Human factors engineering, UX, and ergonomics: one big tent

What do HFE, UX, and ergonomics have in common?

Human factors engineering (HFE), user experience (UX), and ergonomics start with people: what they need, what they can do, what gets in their way, and how a design affects them. Practitioners observe real use, talk with people, test ideas, and revise designs. They may use the same interview, prototype, or usability test while asking different follow-up questions. Human factors and ergonomics name the same broad discipline in much of the research literature. HFE emphasizes its engineering application, while UX often pays close attention to experience across a product or service. These emphases can work together on the same project. [1] [2] [5] [6]

Our terminology workshop asked practitioners to organize terms, methods, and work products across HFE and adjacent disciplines. A later affinity mapping report grouped 265 contributions from 24 participants. The findings are preliminary and help describe shared practice; they do not set fixed boundaries for the professions. [3] [4]

What does human factors engineering cover?

HFE examines what people can perceive, understand, reach, remember, and do while using a system. A practitioner might study a driver using a dashboard, a clinician responding to an alarm, or a team coordinating around a new tool. The analysis can include the interface, the task, the physical setting, training, procedures, and the organization. The goal is to improve how those parts fit together so people can work safely and effectively. [1] [2]

A confusing clinical alert may look like a screen problem, but its effect also depends on workload, timing, procedures, and team coordination. Wilson describes HFE as a systems discipline. The SEIPS model links people, tasks, tools, environment, and organization in patient safety work. [2] [7]

Are human factors and ergonomics the same thing?

Yes, in much of the scholarly literature. Dul and colleagues treat “ergonomics” and “human factors” as synonymous. The field covers physical concerns such as posture and reach, cognitive concerns such as attention and decisions, and organizational concerns such as teamwork and schedules. A chair is one possible subject; a control room, hospital workflow, or software tool can be another. “Physical ergonomics” and “cognitive ergonomics” describe areas within the broader field. [1] [2]

What is UX, and how does it overlap with HFE?

UX studies a person’s experience of a product, system, or service in context. It includes what people do, think, and feel across use. In a survey of 275 researchers and practitioners, Law and colleagues found broad agreement that UX is subjective, dynamic, and dependent on context. UX research can cover software, services, and physical products. [5]

A UX researcher and an HFE practitioner might run the same usability test and reach the same finding. Together, they could ask how an interaction feels, how well a task goes, and how safety, physical demands, procedures, and the surrounding work system shape the result. Sauer and colleagues analyzed usability, UX, and accessibility as related concepts within ergonomics. These are shared design problems; no single job title owns a method or outcome. [2] [6]

One product, complementary questions

Imagine a car maker replacing dashboard buttons with a touch screen. This is an illustration, not a finding from a test of a particular vehicle.

A team could ask how long a driver looks away from the road to change a setting, what the driver must remember, and how the control behaves during a demanding drive. They could also examine reach, hand position, feedback, labels, and how frustrating the task feels. HFE, physical ergonomics, and UX each make these questions easier to see. A team can combine their methods and test the design with the people who will use the vehicle.

For a conversation about this example, listen to E258, “Touch screens are killing your driving experience.” The episode offers perspectives and questions to examine. The research references below support the definitions on this page.

Why do the labels overlap?

Job postings, academic programs, and project briefs use the same terms with different scopes. Our workshop and preliminary affinity map help people see shared practice and discuss where emphases differ. A title alone tells you little. Ask who uses the system, what task they need to complete, what could go wrong, which parts of the setting can change, and what evidence would show improvement. [3] [4]

Is UX part of human factors?

UX can sit within a larger HFE effort, and UX teams can lead their own work on products and services. The useful question is which perspectives and methods a project needs. Their histories, methods, and problems overlap. [1] [2] [5] [6]

Does ergonomics include software?

Yes. Ergonomics examines cognitive and organizational interactions as well as physical fit. Interface design, alerts, and workflows can be ergonomics questions when studied in the context of people and systems. [1] [2] [7]

How should a team choose an approach?

Define the people, tasks, setting, risks, and desired outcomes first. Then bring together UX, HFE, and ergonomics perspectives that can test those questions. A usability test may help; a safety-critical workflow may also need task, workload, and system analysis. The big tent works best when people share evidence and address the whole problem. [1] [2] [6] [7]