docs(qfd,quality-house): make quality-house.md own §3 matrix and §4 roof
Drop the duplicated 13x15 strength matrix and 15x15 roof tables from qfd.md; the same data already lives in quality-house.md's TikZ source. qfd.md §3/§4 keep the narrative reading (priority list, conflict list) and point to quality-house.md for the cells and basement sums. Both files' regenerate/maintenance notes flipped to reflect the new contract.
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Julien Calixte
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docs/qfd.md
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docs/qfd.md
@@ -14,9 +14,11 @@ with the v0.2–v1.0 trajectory ([README](../README.md),
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glossary at [`../CONTEXT.md`](../CONTEXT.md).
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Format inspired by the classic House of Quality, kept compact. Strength
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weights: **9** strong, **3** medium, **1** weak, blank none. A TikZ
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rendering of §1–§4 (plus a guessed competitor perception zone) lives in
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[`quality-house.md`](quality-house.md).
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weights: **9** strong, **3** medium, **1** weak, blank none. The §3
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matrix and §4 roof — plus a guessed competitor perception zone — live
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in [`quality-house.md`](quality-house.md); this file owns the WHAT/HOW
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catalogues (§1, §2), the narrative reading of the numbers (§3, §4), and
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the downstream sections (§5–§8).
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---
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@@ -70,26 +72,11 @@ shows what "better" looks like (↑ higher, ↓ lower, → fixed).
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## 3. House of Quality — WHATs × HOWs
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Reading: row × column cell is how strongly the function (H) advances the
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requirement (W). Importance at the bottom is `Σ(weight × strength)` — the
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weighted vote on which functions deserve the most engineering attention.
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| | H1 lat | H2 area | H3 cad | H4 boot | H5 soak | H6 push% | H7 push s | H8 dura | H9 heap | H10 bin | H11 stk | H12 wifi | H13 mA | H14 mod | H15 build |
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| ------- | :-----: | :-----: | :-----: | :-----: | :-----: | :------: | :-------: | :-----: | :-----: | :-----: | :-----: | :------: | :----: | :-----: | :-------: |
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| W1 (10) | **9** | 9 | 3 | | 3 | | | | 1 | | 1 | | | | |
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| W2 (9) | | | | | | **9** | 3 | | 9 | | | 9 | | | |
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| W3 (10) | | | | | | | | **9** | | | | | | | |
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| W4 (7) | | | | | | 3 | | | | | | 3 | | 1 | |
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| W5 (6) | | | | **9** | | | | | | 3 | | | | | |
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| W6 (9) | 3 | | 3 | | **9** | 3 | | 3 | 9 | | 3 | 3 | | | |
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| W7 (8) | 3 | 3 | 3 | | | | | | | | | | 3 | 1 | |
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| W8 (7) | 1 | 9 | **9** | | | | | | | | | | | | |
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| W9 (8) | | | | | | | | | | 1 | 1 | | | **9** | 3 |
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| W10 (5) | | | | | | | | | | 3 | | | 1 | 3 | 1 |
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| W11 (4) | | | | | | | | | | | | | **9** | | |
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| W12 (5) | | | | | | 1 | | 3 | | | | | | 3 | |
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| W13 (7) | | | | | | | | | 3 | | | | | | |
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| **Σ** | **148** | **177** | **144** | **54** | **111** | **134** | **27** | **132** | **193** | **41** | **45** | **129** | **65** | **117** | **29** |
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The matrix (row × column = how strongly function H advances requirement
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W) and its Σ row — the weighted vote `Σ(weight × strength)` on which
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functions deserve the most engineering attention — live in
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[`quality-house.md`](quality-house.md). The Σ totals quoted below are
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from its basement row.
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### Top engineering priorities (from importance)
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@@ -129,25 +116,10 @@ before the runtime decision does.
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The roof shows where pushing one function pushes another the wrong way.
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Classical QFD single-character symbols: **`◎`** strong reinforcement,
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**`○`** mild reinforcement, **`×`** mild conflict, **`⊗`** strong conflict.
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| | H1 | H2 | H3 | H4 | H5 | H6 | H7 | H8 | H9 | H10 | H11 | H12 | H13 | H14 | H15 |
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| ------- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
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| **H1** | — | ◎ | × | | ○ | | | | | | | | × | | |
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| **H2** | | — | ◎ | | | | | | | | | | ○ | | |
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| **H3** | | | — | | | | | | | | | | ○ | | |
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| **H4** | | | | — | | | | | | × | | | | | |
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| **H5** | | | | | — | ○ | | ○ | ⊗ | | | | | | |
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| **H6** | | | | | | — | ○ | | ⊗ | | | ◎ | | | |
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| **H7** | | | | | | | — | | × | | | ◎ | | | |
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| **H8** | | | | | | | | — | | | | | | | |
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| **H9** | | | | | | | | | — | ⊗ | | | | | |
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| **H10** | | | | | | | | | | — | | | | | ⊗ |
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| **H11** | | | | | | | | | | | — | | × | | |
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| **H12** | | | | | | | | | | | | — | | | |
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| **H13** | | | | | | | | | | | | | — | | |
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| **H14** | | | | | | | | | | | | | | — | × |
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| **H15** | | | | | | | | | | | | | | | — |
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**`○`** mild reinforcement, **`×`** mild conflict, **`⊗`** strong
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conflict. The 15×15 roof matrix lives in
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[`quality-house.md`](quality-house.md); the cells that actually shape
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the design are called out below.
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### Conflicts that actually shape the design
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@@ -396,8 +368,10 @@ tall edit region and is not load-bearing.
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- When a spike returns numbers, update §6's "Target" or "Watched on"
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columns — this is the doc that _should_ feel out of date if measured
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reality drifts from estimates.
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- The WHATs change rarely; the HOWs change with each release; the
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matrices are recomputed when either side changes.
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- The WHATs (§1) change rarely; the HOWs (§2) change with each release.
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When either changes, re-score the matrix and recompute the basement Σ
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in [`quality-house.md`](quality-house.md); then check the §3 priority
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list and §4 conflict list here still match the new picture.
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[ADR-001]: adr.md#adr-001-language-and-runtime--rust-on-esp-idf-rs-std
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[ADR-002]: adr.md#adr-002-ui-strategy--custom-widgets-on-embedded-graphics-not-ratatui
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