In simple terms
A friendly intro before the formal notes — no formulas yet.
From Problem to Prototype: Your Design Journey
The design project is a structured process that guides you from identifying a real-world problem to creating a functional solution. It's a journey of discovery, creativity, and practical making, documented in a formal report.
Think of it like planning and hosting a surprise birthday party. First, you 'investigate' the birthday person's interests, who to invite, and potential venues (the problem and user). Then, you 'develop' ideas for the theme, decorations, and cake, and create a detailed plan (ideation and specification). Finally, you 'realise' the party by setting everything up, hosting the event, and seeing if everyone had a good time (prototyping and testing).
- 1
Identify a genuine problem experienced by a specific user or client, and formalise this in a design brief.
- 2
Conduct thorough primary and secondary research to understand the context, user needs, and existing solutions, leading to a detailed design specification.
- 3
Generate a range of distinct, creative ideas. Select and develop the most promising concept through modelling, feedback, and refinement.
- 4
Plan the construction, build a working prototype, and rigorously test it against your design specification to evaluate its success.
Full topic notes
Formal explanation with the rigour you need for the exam.
Phase 1: Investigate (Criterion A)
This is the foundation of your entire project. The goal is to deeply understand a problem, the context in which it exists, and the needs of the people affected. A strong investigation leads to a clear and focused project. You must identify a real client or target user and work with them to define the problem, culminating in a concise Design Brief.
Identify a suitable problem and a real, accessible client/target user.
Conduct primary research (interviews, surveys, observation) and secondary research (market analysis, ergonomic data, material properties).
Analyse existing products to understand their strengths and weaknesses.
Synthesise your findings into a formal Design Brief that frames the project.
This phase demonstrates your ability to analyse a problem and justify the need for a solution.
Phase 2: Develop (Criterion B)
With a solid understanding of the problem, you now transition to creating a solution. This phase is about creativity, critical thinking, and refinement. You will start by creating a detailed Design Specification based on your research. Then, you'll generate a range of different ideas, select the most promising one, and develop it into a final, detailed proposal ready for manufacturing.
Create a detailed Design Specification with quantifiable points justified by your research (e.g., 'The product must weigh less than 200g to be easily handled by a child').
Generate at least three conceptually different ideas using techniques like brainstorming and sketching.
Evaluate your ideas against the specification and select the best concept, justifying your choice.
Develop the chosen idea through iterative modelling (physical or CAD), user feedback, and testing.
Produce a final set of detailed drawings (e.g., orthographic projections) and plans for manufacture.
Your IA report is a narrative. Ensure there is a clear, logical link between your research (Investigate), your specification and ideas (Develop), and your final prototype (Realise). An examiner should be able to follow your design journey without any logical gaps. Use your Design Specification as the central thread connecting all phases.
Phase 3: Realise (Criteria C & D)
This is where your design comes to life. The 'Realise' phase involves two main parts: constructing the prototype (Criterion C) and testing/evaluating it (Criterion D). You will follow your production plan to build a high-quality prototype. Afterwards, you will conduct rigorous tests to see how well it performs against the Design Specification you created in the 'Develop' phase.
Criterion C (Creating the Solution): Construct a production plan that outlines all steps, tools, and materials. Follow this plan to manufacture your prototype, documenting the process with photographs. Demonstrate skill and safety in your work.
Criterion D (Testing & Evaluation): Develop a clear testing methodology. Conduct tests to gather quantitative (e.g., time to complete a task) and qualitative (e.g., user feedback on comfort) data.
Critically evaluate the success of your prototype against each point in your Design Specification.
Suggest specific, evidence-based improvements for future development.
Reflect on how your solution impacts the client and the wider community.
Worked examples
See the formulas applied — reveal one step at a time, like the exam.
A student notices their younger sibling, who is left-handed, struggles to use standard classroom scissors safely and effectively. Write a concise Design Brief for a project to address this.
- 1
A well-structured Design Brief should include:
For the left-handed scissors project, write one quantifiable specification point related to ergonomics, justifying it with research.
- 1
A strong specification point is specific, measurable, and justified:
How it all connects
The big idea sits in the middle — tap a linked idea to explore the link.
Tap a linked idea to see how it connects back to the main topic — that connection is what examiners reward.
Glossary
Key terms for this topic — skim now; the Check step will test them.
- Design Brief
A formal starting point for a design project. It outlines the problem, the context, the target user/client, and any major constraints. It should be concise and open-ended, not prescribing a solution.
- Design Specification
A list of measurable criteria that the final design must meet. Each point should be justified by research. It is used to guide development and evaluate the final prototype.
- Primary Research
Gathering new, first-hand data directly from the source. Examples include user interviews, surveys, observation, and physical testing.
- Secondary Research
Analysing existing data that has been collected by someone else. Examples include academic papers, books, manufacturer's data sheets, and online articles.
- Ergonomics
The study of how people interact with products, systems, and environments. It focuses on efficiency, comfort, and safety.
- Anthropometrics
The study of the measurements and proportions of the human body. This data is crucial for ensuring a product 'fits' its target user (e.g., grip size, reach distance).
- Usability Testing
A method of evaluating a product by testing it with representative users. The goal is to identify any usability problems and collect qualitative and quantitative data on user satisfaction.
- Client vs. User
The 'client' is the person who commissions the project (e.g., a parent). The 'user' is the person who will interact with the final product (e.g., their child). They are not always the same person.
- Iterative Design
A design methodology based on a cyclic process of prototyping, testing, analysing, and refining a product or process. It's a key part of the 'Develop' phase.
- Feasibility Study
An assessment of the practicality of a proposed project or system. In the IA, this involves considering your skills, available time, resources, and budget to select a viable concept.
- Orthographic Drawing
A series of 2D views of an object (typically front, top, and side) used in production plans to communicate precise dimensions and features for manufacturing.
Name it
Read the meaning, then pick which of this lesson’s terms it describes. Miss one and you see what your choice really means.
A design methodology based on a cyclic process of prototyping, testing, analysing, and refining a product or process. It's a key part of the 'Develop' phase.
Quick check
Write your answer first, then compare it with the model one — the gap is what you would have lost.
Teach it back
If you can explain it simply, you own it — gaps here are marks you’d lose.
Teach it back
Explain this topic as if teaching a friend. We name the gaps an examiner would still dock.
Revision flashcards
Guess first, then flip — retrieval beats re-reading.
Key takeaways
Review these before you close the topic — retrieval beats re-reading.
Identify a suitable problem and a real, accessible client/target user.
Conduct primary research (interviews, surveys, observation) and secondary research (market analysis, ergonomic data, material properties).
Analyse existing products to understand their strengths and weaknesses.
Synthesise your findings into a formal Design Brief that frames the project.
This phase demonstrates your ability to analyse a problem and justify the need for a solution.
Practice — then mark it
The whole point: a real Cambridge question, marked mark-by-mark.
Test Your Understanding
Test Your Understanding
Extra simulations & links
PhET, GeoGebra and other curated tools — open in a new tab.
Frequently asked
Checkpoint
One marked question is worth ten re-reads — close the loop before you move on.
Reading it isn’t knowing it — prove it.
Before you move on: do Test Your Understanding on paper, snap a photo, and get examiner-style feedback on exactly where you win and lose marks.
Discuss The design project — investigate, develop, realise
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