How do human-factors engineers identify mismatches between people and machines?

Human-factors engineering, which encompasses related fields like bioengineering, identifies mismatches between people and machines by replacing intuition and guesswork with rigorous scientific methods.1

Rather than relying on common sense, engineers utilize techniques derived from the behavioral sciences to analyze how humans interact with machine systems. Because new technologies are often developed faster than data on human response can be accumulated, these specialists frequently employ empirical, trial-and-error approaches to test designs.1

The identification process is grounded in the human-machine model, which views the human as an integral system element. Engineers evaluate how an operator:
* Senses machine displays (e.g., dials, lights, or sounds).2
* Processes information by interpreting signals, making decisions, and utilizing higher mental functions.2
* Acts upon controls (e.g., levers, pedals, or switches) to influence the machine.2

By observing these cycles within specific environments—accounting for factors like temperature, noise, and vibration—engineers can pinpoint where human capabilities or limitations are not being met and develop workable solutions.12