An intro to human factors engineering. A lecture I gave at mHealth Israel. It was followed by a lecture about FDA usability requirements by Becky Margolies Moses.

1. HFE for Medical Devices
mHealth Israel
Yakir Yaniv
June 18, 2018

2. USER INTERFACE
› GUI definition
› Usability of products
and machinery
› Interface design
RESEARCH & TESTING
› Users research
› Usability testing
› Prototyping
ERGONOMICS
› Ergonomic analysis
› Ergonomic solutions
design
› Production flow
optimization
ED&U Studio
HF Engineering Solutions

3. s
ED&U Studio

4. HF Engineering
Human Factors Engineering (HFE) is the discipline of
applying what is known about human capabilities &
limitations to the design of products, processes, systems,
and work environments.
It is distinctive in being the only discipline that relates
humans to technology.
HFE objectives are to improve EOU, safety and productivity

5. Design
Engineering Human
Factors

6. Human
Factors
• Ease of use
• UX / UI
• Ergonomics
• Error prevention
• Mental models
• Operational concept

7. User
Function
Environment

8. Usability
Usability is the extent to which a product can be used by
specified users to achieve specified goals with effectiveness,
efficiency, and satisfaction in a specified context of use.
Usability is a qualitative attribute that assesses how easy user
interfaces are to use.

10. Usability Factors
• Learnability
• Efficiency of use
• Memorability
• Errors
• Subjective satisfaction
•‫ע‬‫ק‬‫ו‬‫מ‬‫ת‬‫ל‬‫מ‬‫י‬‫ד‬‫ה‬
•‫י‬‫ע‬‫י‬‫ל‬‫ו‬‫ת‬
•‫ז‬‫כ‬‫י‬‫ר‬‫ו‬‫ת‬
•‫ט‬‫ע‬‫ו‬‫י‬‫ו‬‫ת‬
•‫ש‬‫ב‬‫י‬‫ע‬‫ו‬‫ת‬‫ר‬‫צ‬‫ו‬‫ן‬

11. Usability engineering
process

14. HFE Process
User Research
Concept Design
Design Feedback
Interface definition
Design
Usability Testing
Population definition, interviews, user expectations
Task analysis, flow description, interaction
definition, ergonomic requirements
Detailed screens and controls
Graphic design, industrial design,
mechanical design
Hi & lo fidelity prototypes, simulations,
Alpha products
Usability Testing
Usability Testing

15. User story

16. Concept design

17. • Users (patients & therapists) need research
• Solution definition
• Medical cases research
• App definition, design and development
Sensor
Set up
(Password protected)
Each line can be expanded by
clicking “+” to expose more data
(detailed in next slide)
1. Sensor data update.
2. Data shall be updated by a
technician
3. Requires password to protect
unintended changes
4. Relevant data is always presented
Sensor name – as given by
technician
1. Sensor real time status.
2. Options:
- Connected (green) – sensor
connected and moving
- Sandby (orange) – sensor
connected and not moving
- Blank – sensor not
connected
1. Real time battery status as
reported by Gemsense application
2. Icon color:
- >15% - green
- <15% - red
1. Sensor location presented on a
crutches schem
2. The crutches schem is a static
figure
3. Labels location are static. One at
the bottom and one near the
handle
4. The names will be presented
according to the actual location of
the physical sensors
RL
UX Design

18. Error
prevention
Mental
model

19. Error
prevention

20. Error
prevention

21. Error
prevention

22. The effect of HFE on a PRODUCT
• Ease of use
• Safe working environment
• Error prevention
• Shortening training time
• Reduction of service costs
• Satisfied users

23. “ If the user can’t use it, it doesn’t work”
Susan Dray
Dray & Associates, Inc

24. Good design is
all about people
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