IA Day 13 —
Criterion D Launch
Plan the physical fidelity model and the multiple model–test–refine cycles that will turn your selected idea into the intended solution.
By the end of class, you should be able to…
Read Criterion D
Know what “develop a fidelity model” requires.
Plan increasing-fidelity models
Choose each model’s fidelity based on the next design question.
Plan multiple cycles
Make testing and refinement visible over time.
Connect every test
Tie testing to specifications and intended-user needs.
A physical fidelity model is required—but Criterion D is an iterative modelling process.
Use physical, graphical and digital models as appropriate. Across Criterion D, show multiple model–test–refine cycles with models of varying but increasing fidelity as the solution develops.
Geometry
Foam/card/3D print can test size, reach, clearance or fit.
Interaction
A working mock-up can reveal grip, movement, confusion or errors.
Structure / performance
A physical model or suitable simulation can test load/deflection/strength assumptions.
Appearance / communication
CAD or higher-fidelity surfaces can support form, proportion and visual feedback.
| Specification | Design uncertainty | Model / test | Data to collect | User involved? | Decision rule |
|---|---|---|---|---|---|
| S1 | What might fail? | How will you test? | Measure / observe | Who? | What result triggers refinement? |
| S2 | What is unknown? | Appropriate fidelity | Evidence | How? | Pass / revise logic |
The mini-lesson is short. The evidence-making is the lesson.
Bring Criterion C into a clear starting point for D.
Map major specifications to a model/test and evidence type.
Materials, scale, functional features, tools, safety and user access.
Build only as much fidelity as needed to answer the first questions.
A physical model is included, and later versions can increase fidelity as evidence demands.
There is room for evidence-based change.
Every test has a reason.
You know what data / feedback to capture.
Do not outsource manufacture for the design project.
Before you leave…
IA Day 14 — Fidelity Model Build & Test: Cycle 1
Keep the evidence chain moving: user → research → decision → test.
Organize today’s evidence while it is fresh. Make sure each design decision can be traced to research, testing or intended-user evidence.