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e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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> **DRAFT** — under teacher review.
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# Activity — Design a Hot Cross Bun Matrix
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The Hamilton and Alexandra College · Year 12 · 2026
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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The fastest way to learn how to *design* an evaluation matrix — and then decide **which elements of the winning design need to be developed further** — is to build one for something real and edible. CHOICE rates hot cross buns with the same discipline it rates headphones; in this activity, so will you. By the end you'll have designed, run, defended a matrix *and* produced a "further develop" list — the exact deliverable for **C4-2** and **Unit 4 Outcome 1**.
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[CHOICE's actual hot cross buns review-and-compare](https://www.choice.com.au/food-and-drink/bread-cereal-and-grains/bread/review-and-compare/hot-cross-buns) is the reference matrix you're learning from.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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{{Video|src=https://www.youtube.com/watch?v=k7m04xW0fzk}}
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**🎯 Watch first:** notice the panel scores against *agreed criteria*. Your job today is to decide those criteria — and defend them.
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---
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## The challenge
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acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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We're comparing two real CHOICE-reviewed buns — **Woolworths Bakery Chocolate** vs **Coles Finest Luxurious Fruit**. Working as a review panel, you will:
9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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1. Design an evaluation matrix.
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2. Use it to crown a winner.
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3. **Decide which elements of the winning bun design need to be developed further** — including elements your matrix did *not* score.
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That third step is the headline skill for [C4-2](/sd/C04/C4-2%20Checkpoint%20-%20Evaluation%20Matrix). It's the harder one — and the one most students skip.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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---
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acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 1 — Pick a persona, then design the matrix *before you taste*
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We're not starting from scratch. CHOICE ran an actual review in March 2025 — a blind taste test of 19 supermarket and bakery buns. Two of their top picks are on the bench:
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| Product | CHOICE Rating | Type | Toasted | Fresh | Buns/pack | Price/bun |
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|---|---|---|---|---|---|---|
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| **Woolworths Bakery Chocolate** (Cadbury chips) | 95 | Chocolate | 97% | 93% | 6 | $0.73 |
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| **Coles Finest Luxurious Fruit** | 85 | Traditional | 83% | 87% | 4 | $1.38 |
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*Source: [CHOICE Hot Cross Buns review and compare](https://www.choice.com.au/food-and-drink/bread-cereal-and-grains/bread/review-and-compare/hot-cross-buns), last updated 20 March 2025.*
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Before you taste anything, notice what's already obvious: **these aren't the same product**. One is chocolate, one is traditional fruit. One is **$0.73 per bun**, the other **$1.38** — nearly double. CHOICE's Expert Rating crowns Woolies Chocolate (95) over Coles Fruit (85). But that ranking came out of *CHOICE's* matrix for *CHOICE's* view of "best hot cross bun" — and your persona is not CHOICE.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Criteria come **first**, never invented afterwards to crown the bun you happened to like. Working from the [seven design decisions](/sd/C04/Designing%20an%20Evaluation%20Matrix), agree on:
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- **Who you're recommending for** — the persona drives everything. *"Best bun for a family's traditional Easter breakfast"* and *"best bun for the kids' lunchbox snack"* will not pick the same winner.
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- **Your criteria** — the handful that decide it for that person. Watch out: some criteria (like *"traditional fruit & spice flavour"*) really only apply to one of these two buns. Decide upfront whether you score that as 0–1 for the chocolate bun, or exclude it because your persona doesn't demand it.
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- **How each is measured** — blind panel rating for the eating qualities. The CHOICE data above is legitimate input for *value*, *price*, and a *sanity check* on toasted/fresh.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- **Weights, justified** — where your point of view lives.
9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- **A scale** (use 0–5).
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- **What you deliberately exclude, and why** — *flag these now; they come back in Step 4.*
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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558fe9 lisa 2026-06-02 07:04:11
SD C04 Hot Cross Bun activity: anchor Step 1 worked-example matrix to CHOICE methodology Each criterion now shows the CHOICE element it sits under (Flavour 50%, Appearance 20%, Aroma 15%, Texture 15%, Price per bun). New CHOICE methodology callout shows the source weights students are remixing. 'Three moves vs CHOICE' explainer makes the design decisions explicit: split Flavour into Flavour + Traditional, add Value, drop the Fresh score (persona toasts). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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**CHOICE's own scoring methodology** (so you can see what you're remixing):
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> *Toasted* score = **Flavour 50%** · **Appearance 20%** · **Aroma 15%** · **Texture 15%**
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> *Fresh* (untoasted) score = same four weights, scored untoasted
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> *Price per bun* = pack price ÷ buns per pack
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> *Source: [CHOICE Hot Cross Buns review and compare](https://www.choice.com.au/food-and-drink/bread-cereal-and-grains/bread/review-and-compare/hot-cross-buns).*
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CHOICE's matrix serves "the general hot-cross-bun shopper". *Your* persona is more specific — so you don't have to use those weights, and you can split, drop or add criteria where the persona demands.
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acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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A worked design for the persona *"a family buying for traditional Easter breakfast"*:
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558fe9 lisa 2026-06-02 07:04:11
SD C04 Hot Cross Bun activity: anchor Step 1 worked-example matrix to CHOICE methodology Each criterion now shows the CHOICE element it sits under (Flavour 50%, Appearance 20%, Aroma 15%, Texture 15%, Price per bun). New CHOICE methodology callout shows the source weights students are remixing. 'Three moves vs CHOICE' explainer makes the design decisions explicit: split Flavour into Flavour + Traditional, add Value, drop the Fresh score (persona toasts). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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| Your criterion | Weight | Sits under (CHOICE element) | Method (0–5) |
acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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|---|---|---|---|
558fe9 lisa 2026-06-02 07:04:11
SD C04 Hot Cross Bun activity: anchor Step 1 worked-example matrix to CHOICE methodology Each criterion now shows the CHOICE element it sits under (Flavour 50%, Appearance 20%, Aroma 15%, Texture 15%, Price per bun). New CHOICE methodology callout shows the source weights students are remixing. 'Three moves vs CHOICE' explainer makes the design decisions explicit: split Flavour into Flavour + Traditional, add Value, drop the Fresh score (persona toasts). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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| Flavour (toasted) | 30% | *Flavour* — CHOICE weights 50% of toasted score | Blind panel rating |
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| Traditional fruit & spice profile | 20% | Your sub-judgement of *Flavour* — chocolate bun caps near 1, that's the persona showing | Blind panel rating |
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| Texture (toasted) | 15% | *Texture* — CHOICE 15% | Blind panel rating |
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| Aroma (toasted) | 10% | *Aroma* — CHOICE 15% | Blind panel rating |
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| Appearance | 10% | *Appearance* — CHOICE 20% | Rating |
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| Value | 15% | *Price per bun* — Woolies $0.73 ≈ 5/5; Coles $1.38 ≈ 2/5 | Price → 0–5 |
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Total weight: 100%. Notice three moves compared with CHOICE's matrix:
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1. **Reweighted and split *Flavour*.** CHOICE rolls all flavour into one element at 50% of the toasted score. We split it into *Flavour* (30%) and a dedicated *Traditional fruit & spice profile* (20%) sub-judgement — because the persona cares specifically about traditional flavour, not just "tastes good".
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2. **Added *Value*.** CHOICE reports price per bun but doesn't fold it into the Expert Rating. For a family buying for breakfast, $0.73 vs $1.38 matters.
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3. **Dropped CHOICE's *Fresh* score.** This persona toasts the buns — fresh appeal isn't the deciding factor here.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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*Deliberately excluded:* packaging — it doesn't change how the bun eats, so it can't help one bun beat the other on this matrix. (Hold on to this — Step 4 picks it back up.)
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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558fe9 lisa 2026-06-02 07:04:11
SD C04 Hot Cross Bun activity: anchor Step 1 worked-example matrix to CHOICE methodology Each criterion now shows the CHOICE element it sits under (Flavour 50%, Appearance 20%, Aroma 15%, Texture 15%, Price per bun). New CHOICE methodology callout shows the source weights students are remixing. 'Three moves vs CHOICE' explainer makes the design decisions explicit: split Flavour into Flavour + Traditional, add Value, drop the Fresh score (persona toasts). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Look at what the persona just did. Weighting *traditional flavour* at 20% — *and* dropping CHOICE's fresh score, *and* pulling value into the rating — compresses CHOICE's 10-point lead (95 vs 85) into a contest the panel's own scores will decide. **Different persona, different shape of decision — same data.**
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 2 — Taste blind, score independently
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Two habits that are real evaluation skills, not just fairness:
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- **Blind it.** Label the brands A, B, C with the names hidden. If you can see the brand, the brand scores it for you.
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- **Score alone first, then compare.** If everyone just agrees with whoever speaks loudest, you've measured confidence, not buns.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Apply your weights to each brand's scores to get a **weighted total**.
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 3 — Crown the winner
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- **Explain** which bun proceeds, citing at least two criteria and their scores.
9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- **Justify** by **naming the rival**: what does your winner give up compared with the runner-up, and why is that trade-off worth it for your persona?
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 4 — Decide what to develop further
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You now know *which* bun wins. The harder question — **the C4-2 deliverable** — is: *which elements of that winning design need detailed design work next?*
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The matrix on its own doesn't answer that. Look in **two** places:
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**(a) Where your winner scored weakest.** If your winner beats the rivals overall but only got a 3 on *texture*, that is a development priority. The detailed-design task isn't "is the texture good enough?" — it's "*how* will we improve texture in the next version?"
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**(b) Requirements the matrix didn't score.** This is the bit students miss. The matrix scores criteria *the persona uses to choose between options* — taste, value, freshness. But your project has requirements that don't decide *one bun over another*, and so don't earn a matrix row, yet absolutely affect the final product. **Packaging** is the classic case:
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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> The requirement *"attract more customers to consider buying it"* is real — but packaging doesn't change how the bun eats, so it stays out of the matrix. It still has to be designed properly. It belongs on your "develop further" list anyway.
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A quick test for any candidate element:
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> *"If two designs tied on this, would it show up in the matrix?"* If **no**, but it still has to be **designed properly**, it goes on your develop-further list.
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**Now produce three things to develop further** — at least one from **(a)**, at least one from **(b)**.
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> [!NOTE]
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> In C4-2 this is the headline output. The matrix names the winning *idea*; the deliverable is which **elements** of that idea become detailed designs. Packaging-not-in-matrix is your worked example of source (b).
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Your scoring sheet
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acd0d1 lisa 2026-06-02 07:00:31
SD C04 Hot Cross Bun activity: anchor Step 1 to two real CHOICE-reviewed buns Replace the abstract 'two or three brands' framing in Step 1 with a real comparison: Woolworths Bakery Chocolate (CHOICE Expert 95) vs Coles Finest Luxurious Fruit (Expert 85), using CHOICE's March 2025 review data. Pedagogy: CHOICE's 95-vs-85 ranking is presented as one valid result from *one* matrix. A 'traditional Easter breakfast' persona pulls Coles into direct contention, demonstrating that 'different persona, different shape of decision — same data'. New 'Notes' column on the worked-example matrix shows where to use CHOICE data as input vs sanity check. Scoring sheet updated to the two named brands instead of A/B/C. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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| Criterion (weight) | Method | Woolworths Bakery Chocolate | Coles Finest Luxurious Fruit |
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|---|---|---|---|
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| | | | |
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| **Weighted total / 5** | | | |
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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**To develop further:**
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1. *(from (a) — a matrix-scored criterion the winner is weakest on)*
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2. *(from (b) — a requirement the matrix didn't score, e.g. packaging)*
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3. *(your call — either source)*
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e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Why this matters
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9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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The buns are a stand-in. The design decisions are **identical** when you evaluate your own software design ideas in [C4-2](/sd/C04/C4-2%20Checkpoint%20-%20Evaluation%20Matrix). The matrix tells you which idea proceeds; the develop-further list tells you what your detailed design has to *do*. Both come out of this one activity.
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## See also
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- [Designing an Evaluation Matrix](/sd/C04/Designing%20an%20Evaluation%20Matrix) — the seven design decisions in full
9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- [CHOICE Headphones — Spotting Efficiency and Effectiveness](/sd/C04/CHOICE%20Headphones%20-%20Spotting%20Efficiency%20and%20Effectiveness) — the same matrix discipline applied to a software-flavour example
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- [C4-2 Checkpoint — Your Evaluation Matrix](/sd/C04/C4-2%20Checkpoint%20-%20Evaluation%20Matrix) · [Efficiency vs Effectiveness](/sd/C04/Efficiency%20vs%20Effectiveness)
9e5892 lisa 2026-06-02 06:54:36
SD C04 Hot Cross Bun activity: refocus on the 'which elements to develop further' C4-2 deliverable Drop the stress-test step (tangential to the new focus) and replace with a new Step 4 — Decide what to develop further. Teaches two sources for the develop-further list: (a) where the winner scored weakest in the matrix, and (b) requirements the matrix didn't score (worked example: packaging — out of the matrix because it doesn't change how the bun eats, but still required to 'attract customers to consider buying it'). Add CHOICE hot cross buns review-and-compare source link. Cross-link the new CHOICE Headphones — Spotting Efficiency and Effectiveness page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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- Reference: [CHOICE hot cross buns review-and-compare](https://www.choice.com.au/food-and-drink/bread-cereal-and-grains/bread/review-and-compare/hot-cross-buns)
e71e64 lisa 2026-05-25 22:51:38
SD C04: add Hot Cross Bun Matrix activity page; link from design guide and C04-home Hands-on Use-Modify-Create activity: design + run + defend an evaluation matrix on 2-3 bun brands, with blind tasting, independent scoring, persona stress-test, a blank scoring template, and transfer to C4-2/U4 O1. Original example (not reproducing CHOICE's data); links the CHOICE bun video. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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