SMARTCLOTH Prototype Enhances Diabetes Dietary Management Through Iterative User-Centred Design

Why It Matters

Designing health care hardware requires a deep understanding of user needs and contexts to ensure adoption and efficacy. By employing iterative user-centered design processes, developers can create solutions that are not only functional but also intuitive and supportive of patient adherence to treatment plans.

Key Finding

A structured, user-focused design process, involving multiple stages of research and iterative prototyping, was effective in developing and refining a health care hardware prototype for diabetes management.

Key Findings

• Systematic application of the Double Diamond model facilitated iterative refinement of the SMARTCLOTH prototype.
• User feedback from interviews, focus groups, and usability sessions was crucial in identifying design requirements and usability issues.
• The iterative prototyping and testing process led to 15 internal versions and 3 user-tested prototypes.

Research Evidence

Aim: To demonstrate a replicable human-centered design methodology for health care hardware development, using a smart tablecloth prototype for diabetes dietary management as a case study.

Method: Design Thinking (Double Diamond model)

Procedure: The process involved pre-assessment to define scope, user needs characterization through interviews and persona/empathy/journey mapping, focus groups to identify barriers and desired functionalities, iterative prototyping (low- to high-fidelity wireframes and interactive web prototypes), and usability testing with think-aloud protocols, video analysis, and structured tasks.

Sample Size: 22 participants (7 patients, 6 healthcare professionals, 5 focus groups with patients and educators)

Context: Healthcare hardware development for chronic disease management (Diabetes Mellitus)

Design Principle

User needs and feedback must be central to the iterative development of health care technology.

How to Apply

When designing any health-related device or system, begin with in-depth user research, create personas and journey maps, develop prototypes, and conduct iterative usability testing with target users.

Limitations

The study focused on a specific prototype (SMARTCLOTH) and patient group; generalizability to all health care hardware may require further validation. The number of participants in usability testing was relatively small.

Student Guide (IB Design Technology)

Simple Explanation: To make health gadgets work well for people, you need to ask them what they need and test your ideas with them over and over again.

Why This Matters: This research shows that designing for users from the start is key to creating successful health technology that people will actually use and benefit from.

Critical Thinking: How might the specific cultural or socioeconomic backgrounds of the participants have influenced their needs and the design of the SMARTCLOTH prototype?

IA-Ready Paragraph: The development of the SMARTCLOTH prototype highlights the critical role of human-centered design in health care hardware. By employing a systematic approach, including in-depth user research, persona development, and iterative prototyping and testing, the project successfully addressed user needs and improved usability, demonstrating a robust methodology applicable to other health technology design projects.

Project Tips

• Clearly define your target user group early in your design project.
• Use a variety of research methods to gather diverse user insights.
• Document your iterative design process thoroughly, showing how user feedback influenced changes.

How to Use in IA

• Reference this study when discussing your user research methods, iterative design process, or the importance of user feedback in your design project.

Examiner Tips

• Demonstrate a clear understanding of user needs and how they informed design decisions.
• Show evidence of iterative design and testing, with clear links between user feedback and design changes.

Independent Variable: User-centered design methodology (stages of research, prototyping, testing)

Dependent Variable: Usability of the SMARTCLOTH prototype, adherence to dietary recommendations, user satisfaction

Controlled Variables: Diabetes mellitus patient profile, specific dietary management goals, technological literacy of participants

Strengths

• Systematic application of a recognized design methodology (Double Diamond).
• Inclusion of multiple research methods (interviews, focus groups, usability testing).
• Iterative development process with user feedback incorporated.

Critical Questions

• What are the long-term implications of using such technology for patient self-management?
• How can the cost-effectiveness of developing and implementing such hardware be assessed?

Extended Essay Application

• Explore the application of user-centered design principles to a different health-related product or service, documenting the research and iterative development process.

Source

SMARTCLOTH Prototype for Dietary Management in Patients With Diabetes Mellitus: Tutorial on Human-Centered Design Methodology for Health Care Hardware Development · Journal of Medical Internet Research · 2026 · 10.2196/75744