IA Day 12 —
Finalize Criterion C
Return to the three strong redesign ideas and make the final Criterion C decision using specifications, testing, intended-user feedback and the evidence added through materials and sustainable-systems learning.
By the end of class, you should be able to…
Close Criterion C
Make the three ideas readable, feasible and complete.
Evaluate—not vote
Use specifications, testing and intended-user feedback.
Make the final selection
Reconsider the earlier front-runner and show why the chosen idea is now the strongest evidence-based option.
Prepare Criterion D
Identify what must now be modelled, tested and refined.
User + task + evidence.
Problem + specifications.
Three strong ideas + evaluation.
Model · test · refine.
Show the intended redesign.
“Idea 2 looks best.”
A preference without a traceable reason.
“Idea 2 best satisfies S1, S3 and S5…”
“…and intended-user testing showed fewer task errors than Ideas 1 and 3.”
| Requirement | Idea 1 evidence | Idea 2 evidence | Idea 3 evidence | Judgement |
|---|---|---|---|---|
| Essential S1 | Test / feedback | Test / feedback | Test / feedback | Which performs best—and why? |
| Essential S2 | Evidence | Evidence | Evidence | Do not invent numerical scores without a basis. |
| Desirable S3 | Evidence | Evidence | Evidence | Use priority appropriately. |
Make the selected direction interpretable by someone else.
Criterion C requires annotated presentation evidence showing the feasible ideas tested against the specifications and user feedback. Use the medium that communicates the decision clearly.
The mini-lesson is short. The evidence-making is the lesson.
Check feasibility, key features and concise evidence-linked annotations.
Use testing and intended-user feedback against the design specifications.
Write a short, defensible judgement—not a preference statement.
List the features/specifications that must be modelled and tested next.
Meaningfully distinct, feasible and connected to the problem statement.
Evidence exists for comparison—not imagined reactions.
Choice is justified against specifications and user needs.
You know what the next fidelity model must test.
Before you leave…
IA Day 13 — Criterion D Launch: Fidelity Model & Test Plan
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.