Investigate a need and write a testable specification
Use observation, interviews, product analysis and data to define a design opportunity and measurable requirements.
Section Component 2 · Project · school-based
Exam scope and assessment notes
StudyForA provides original teaching and scenario-based practice, not Cambridge past papers, official marks or an authenticated practical course. It cannot assess a candidate's actual workshop skills, finished product or Component 2 portfolio. Component 2 is school-based, internally assessed and externally moderated; the teacher authenticates candidate work. Any real making requires centre facilities, risk controls and direct qualified supervision. Candidate project work must remain their own. Follow the syllabus for the exam year.
Before you begin
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which is a testable specification point?
What you will learn
- Identify a need or opportunity from observation, interviews, product analysis or data.
- Research constraints, organise and interpret evidence, then justify a design brief and specification.
Separate evidence, inference and assumptions
A design problem can begin with an observed difficulty, a user request, product analysis or relevant data. Keep notes about who provided information, when it was collected and what remains uncertain. Ask permission before recording or quoting people.
A brief states the problem and intended user without prescribing one finished design. A specification turns evidence into criteria. Make criteria testable when possible: dimensions, load, cost, opening force, stability, cleaning, safety or expected service life. A measurable target should come from research, not an invented number.
Use research to define constraints
Constraints can come from available materials, workshop access, cost, skills, time, laws, environmental conditions or external requirements. Present relevant results with a labelled table, graph, diagram or short summary.
A useful specification explains why a criterion matters and how it will be evaluated. Separate essential needs from preferences and note who can validate each criterion. If evidence conflicts, record the conflict and investigate before choosing a direction.
Sources for this lesson
Pause and explain
What is the main difference between a design brief and a specification?
Worked example
Several pupils say a shared classroom marker tray is hard to find and markers roll off the desk. How can this observation become a useful brief and specification?
Show the worked solution
- Observe the tray use and ask pupils or staff what fails; record the context and sample limits.
- Check the desk space, marker sizes, cleaning needs and material availability.
- Write a brief about organising markers at the shared work area.
- Set testable criteria such as capacity, footprint, retrieval time and resistance to rolling, then define tests.
Answer A reasonable brief is to design a compact organiser for a shared classroom desk. Criteria could require space for the measured set of markers, fit within the available desk area, prevent rolling during normal desk use and allow quick retrieval. Measure the actual items and test a prototype; do not guess dimensions.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A learner says a bicycle light is 'not bright enough'. What three pieces of research could make that statement more useful?
Give me a hint
Investigate when, where and for whom the light is inadequate.
Compare my reasoning
- Ask the rider when and where the problem occurs.
- Observe mounting, angle and competing light conditions where safe.
- Check relevant regulations and compare measurable visibility criteria.
Record the rider's route and conditions, observe whether mounting or angle contributes, and check current local requirements for bicycle lighting. A safe visibility test or specification can then be chosen; do not ride in traffic to test an unverified prototype.
Look for these in your work
- Collects user evidence
- Checks context
- Identifies a safe validation method
Write a brief and three specification criteria for a holder that keeps reusable cups upright in a school cafeteria.
Give me a hint
State the user and problem in the brief; make each criterion checkable.
Compare my reasoning
- Name the setting and user need without prescribing a shape.
- Identify measurable capacity, footprint or cleaning needs.
- State how each criterion could be tested.
Example brief: design a holder that helps cafeteria users transport reusable cups without tipping. Criteria might specify the measured number and sizes of cups, fit within a measured tray area, and clean without trapping liquid. Test a prototype with representative cups and a controlled movement task.
Look for these in your work
- States a need rather than a fixed solution
- Uses evidence-dependent criteria
- Provides test ideas
A client asks for a 'cheap, sustainable' display stand. What evidence would you gather before deciding whether a proposal meets that request?
Give me a hint
Unpack both broad words into local measures and compare options over time.
Compare my reasoning
- Ask what price limit and use-life the client expects.
- Research sourcing, manufacture, maintenance, reuse and disposal for candidate materials.
- Define criteria for cost, durability, repair and end-of-life.
Ask for a budget and expected service life, identify production quantity and setting, and compare materials using evidence about sourcing, manufacture, repair and disposal. A low purchase price alone does not prove low life-cycle cost or environmental impact.
Look for these in your work
- Clarifies ambiguous terms
- Uses comparative evidence
- Avoids unsupported sustainability claims
Common mistakes
- Writing the brief as a proposed product rather than a need
- Treating a single interview as proof of every user's preference
- Setting measurable targets without collecting the measurements that justify them
What can you explain now?
What is the main difference between a design brief and a specification?
Compare with the explanation
The brief states the problem; the specification lists criteria a solution should meet.
The specification makes the brief testable and helps compare proposals.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Recall the main decision in “Investigate a need and write a testable specification”, name the evidence that supports it, and identify one limitation that still needs checking.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.