as designing products that are comfortable to use or labelling controls in a clear and understandable way, other aspects of the field might seem counter-intuitive from a common sense point of view.

For example, it might seem like common sense to make displays, such as computer screens or dashboards, with high contrast to make them easier to read. However, HFE research has shown that high-contrast displays can cause glare and eye strain, especially in low-light conditions. Instead, HFE practitioners may use low-contrast designs that reduce eye fatigue and improve readability.

Also, it might seem like a good idea to provide a lot of feedback, such as noise or vibration, when a driver applies the brakes in a car. However, HFE research has shown that too much feedback can be distracting and reduce driver attention. Instead, HFE practitioners may design brakes with less feedback that are still effective at stopping the vehicle.

The use of automation in certain situations can go against common sense if it’s not designed with human factors in mind. On the surface, it might seem that “designing out the human” is a good strategy. However, the belief that humans are the source of error and that the solution is to minimise their involvement in complex systems can be misleading.

Research has shown that full automation can reduce situation awareness and lead to complacency, particularly if people are not properly trained on how to intervene when necessary. In some cases, partial automation, which involves a combination of human and machine control, can be more effective than full automation. Partial automation can help maintain situational awareness and provide opportunities for human intervention and decision-making.

For example, in aviation, a partially automated cockpit that involves a human pilot working with an automated system has been found to improve safety and performance compared to fully automated systems. The pilot can provide situational awareness and decision-making capabilities that are difficult to replicate with an automated system alone.