Ergonomics

Ergonomics is a scientific discipline focused on how humans interact with various elements within a system.

It is also frequently called human factors or human factors engineering (HFE). This field applies complex theories and data to the process of design. The primary goal is to optimize both human well-being and overall system performance. By studying these interactions, professionals aim to reduce human error and increase productivity. They also work to enhance the safety, health, and comfort of the people using a system.

To achieve these goals, ergonomists follow a specific process to ensure a proper "fit" between the user and their environment. This concept is often described as "fitting the task to the man." Specialists begin by assessing the specific job or activity being performed. They then evaluate the demands placed upon the human user during that task. Next, they examine the equipment, specifically its size, shape, and appropriateness for the job. Finally, they analyze how information is presented to and modified by the user. This holistic approach ensures that tools and processes match human capabilities and limitations.

The field is divided into three main domains of specialization. The first is physical ergonomics, which focuses on human anatomy and biomechanics. This includes studying working postures, repetitive movements, and how people handle materials.

The second domain is cognitive ergonomics, which deals with mental processes. This involves studying perception, memory, reasoning, and motor responses. It also addresses mental workload, decision-making, and human-computer interaction. The third domain is organizational ergonomics. This area optimizes sociotechnical systems, including organizational structures, policies, and communication processes.

There is also a specialized area called environmental ergonomics. This field examines how humans interact with elements like climate, temperature, pressure, light, and vibration. Another emerging area is human factors in highway safety. This research studies how road users, such as drivers and pedestrians, process information. In the United States, driver error is a contributing factor in 44% of fatal collisions. By understanding these human actions, engineers can design safer roads and streets to reduce accidents.

The history of the term ergonomics is rooted in the Greek words "ergon," meaning work, and "nomos," meaning natural law. The word first appeared in modern literature in 1857. A Polish scientist named Wojciech Jastrzębowski used it in an article about the science of work. In 1858, a French scholar named Jean-Gustave Courcelle-Seneuil used the term as well. The word later entered the English language through the work of Hywel Murrell. Murrell was a British psychologist who used the term during a 1949 meeting at the UK's Admiralty. This meeting eventually led to the foundation of The Ergonomics Society.

Ergonomics is vital for preventing serious health issues like work-related musculoskeletal disorders (WRMDs). These are injuries that cause persistent pain and loss of physical function. In the United States, approximately 1.8 million workers experience WRMDs every year. Nearly 600,000 of these injuries are severe enough to cause workers to miss time from their jobs. Common risk factors include repetitive motions, forceful exertions, and awkward working positions. Using ergonomic solutions, such as sit-stand stations or specialized computer accessories, can help mitigate these risks.

Today, ergonomics connects many different scientific fields together. It draws on knowledge from psychology, sociology, and engineering. It also uses data from disciplines like anthropometry, which is the study of human body measurements. Other contributing fields include biomechanics, kinesiology, and industrial design. Even modern technology is being integrated into the field. For example, collaborative robots can now use biomechanical models of human co-workers. These robots can adjust their configuration to account for human muscle fatigue or posture. This ensures that the shared workspace remains safe and efficient for the human worker.