2026-06-02 07:19:44lisa:
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>
sd/C04/Activity - Hot Cross Bun Matrix.md ..
@@ 67,6 67,15 @@
>| - **Price per bun is *not* in the Expert Rating** — CHOICE shows it on the card but doesn't fold it into the headline score.
>| - **Buns per pack is nowhere in the calculation** — which confirms why it isn't really a criterion.
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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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>
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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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>
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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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>
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> One artifact, two jobs — and *the matrix has to exist before the scores can mean anything*.
