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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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3babb7 lisa 2026-06-02 07:22:38
SD C04 Hot Cross Bun activity: split Step 2 'what is your matrix built for' from Step 3 tasting Reinstate the persona / design-decisions content (extracted from the previous Step 1) as its own Step 2 focused on what the matrix is built for — the requirement/feature driving the design decisions. Rename Step 1 to 'Read CHOICE's matrix' since it no longer covers persona work, only the inspection of CHOICE's existing matrix. Renumber the rest: old Step 2 (taste blind) -> Step 3; old Step 3 (crown winner) -> Step 4; old Step 4 (develop further) -> Step 5. Internal 'they come back in Step 4' updated to 'Step 5'. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 1 — Read CHOICE's matrix
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 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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625f76 lisa 2026-06-02 07:12:37
SD C04 Hot Cross Bun activity: add CHOICE product cards image (recreated) Embed a recreated CHOICE-style product-card image above the existing data table in Step 1. Same data, two channels: visual cards for recognition (students can match what they see on choice.com.au), table for scanning and screen readers. Real product photos and the four CHOICE data columns (Toasted, Fresh, Buns per pack, Price per bun) are visible at a glance, reinforcing the 'four columns, three criteria' lesson. PNG rendered from HTML (Chrome headless) and committed to the OtterWiki attachment folder. Source line now credits CHOICE for card layout, data and product photography. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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![Woolworths Bakery Chocolate Hot Cross Buns (Expert Rating 95) and Coles Finest Luxurious Fruit Hot Cross Buns (Expert Rating 85) — CHOICE product cards](Activity%20-%20Hot%20Cross%20Bun%20Matrix/choice-cards.png)
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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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| 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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625f76 lisa 2026-06-02 07:12:37
SD C04 Hot Cross Bun activity: add CHOICE product cards image (recreated) Embed a recreated CHOICE-style product-card image above the existing data table in Step 1. Same data, two channels: visual cards for recognition (students can match what they see on choice.com.au), table for scanning and screen readers. Real product photos and the four CHOICE data columns (Toasted, Fresh, Buns per pack, Price per bun) are visible at a glance, reinforcing the 'four columns, three criteria' lesson. PNG rendered from HTML (Chrome headless) and committed to the OtterWiki attachment folder. Source line now credits CHOICE for card layout, data and product photography. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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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. Card layout, data and product photography reproduced from CHOICE for educational analysis.*
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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3167ef lisa 2026-06-02 07:17:49
SD C04 Hot Cross Bun activity: trim Step 1 and add CYU on the 95 calculation Step 1 now ends at the Source line — methodology callout, worked-example matrix, four-moves explainer and persona closing all removed. A new 'Check Your Understanding' section follows, asking 'What is the score of 95 calculated for Woolworths Bakery Chocolate?'. The folded answer reveals the CHOICE Expert Rating is the 50/50 average of Toasted (97%) and Fresh (93%) scores: (97+93)/2 = 95. Cross-checked on Coles: (83+87)/2 = 85. The answer surfaces three lessons: Toasted/ Fresh weighted equally, Price per bun NOT in the Expert Rating, Buns per pack nowhere in the calculation (confirming it isn't a criterion). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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---
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## Check Your Understanding
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What is the score of **95** calculated for *Woolworths Bakery Chocolate*?
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>| **The CHOICE Expert Rating is the average of the Toasted and Fresh scores.**
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>|
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>| Woolies: Toasted **97%**, Fresh **93%** → (97 + 93) ÷ 2 = **95**.
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>| Cross-check on Coles: Toasted **83%**, Fresh **87%** → (83 + 87) ÷ 2 = **85**. ✓
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>|
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>| Three things this tells you about CHOICE's matrix:
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>|
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>| - **Toasted and Fresh are weighted 50/50** in the Expert Rating.
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>| - **Price per bun is *not* in the Expert Rating** — CHOICE shows it on the card but doesn't fold it into the headline score.
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>| - **Buns per pack is nowhere in the calculation** — which confirms why it isn't really a criterion.
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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770a76 lisa 2026-06-02 07:19:44
SD C04 Hot Cross Bun activity: add 'matrix vs scores' callout bridging C4-2 and validation After the CYU section, add an [!IMPORTANT] callout: the CHOICE cards show both the matrix (criteria, weights, formula — the C4-2 checkpoint deliverable) AND the scores (filled in when real products are tested — the validation). One artifact, two jobs; the matrix has to exist before the scores can mean anything. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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> [!IMPORTANT]
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> **The CHOICE cards show two things at once: a matrix and scores.**
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> The **matrix** — which criteria exist, the weights, the formula behind the Expert Rating — is what CHOICE *designed* before tasting any buns. That's the equivalent of your **C4-2 checkpoint**: you build the matrix and defend it.
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> The **scores** — 97%, 93%, 85, 95 — get filled in *afterwards*, when real products are run through the matrix. That's your **validation**: evaluating a finished solution against the matrix you designed.
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> One artifact, two jobs — and *the matrix has to exist before the scores can mean anything*.
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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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---
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da3a6b lisa 2026-06-02 07:26:22
SD C04 Hot Cross Bun activity: link Step 2 heading to the SRS page The matrix is built for what the SRS says the system has to do, so the Step 2 heading now points at the Evaluation Criteria and the SRS page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 2 — What is your matrix built for? (your [SRS](/sd/C04/Evaluation%20Criteria%20and%20the%20SRS))
3babb7 lisa 2026-06-02 07:22:38
SD C04 Hot Cross Bun activity: split Step 2 'what is your matrix built for' from Step 3 tasting Reinstate the persona / design-decisions content (extracted from the previous Step 1) as its own Step 2 focused on what the matrix is built for — the requirement/feature driving the design decisions. Rename Step 1 to 'Read CHOICE's matrix' since it no longer covers persona work, only the inspection of CHOICE's existing matrix. Renumber the rest: old Step 2 (taste blind) -> Step 3; old Step 3 (crown winner) -> Step 4; old Step 4 (develop further) -> Step 5. Internal 'they come back in Step 4' updated to 'Step 5'. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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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.
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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:
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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.
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- **Weights, justified** — where your point of view lives.
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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 5.*
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aee3c3 lisa 2026-06-02 07:30:01
SD C04 Hot Cross Bun activity: promote FR/NFR reminder to a TIP callout Wrap the SRS-scanning reminder in [!TIP] so the actionable advice is visually flagged rather than buried in body text. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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> [!TIP]
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> When you list **your criteria**, scan both halves of your [SRS](/sd/C04/Evaluation%20Criteria%20and%20the%20SRS): the **functional** requirements (*what* the system must do) and the **non-functional** requirements (*how well* — speed, usability, accessibility, security). Every requirement is a candidate matrix row; pick the handful that decide it for *your* persona.
515916 lisa 2026-06-02 07:27:50
SD C04 Hot Cross Bun activity: remind Step 2 to scan FR and NFR for matrix criteria Add a closing sentence after the Step 2 bullets pointing students at both halves of their SRS — functional requirements (what the system must do) and non-functional requirements (how well — speed, usability, accessibility, security) — as candidate matrix rows. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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3babb7 lisa 2026-06-02 07:22:38
SD C04 Hot Cross Bun activity: split Step 2 'what is your matrix built for' from Step 3 tasting Reinstate the persona / design-decisions content (extracted from the previous Step 1) as its own Step 2 focused on what the matrix is built for — the requirement/feature driving the design decisions. Rename Step 1 to 'Read CHOICE's matrix' since it no longer covers persona work, only the inspection of CHOICE's existing matrix. Renumber the rest: old Step 2 (taste blind) -> Step 3; old Step 3 (crown winner) -> Step 4; old Step 4 (develop further) -> Step 5. Internal 'they come back in Step 4' updated to 'Step 5'. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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0febd9 lisa 2026-06-02 11:07:31
SD C04 Hot Cross Bun activity: tag Steps 3-5 as (Validation) Steps 3 (taste blind), 4 (crown winner) and 5 (develop further) all operate on scored data — they're the validation phase as flagged in the earlier 'matrix vs scores' callout. Headings now carry (Validation) so the C4-2-checkpoint vs U4O1-validation split is visible from the table of contents. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 3 — Taste blind, score independently (Validation)
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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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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0febd9 lisa 2026-06-02 11:07:31
SD C04 Hot Cross Bun activity: tag Steps 3-5 as (Validation) Steps 3 (taste blind), 4 (crown winner) and 5 (develop further) all operate on scored data — they're the validation phase as flagged in the earlier 'matrix vs scores' callout. Headings now carry (Validation) so the C4-2-checkpoint vs U4O1-validation split is visible from the table of contents. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 4 — Crown the winner (Validation)
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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0febd9 lisa 2026-06-02 11:07:31
SD C04 Hot Cross Bun activity: tag Steps 3-5 as (Validation) Steps 3 (taste blind), 4 (crown winner) and 5 (develop further) all operate on scored data — they're the validation phase as flagged in the earlier 'matrix vs scores' callout. Headings now carry (Validation) so the C4-2-checkpoint vs U4O1-validation split is visible from the table of contents. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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## Step 5 — Decide what to develop further (Validation)
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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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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---
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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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---
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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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