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Medical Device Development Insights: Human Factors Engineering vs Design Thinking
Medical Device Development Insights: Human Factors Engineering vs Design Thinking
4 Mar 20265 min read
This article is part of ATL’s Medical Device Development Insights series, which explores the engineering processes used to bring safe, effective medical devices from concept to market. The series examines how engineering teams identify clinical problems, translate user needs into technical requirements, and develop devices that meet both regulatory expectations and real-world clinical demands.
Overview
In medical device development, Human Factors and Usability Engineering (HFUE) plays a critical role in ensuring products are safe, effective, and designed to minimize user error. When a single mistake can have life-changing consequences, prioritizing usability is essential.
However, as the global medical device market becomes increasingly competitive, safety alone is no longer a differentiator. To succeed, manufacturers must move beyond regulatory compliance and adopt a more innovative, user-centered approach to product development.
By prioritizing the user’s lived experience early in the design phase, teams can uncover latent needs that a traditional risk mitigation approach may overlook. The result is products that are not only safe but also intuitive, ergonomic, and efficient to use.
This article explores how Design Thinking and HFUE complement each other, combining creative problem exploration with structured usability validation to support more effective medical device development.
The Common Ground: Empathy
Although Human Factors / Usability Engineering (HFUE) and Design Thinking originate from different disciplines—one grounded in cognitive science and regulatory frameworks, the other in creative problem-solving—they share a foundational principle: empathy for the user.
Both approaches reject the idea of designing for a generic “average user.” Instead, they emphasize developing a deep understanding of the people who interact with the device and the environments in which it will be used.
In HFUE, empathy is formalized through techniques such as:
- Task analysis
- Ethnographic observation
- Workflow evaluation
These methods help engineers understand the physical, cognitive, and environmental limitations users may experience.
Similarly, Design Thinking begins with an empathize phase, in which interviews, observations, and immersion techniques are used to uncover user needs, frustrations, and behavioral patterns.
Ultimately, both disciplines aim to bridge the gap between technical functionality and human behavior, ensuring that devices support safe and efficient user interaction.
Shared Principles
Both HFUE and Design Thinking:
- Reject assumptions by observing real users in real environments
- Encourage iterative development through feedback and design refinement
- Promote friction-free interactions between users and devices
What Is Design Thinking?
Design Thinking is a human-centered methodology for problem-solving that encourages teams to begin by understanding user needs before developing solutions.
By gathering insights directly from users early in the development process, teams can focus on solving genuine problems rather than relying on assumed requirements.
Figure 1. The Design Thinking process illustrating the phases of empathize, define, ideate, prototype, and test.
The Design Thinking framework typically includes five phases:
- Empathize
- Define
- Ideate
- Prototype
- Test
These stages encourage iterative development and frequent evaluation of design concepts.
Example of the Design Thinking Loop at ATL
- Empathize
Shadowing and interviewing surgeons or patients to identify workflow challenges and pain points. - Define
Narrowing the problem from a broad statement such as “surgeons experience fatigue when using the device” to a more specific insight such as “the device weight distribution prevents comfortable single-handed operation.” - Ideate
Multidisciplinary teams—including clinicians, engineers, and human factors specialists—generate potential solutions. - Prototype
Low-fidelity models are created quickly, often using 3D printing or simple physical models, to explore ergonomics and usability. - Test
Users interact with prototypes in simulated environments to identify improvements.
What Is Human Factors and Usability Engineering (HFUE)?
Human Factors and Usability Engineering (HFUE) is a structured engineering process defined by IEC 62366-1, focused on improving patient safety by minimizing use-related risks.
HFUE applies knowledge of human capabilities, limitations, and behaviors to the design of medical devices. The process requires manufacturers to identify potential use errors—such as misinterpreting a display or incorrectly assembling a component—and mitigate those risks through design improvements and usability testing.
The ultimate goal of HFUE is to provide objective evidence that a device’s user interface can be used safely and effectively by the intended users within the intended environment.
Figure 2: ATL engineers performing usability testing to evaluate device interaction and clinical workflow.
Core Components of IEC 62366-1
Key elements of HFUE include:
Use Specification
Defining the intended users, use environments (such as a home setting or emergency department), and the device’s intended use.
Formative Evaluation
Early-stage usability testing is conducted during development to identify design improvements and reduce potential use errors.
Summative Evaluation
The final validation study is conducted under realistic use conditions to demonstrate that the device can be used safely and effectively.
User Interface Design
Designing all elements of the device that users interact with, including:
- Physical controls
- Software interfaces
- Displays
- Labeling and packaging
ATL supports both formative and summative usability studies, using in-house facilities that allow teams to simulate realistic use environments across a wide range of medical devices, including RF generators, endoscopic systems, and other clinical technologies.
Conclusion: Integrating Creativity and Safety
Design Thinking and HFUE are most effective when used together throughout the medical device development lifecycle.
Design Thinking encourages teams to explore unmet needs and identify opportunities for innovation, ensuring that new technologies address real clinical challenges.
HFUE provides the structured evaluation required to verify that those innovations can be used safely and effectively.
Together, these approaches support the development of devices that:
- Address real clinical needs
- Reduce use-related risk
- Provide intuitive user interaction
- Meet regulatory expectations
By integrating both frameworks early in the design process, teams can ensure that innovation and safety evolve together, resulting in medical devices that deliver meaningful value to clinicians and patients.
Next in the Series
In the next article in the Medical Device Development Insights series, we explore Design Thinking in greater depth and how it helps engineering teams uncover unmet clinical needs during the earliest stages of device development.
The article dives deeper into how multidisciplinary teams use observation, user interviews, and rapid prototyping to translate clinical challenges into innovative product concepts.