Iterative Design Process
Using repeated cycles of exploration, creation and evaluation to make evidence-led design decisions rather than following a rigid sequence.
How to prepare for the GCSE Design and Technology written exam
Move from requirement to evidence, technical principle, comparison and justified decision. Use current board materials separately for the NEA and for full timed-paper rehearsal.
Core concepts
Concept 1
Iterative design revisits research, ideas, models, testing and criteria as evidence changes understanding of the problem and solution.
Exam cue: State the uncertainty, select evidence that could resolve it, then describe the resulting decision.
Concept 2
A model or trial is useful when it answers a defined question about form, function, user interaction, manufacture or performance.
Exam cue: Connect each test result to one criterion and one justified next step.
Concept 3
Refinement should respond to evidence and may involve trade-offs; change alone is not proof of improvement.
Exam cue: Explain what was learned at a stage, not simply that the stage happened.
Risk pitfalls and guardrails
Presenting iteration as a fixed circular diagram with no evidence-driven return.
Guardrail: Do not substitute one board's specialist route or current product claim for the multi-board core, and do not turn written process knowledge into NEA or practical submission material.
Treating every visual variation as meaningful development.
Guardrail: Do not substitute one board's specialist route or current product claim for the multi-board core, and do not turn written process knowledge into NEA or practical submission material.
Claiming an outcome improved without a criterion or comparison.
Guardrail: Do not substitute one board's specialist route or current product claim for the multi-board core, and do not turn written process knowledge into NEA or practical submission material.
Memory anchors
Iteration
Repeating and revisiting design activity in response to new evidence.
Prototype evidence
Information gained from representing or testing an idea.
Refinement
A justified change intended to improve performance against criteria.
Trade-off
A decision in which gaining one benefit involves accepting a cost elsewhere.
Design decision
A reasoned choice between alternatives using evidence and constraints.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What makes a design process iterative?
A card model shows that a control is hard to reach. What is the best next step?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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