Prototypes gather feedback by allowing users and clients to interact with, inspect, or evaluate a proposed design before final production. Designers collect the resulting evidence and use it to refine the design against the product specification.
In B2.2 Modelling and prototyping, a prototype is a physical or digital representation used to test aspects of a design. Its fidelity should match the purpose of the test: a low-fidelity prototype may test layout or form, while a high-fidelity prototype may test function, materials, ergonomics, or usability.
The designer first identifies what must be tested and selects representative participants. Participants then complete realistic tasks or assess specific features under controlled conditions. Feedback is recorded as quantitative data, such as task completion time or rating scores, and qualitative data, such as comments, observed difficulties, and preferences.
| Feedback source or method | Evidence gathered | How it informs development |
|---|---|---|
| Users performing tasks | Errors, completion time, comfort, accessibility, and ease of use | Reveals usability and ergonomic problems |
| Client evaluation | Judgments about requirements, cost, brand identity, and intended purpose | Confirms whether the proposal meets the design brief |
| Observation | User behaviour, hesitation, misuse, and workarounds | Identifies problems users may not report themselves |
| Interviews or focus groups | Detailed explanations, opinions, and suggestions | Explains why particular features succeed or fail |
| Questionnaires | Ratings and responses from a larger sample | Makes patterns easier to compare and quantify |
The designer analyzes this evidence, identifies weaknesses, modifies the design, and tests another prototype. This forms an iterative design process: prototype, test, evaluate, refine, and retest.
A common misconception is that simply showing someone a prototype automatically produces useful feedback. Effective testing requires clear criteria, representative participants, unbiased questions, and systematic recording of results.
In an IB examination response, distinguish the user from the client, identify a suitable testing method, and explain how the evidence leads to a specific design modification. Avoid merely stating that feedback “improves the product”; show what is measured and how the design changes.