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Usability Testing and the System Usability Scale Effectiveness Assessment on Different Sensing Devices of Prototype
Josip Lorincz1,2, Katarina Barišić3, Vjeran Vlahović3
1Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture (FESB), University of Split, Ruđera Boškovića 32, 21000 Split, Croatia.
Sensors (Basel, Switzerland)
|January 28, 2026
Summary
Prototype testing effectively identifies usability issues early in development. System Usability Scale (SUS) assessments on prototypes reliably predict the final digital system
Area of Science:
- Human-Computer Interaction
- Software Engineering
- Usability Engineering
Background:
- Differences in user experience (UX) can emerge between digital system prototypes and live implementations due to factors like prototype fidelity and tool limitations.
- Assessing how well UX testing methods, such as usability testing and the System Usability Scale (SUS), reflect the UX of both prototypes and live systems is a critical research gap.
Purpose of the Study:
- To compare usability testing and SUS results between a Figma web prototype and its live counterpart for a telecom service extension process.
- To evaluate the effectiveness of prototype testing in identifying usability issues and the predictive capability of SUS for live system UX.
Main Methods:
- Conducted usability testing and SUS assessments with 10 participants across a Figma prototype and a live web system.
- Utilized various mobile sensing devices, including different types of mobile phones, for testing.
- Analyzed usability testing results based on the frequency and severity of reported issues.
Main Results:
- Prototype testing proved highly effective in detecting a wide range of usability issues early in the development phase.
- A significant overlap in perceived usability issues was observed between the prototype and live system across different mobile devices.
- The SUS evaluation on the prototype provided a reliable early indication of the perceived usability of the live digital system.
Conclusions:
- Early-stage prototype testing is crucial for identifying and rectifying usability problems before live deployment.
- The System Usability Scale (SUS) can serve as a valuable predictive tool for assessing the UX of a final digital product during the prototyping phase.
- Findings offer guidance for designers and developers to enhance the overall user experience of digital products from prototype to live implementation.
Keywords:
Figmaaccessibilitydevelopmenthuman–computer interactionlive webmobile deviceprototypesensingsystem usability scaletestinguser experience (UX)More Related Videos
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