By the end of this topic, you should be able to...
construct a plan for a UCD process based on research questions that engage with user-centred research methods.
Guiding Question
How does understanding user needs directly impact the design of products and services?
What is User-Centred Design?
User-Centred Design is a design philosophy and iterative process framework in which the needs, wants, limitations, and contexts of end users are given priority at every stage of the design process. As the IBO Design Technology Guide (First Assessment 2025) establishes, UCD places the human experience at the core of design decision-making, requiring designers to continuously engage with real users rather than designing on assumption.
The foundation of UCD is simple but demanding:
You are not the user. Design decisions must be driven by evidence gathered directly from the people who will use the product.
The UCD Process — A Structured Framework
A well-constructed UCD process plan moves through five interconnected phases, each driven by research questions:
Phase 1: Empathize
Research Question Focus: Who are the users and what is their lived experience?
Method | Purpose |
Ethnographic observation | Understand users in their real context |
User interviews | Capture personal narratives and pain points |
Diary studies | Record user behaviour over time |
Contextual inquiry | Observe users while they perform tasks |
Real-World Example: When OXO International developed the Good Grips kitchen tool range, designer Sam Farber observed his wife Betsy — who had arthritis — struggling with conventional peelers. Rather than assuming her needs, OXO conducted extensive observational research with users who had reduced hand mobility. The resulting soft, oversized, non-slip handle was not a stylistic choice — it was a direct research output. Crucially, the design worked equally well for all users, demonstrating UCD's broader value.
Phase 2: Define
Research Question Focus: What is the precise problem the user needs solved?
This phase synthesises research into a clearly articulated design problem from the user's perspective. The IBO Design Technology Guide (First Assessment 2025) emphasises that a well-defined problem statement is the critical bridge between research and design action.
Tools at this stage include:
User personas — fictional but evidence-based user profiles
Journey mapping — visualising the user's experience over time
Problem statements — "How might we..." framing
Real-World Example: Airbnb famously used UCD define-phase methods to rescue their failing platform in 2009. After conducting user interviews and journey mapping, founders discovered their core problem was not the concept — it was that poor-quality photography made listings unappealing. The defined problem: users could not emotionally connect with spaces through existing visuals. This led directly to professional photography services for hosts — a solution that transformed the business.
Phase 3: Ideate
Research Question Focus: What range of solutions might address the defined user problem?
Ideation in UCD is always anchored to user evidence gathered in earlier phases.
Methods include:
Brainstorming and mind mapping
SCAMPER technique
Worst possible idea (reverse brainstorming)
Co-design sessions with users
Real-World Example: IDEO's redesign of the hospital patient experience for Kaiser Permanente involved clinical staff, patients, and designers in co-ideation sessions. Ideas were generated with users, not for them — producing innovations like improved nurse shift-handover procedures that directly reduced patient anxiety.
Phase 4: Prototype
Research Question Focus: How can ideas be made tangible enough for users to respond to?
UCD prototyping ranges from low-fidelity paper models to high-fidelity functional prototypes. The key principle is that prototypes exist to be tested by users, not to be perfect. As Houde and Hill (1997) identify, prototypes answer specific design questions — they are tools of inquiry, not endpoints.
Real-World Example: Apple famously built hundreds of physical foam and cardboard models when developing the original iPhone (2007). These low-fidelity prototypes allowed the team to test hand ergonomics and screen proportion with real users long before any software was written.
Phase 5: Test
Research Question Focus: Does this solution genuinely address the user's needs?
Testing in UCD is not the end of the process — it feeds directly back into earlier phases. Methods include:
Usability testing (observed task completion)
Think-aloud protocols
A/B testing
Post-use interviews
Real-World Example: Dyson conducted over 5,000 prototype iterations of the original bagless vacuum cleaner, with user testing at multiple stages informing each development cycle. This iterative, user-validated approach is a textbook UCD process in action.
Constructing a UCD Process Plan — The Key Components
For the learning objective to be met, a constructed UCD plan must include:
Research Questions — The Engine of UCD
The quality of a UCD process is determined by the quality of its research questions. Effective UCD research questions are:
User-focused — centred on human experience, not product features
Open-ended — allowing for unexpected discovery
Contextual — acknowledging the environment of use
Non-leading — avoiding assumptions embedded in the question
Example Research Questions by Phase
Phase | Example Research Question |
Empathise | How does a visually impaired commuter currently navigate public transport systems? |
Define | What are the most significant pain points experienced during the boarding process? |
Ideate | What existing solutions partially address this need and where do they fall short? |
Prototype | Does the user understand how to activate this feature without instruction? |
Test | Has the redesigned interface reduced the time taken to complete the task? |
Key Takeaway
UCD is not a single method — it is a structured commitment to keeping the user central throughout the entire design process.
The IBO Design Technology Guide (First Assessment 2025) frames UCD as a cyclical, evidence-driven process. The ability to construct a UCD plan means demonstrating that every design decision traces back to a research question, a research method, and real user data. Without this traceability, design becomes guesswork.
Three non-negotiables of a valid UCD plan:
✅ Research questions that are genuinely user-centred
✅ Methods that are appropriate to the questions asked
✅ Iteration points where user feedback re-enters the process
Practical Application
Where B1.1 UCD Appears in Your IA
IA Section | UCD Application |
Criterion A — Identifying the Design Opportunity | Your UCD research plan justifies why the design problem is real and user-validated |
Criterion A — Research | Primary UCD methods (interviews, observation) generate your user evidence base |
Criterion B — Design Development | User personas and journey maps from your UCD process inform and justify design decisions |
Criterion D — Evaluation | User testing closes the UCD loop — evaluating against the original user needs |
What Examiners Are Looking For
Evidence that real users were engaged — not assumed needs
A logical sequence of research methods that answers defined research questions
Iteration — proof that user feedback changed the design direction
A clear link between research findings and design decisions
Build your UCD plan before you begin designing. Write your research questions first, select your methods second, conduct your research third — and only then begin generating design ideas. Your design decisions should be surprising to you based on what users actually tell you. If your research confirms exactly what you assumed, you probably haven't listened hard enough.
Practical action: For each design decision in your IA, write one sentence that begins: "User research revealed that..." — if you cannot complete that sentence with real evidence, the decision is not UCD-compliant.
💡Study Tip
The most common IA mistake in UCD is conducting research after design decisions have already been made — then retrofitting the evidence to justify those decisions. Examiners can identify this immediately.
Sources
International Baccalaureate Organization. Design Technology Guide. International Baccalaureate Organization, 2023. First Assessment 2025.
Brown, Tim. Change by Design: How Design Thinking Transforms Organizations and Inspires Innovation. HarperBusiness, 2009.
Cross, Nigel. Design Thinking: Understanding How Designers Think and Work. Berg Publishers, 2011.
Houde, Stephanie, and Charles Hill. "What Do Prototypes Prototype?" Handbook of Human-Computer Interaction, edited by M. Helander, T. K. Landauer, and P. Prabhu, 2nd ed., Elsevier Science, 1997, pp. 367–381.
IDEO. The Field Guide to Human-Centered Design. IDEO.org, 2015.
Kumar, Vijay. 101 Design Methods: A Structured Approach for Driving Innovation in Your Organization. John Wiley and Sons, 2013.
Martin, Bella, and Bruce Hanington. Universal Methods of Design: 100 Ways to Research Complex Problems, Develop Innovative Ideas, and Design Effective Solutions. Rockport Publishers, 2012.
Norman, Donald A. The Design of Everyday Things. Rev. ed., Basic Books, 2013.
Linking Questions
To what extent does UCD rely on a strong foundation of ergonomics? (A1.1)
How important is a good understanding of user-centred research methods to ensure effective UCD? (A2.1)
To what extent can the UCD process be influenced by the quality of modelling and prototyping of potential design solutions? (B2.2)
To what extent should a UCD process focus on ensuring inclusive design? (C1.2)
What influence can product analysis and evaluation have on the effectiveness of UCD? (C3.1).