docs(quality-house): add TikZ rendering with competitor benchmark
Renders qfd.md §1-§4 as a classical House of Quality with 13 WHATs x 15 HOWs, roof correlations, and a perception zone scoring reMarkable 2, Freewrite Traveler, and Pomera DM250 against the v0.1 target. Scores are guessed, not measured; rationale and caveats are in the doc.
This commit is contained in:
Julien Calixte
@@ -14,7 +14,9 @@ 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.
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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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---
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589
docs/quality-house.md
Normal file
589
docs/quality-house.md
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@@ -0,0 +1,589 @@
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# Quality House
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Visual rendering of [`qfd.md`](qfd.md) — the same 13 WHATs × 15 HOWs as a
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classical House of Quality. The roof carries function-vs-function
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correlations from §4; the basement carries v0.1 targets (§2) plus the
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weighted-vote sums and relative weights from §3.
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`qfd.md` is authoritative — this file lags it. Regenerate when the matrix
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or roof changes; if numbers diverge, trust `qfd.md`.
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Out of scope here: §5 component mapping (would need a second house),
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§6 critical performance budget (already a curated rank), §7 tradeoffs
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(narrative), §8 inconsistencies (history).
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The perception zone scores four products against the WHATs on a 0–5 scale.
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**These are educated guesses, not measurements** — see the
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[scoring rationale](#perception-scores-guessed) below for what each cell
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is based on. Useful for self-positioning ("where do we land vs the
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market"), not as a fair head-to-head buyer's guide.
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```tikz
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% =====================================================================
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% QFD "House of Quality" preamble
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% =====================================================================
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\usetikzlibrary{arrows.meta, positioning, shapes.geometric, shapes.misc, calc, fit, backgrounds}
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\newif\ifqfdshowroof \qfdshowrooftrue
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\newif\ifqfdshowbasement \qfdshowbasementtrue
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\newif\ifqfdshowcompetitive \qfdshowcompetitivetrue
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\newif\ifqfdshowlegend \qfdshowlegendtrue
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\newif\ifqfdshowimportance \qfdshowimportancetrue
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\newif\ifqfdshowcorrlegend \qfdshowcorrlegendtrue
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\newif\ifqfdshowevallegend \qfdshowevallegendtrue
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\def\qfdNW{5}
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\def\qfdNH{5}
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\def\qfdWhatW{4.0}
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\def\qfdImpW{0.9}
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\def\qfdCmpW{3}
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\def\qfdHdrH{2.6}
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\def\qfdBasementN{4}
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\def\qfdWhatsTitle{Customer needs}
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\def\qfdImpTitle{Imp.\ \%}
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\def\qfdPerceptionTitle{Comparative evaluation}
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\def\qfdPoorLabel{poor}
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\def\qfdExcellentLabel{excellent}
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\def\qfdAltOneLabel{Our product}
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\def\qfdAltTwoLabel{Competitor A}
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\def\qfdAltThreeLabel{Competitor B}
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\def\qfdRelTitle{Relation}
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\def\qfdCorrTitle{Correlation}
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\def\qfdEvalTitle{Evaluation}
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\tikzset{
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qfdthin/.style ={line width=0.35pt},
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qfdmed/.style ={line width=0.7pt},
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qfdstrong/.style={circle, draw, fill=black,
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minimum size=7pt, inner sep=0pt},
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qfdmod/.style ={circle, draw,
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minimum size=7pt, inner sep=0pt, line width=0.8pt},
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qfdweak/.style ={regular polygon, regular polygon sides=3, draw,
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minimum size=8.5pt, inner sep=0pt, line width=0.7pt},
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qfdrel/.is choice,
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qfdrel/S/.style={qfdstrong},
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qfdrel/M/.style={qfdmod},
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qfdrel/W/.style={qfdweak},
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qfdalt1mk/.style={circle, draw, fill=black,
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minimum size=6pt, inner sep=0pt, line width=1pt},
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qfdalt1ln/.style={line width=1.2pt},
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qfdalt2mk/.style={regular polygon, regular polygon sides=3, draw,
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fill=black, minimum size=6pt, inner sep=0pt,
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line width=0.7pt},
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qfdalt2ln/.style={line width=0.7pt, dashed},
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qfdalt3mk/.style={rectangle, draw, fill=black,
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minimum size=5pt, inner sep=0pt, line width=0.7pt},
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qfdalt3ln/.style={line width=0.7pt, dotted},
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}
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\newcommand{\qfdDrawGrid}{%
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\foreach \c in {1,...,\qfdNHm} \draw[qfdthin] (\c, 0) -- (\c, -\qfdNW);
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\foreach \r in {1,...,\qfdNWm} \draw[qfdthin] (0, -\r) -- (\qfdNH, -\r);
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\foreach \r in {1,...,\qfdNWm}
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\draw[qfdthin] (\qfdLeftEdge, -\r) -- (0, -\r);
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\ifqfdshowroof
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\foreach \c in {1,...,\qfdNHm}
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\draw[qfdthin] (\c, 0) -- (\c, \qfdHdrH);
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\fi
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\ifqfdshowcompetitive
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\foreach \r in {1,...,\qfdNWm}
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\draw[qfdthin] (\qfdNH, -\r) -- (\qfdNH+\qfdCmpW, -\r);
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\fi
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\ifqfdshowbasement
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\foreach \r in {1,...,\qfdBasementN}
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\draw[qfdthin] (0, -\qfdNW-\r) -- (\qfdNH, -\qfdNW-\r);
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\foreach \c in {1,...,\qfdNHm}
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\draw[qfdthin] (\c, -\qfdNW) -- (\c, -\qfdNW-\qfdBasementN);
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\fi
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}
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\newcommand{\qfdDrawRoof}{%
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\ifqfdshowroof
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\foreach \k in {1,...,\qfdNHm} {%
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\pgfmathsetmacro{\rx}{(\k+\qfdNH)/2}
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\pgfmathsetmacro{\ry}{\qfdHdrH + (\qfdNH-\k)/2}
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\pgfmathsetmacro{\lx}{\k/2}
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\pgfmathsetmacro{\ly}{\qfdHdrH + \k/2}
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\draw[qfdthin] (\k, \qfdHdrH) -- (\rx, \ry);
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\draw[qfdthin] (\k, \qfdHdrH) -- (\lx, \ly);
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}%
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\draw[qfdmed] (0, \qfdHdrH)
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-- (\qfdNH/2, \qfdApexY) -- (\qfdNH, \qfdHdrH);
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\foreach \i in {1,...,\qfdNH}
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\foreach \k in {1,...,\qfdNH} {%
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\pgfmathtruncatemacro{\jj}{\i+\k}
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\ifnum\jj>\qfdNH\relax\else
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\pgfmathsetmacro{\xx}{\i + \k/2 - 0.5}
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\pgfmathsetmacro{\yy}{\qfdHdrH + \k/2}
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\coordinate (C-\i-\jj) at (\xx, \yy);
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\fi
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}%
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\fi
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}
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\newcommand{\qfdDrawScale}{%
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\ifqfdshowcompetitive
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\foreach \tk in {0,1,2,3,4,5} {%
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\pgfmathsetmacro{\tx}{\qfdNH + (\tk+0.5)*\qfdCmpW/6}
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\node[anchor=south, font=\scriptsize] at (\tx, 0.02) {\tk};
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}%
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\node[anchor=south, font=\scriptsize\bfseries, align=center]
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at ({\qfdNH + \qfdCmpW/2}, 0.7) {\qfdPerceptionTitle};
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\node[anchor=north, font=\scriptsize\itshape]
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at ({\qfdNH + 0.45}, -\qfdNW) {\qfdPoorLabel};
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\node[anchor=north, font=\scriptsize\itshape]
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at ({\qfdNH + \qfdCmpW - 0.45}, -\qfdNW) {\qfdExcellentLabel};
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\fi
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}
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\newcommand{\qfdDrawZoneTitles}{%
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\ifqfdshowimportance
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\node[rotate=90, anchor=west, font=\footnotesize\bfseries]
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at ({-\qfdImpW/2}, 0.12) {\qfdImpTitle};
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\fi
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\node[font=\scriptsize\bfseries, align=center, text width=\qfdWhatW cm]
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at ({\qfdLeftEdge + \qfdWhatW/2},
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{\ifqfdshowroof \qfdHdrH/2 \else 0.6 \fi}) {\qfdWhatsTitle};
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}
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\newcommand{\qfdDrawFrames}{%
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\begin{scope}[qfdmed]
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\draw (\qfdLeftEdge, 0) rectangle (\qfdNH, -\qfdNW);
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\ifqfdshowimportance \draw (-\qfdImpW, 0) -- (-\qfdImpW, -\qfdNW); \fi
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\draw (0, 0) -- (0, -\qfdNW);
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\ifqfdshowroof
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\draw (0, 0) rectangle (\qfdNH, \qfdHdrH); \fi
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\ifqfdshowbasement
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\draw (0, -\qfdNW) rectangle (\qfdNH, -\qfdNW-\qfdBasementN); \fi
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\ifqfdshowcompetitive
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\draw (\qfdNH, 0) rectangle (\qfdNH+\qfdCmpW, -\qfdNW); \fi
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\end{scope}
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}
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\newcommand{\qfdDrawLegend}{%
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\ifqfdshowlegend
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\pgfmathsetmacro{\qfdLegX}{%
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\qfdNH + \ifqfdshowcompetitive \qfdCmpW + 0.7 \else 0.7 \fi}
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\pgfmathsetmacro{\qfdLegBottom}{%
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-2.05
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\ifqfdshowroof \ifqfdshowcorrlegend - 2.55 \fi \fi
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\ifqfdshowcompetitive \ifqfdshowevallegend - 2.20 \fi \fi}
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\pgfmathsetmacro{\qfdLegY}{\qfdHdrH - 0.4}
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\begin{scope}[shift={(\qfdLegX, \qfdLegY)}]
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\draw[qfdmed, rounded corners=2pt]
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(-0.15, 0.4) rectangle (4.5, \qfdLegBottom);
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\node[anchor=west, font=\footnotesize\bfseries] at (0, 0.1)
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{\qfdRelTitle};
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\draw[qfdthin] (0, -0.15) -- (4.35, -0.15);
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\node[qfdstrong] at (0.22, -0.5) {};
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\node[anchor=west] at (0.5, -0.5) {Strong (9)};
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\node[qfdmod] at (0.22, -0.95) {};
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\node[anchor=west] at (0.5, -0.95) {Medium (3)};
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\node[qfdweak] at (0.22, -1.4) {};
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\node[anchor=west] at (0.5, -1.4) {Weak (1)};
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\ifqfdshowroof \ifqfdshowcorrlegend
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\node[anchor=west, font=\footnotesize\bfseries] at (0, -2.10)
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{\qfdCorrTitle};
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\draw[qfdthin] (0, -2.35) -- (4.35, -2.35);
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\node[anchor=west] at (0, -2.70) {{$+\!+$}\quad very positive};
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\node[anchor=west] at (0, -3.05) {{$+$\phantom{$+$}}\quad positive};
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\node[anchor=west] at (0, -3.40) {{$-$\phantom{$-$}}\quad negative};
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\node[anchor=west] at (0, -3.75) {{$-\!-$}\quad very negative};
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\fi \fi
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\ifqfdshowcompetitive \ifqfdshowevallegend
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\pgfmathsetmacro{\qfdEvalTop}{%
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-2.10 \ifqfdshowroof\ifqfdshowcorrlegend - 2.55 \fi\fi}
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\node[anchor=west, font=\footnotesize\bfseries]
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at (0, \qfdEvalTop) {\qfdEvalTitle};
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\pgfmathsetmacro{\qfdEvalSep}{\qfdEvalTop - 0.25}
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\draw[qfdthin] (0, \qfdEvalSep) -- (4.35, \qfdEvalSep);
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\pgfmathsetmacro{\qfdLegA}{\qfdEvalTop - 0.55}
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\draw[qfdalt1ln] (0.05, \qfdLegA) -- (0.45, \qfdLegA);
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\node[qfdalt1mk] at (0.25, \qfdLegA) {};
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\node[anchor=west, font=\bfseries] at (0.55, \qfdLegA)
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{\qfdAltOneLabel};
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\pgfmathsetmacro{\qfdLegB}{\qfdEvalTop - 0.95}
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\draw[qfdalt2ln] (0.05, \qfdLegB) -- (0.45, \qfdLegB);
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\node[qfdalt2mk] at (0.25, \qfdLegB) {};
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\node[anchor=west] at (0.55, \qfdLegB) {\qfdAltTwoLabel};
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\pgfmathsetmacro{\qfdLegC}{\qfdEvalTop - 1.35}
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\draw[qfdalt3ln] (0.05, \qfdLegC) -- (0.45, \qfdLegC);
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\node[qfdalt3mk] at (0.25, \qfdLegC) {};
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\node[anchor=west] at (0.55, \qfdLegC) {\qfdAltThreeLabel};
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\fi \fi
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\end{scope}
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\fi
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}
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\newenvironment{qfdhouse}{%
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\begin{tikzpicture}[x=1cm, y=1cm, font=\scriptsize,
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line cap=round, line join=round]
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\ifqfdshowimportance
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\pgfmathsetmacro{\qfdLeftEdge}{-\qfdWhatW-\qfdImpW}
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\else
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\pgfmathsetmacro{\qfdLeftEdge}{-\qfdWhatW}
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\fi
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\pgfmathsetmacro{\qfdApexY}{\qfdHdrH + \qfdNH/2}
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\pgfmathtruncatemacro{\qfdNHm}{\qfdNH - 1}
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\pgfmathtruncatemacro{\qfdNWm}{\qfdNW - 1}
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\qfdDrawGrid
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\qfdDrawRoof
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\qfdDrawScale
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\qfdDrawZoneTitles
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}{%
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\qfdDrawFrames
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\qfdDrawLegend
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\end{tikzpicture}%
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}
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% --- Dimensions tuned for the typewriter QFD (13 W x 15 H) ---
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\def\qfdNW{13}
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\def\qfdNH{15}
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\def\qfdWhatW{4.6}
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\def\qfdImpW{0.7}
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\def\qfdHdrH{3.2}
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\def\qfdBasementN{3}
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\def\qfdCmpW{3.4}
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\qfdshowlegendfalse % we draw a 4-alternative legend manually
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\def\qfdWhatsTitle{User-facing requirements (W)}
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\def\qfdImpTitle{Weight}
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\def\qfdPerceptionTitle{Competitive perception (0–5, guessed)}
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\def\qfdPoorLabel{poor}
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\def\qfdExcellentLabel{excellent}
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% 4th alternative style for the perception zone (Pomera).
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\tikzset{
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qfdalt4mk/.style={diamond, aspect=1, draw, fill=white,
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minimum size=6pt, inner sep=0pt, line width=0.9pt},
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qfdalt4ln/.style={line width=0.7pt, dash dot},
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}
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\begin{document}
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\begin{qfdhouse}
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% ---------- WHATs (left column) ----------
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\foreach \r/\t in {%
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1/{W1 Sub-second visible response to typing},
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2/{W2 Publishing is one deliberate action away},
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3/{W3 Pulling power never corrupts the file},
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4/{W4 Provisioning never interrupts a writing session},
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5/{W5 Quick boot to a writing cursor},
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6/{W6 Long sessions without crash, lag, drift},
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7/{W7 Nothing on the device competes with prose},
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8/{W8 The UI never moves except when I move it},
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9/{W9 Codebase absorbs the planned roadmap},
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10/{W10 I can repair or fork it with hobbyist tools},
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11/{W11 Multi-day battery life (v0.8 onward)},
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12/{W12 Local-only files coexist with git scope (v0.5+)},
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13/{W13 Typography sets a writing-tool tone}%
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}
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\node[anchor=west, font=\scriptsize, text width=\qfdWhatW cm,
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align=left]
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at ({\qfdLeftEdge + 0.1}, {-\r + 0.5}) {\t};
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% ---------- Importance (raw 1-10 weight) ----------
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\foreach \r/\w in {1/10, 2/9, 3/10, 4/7, 5/6, 6/9, 7/8, 8/7,
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9/8, 10/5, 11/4, 12/5, 13/7}
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\node[font=\scriptsize] at ({-\qfdImpW/2}, {-\r + 0.5}) {\w};
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% ---------- HOWs (rotated column titles) ----------
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\foreach \c/\t in {%
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1/{H1 Keypress$\to$glyph latency},
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2/{H2 Refresh area per keystroke},
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3/{H3 Full-refresh cadence},
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4/{H4 Cold boot to cursor},
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5/{H5 Continuous-typing endurance},
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6/{H6 Push success rate},
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7/{H7 Push end-to-end time},
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8/{H8 Save durability vs power loss},
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9/{H9 PSRAM heap headroom},
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10/{H10 Firmware binary size},
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11/{H11 Total stack budget},
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12/{H12 Wi-Fi reconnect time},
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13/{H13 Idle / typing / push current},
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14/{H14 Module / API surface count},
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15/{H15 Clean release build time}%
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}
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\node[rotate=90, anchor=west, font=\scriptsize]
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at ({\c - 0.5}, 0.15) {\t};
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% ---------- Relation matrix (S=9, M=3, W=1) ----------
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% W1 row 1: H1S H2S H3M H5M H9W H11W
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\node[qfdrel/S] at ({1 - 0.5}, {-1 + 0.5}) {};
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\node[qfdrel/S] at ({2 - 0.5}, {-1 + 0.5}) {};
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\node[qfdrel/M] at ({3 - 0.5}, {-1 + 0.5}) {};
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\node[qfdrel/M] at ({5 - 0.5}, {-1 + 0.5}) {};
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\node[qfdrel/W] at ({9 - 0.5}, {-1 + 0.5}) {};
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\node[qfdrel/W] at ({11 - 0.5}, {-1 + 0.5}) {};
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% W2 row 2: H6S H7M H9S H12S
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\node[qfdrel/S] at ({6 - 0.5}, {-2 + 0.5}) {};
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\node[qfdrel/M] at ({7 - 0.5}, {-2 + 0.5}) {};
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\node[qfdrel/S] at ({9 - 0.5}, {-2 + 0.5}) {};
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\node[qfdrel/S] at ({12 - 0.5}, {-2 + 0.5}) {};
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% W3 row 3: H8S
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\node[qfdrel/S] at ({8 - 0.5}, {-3 + 0.5}) {};
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% W4 row 4: H6M H12M H14W
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\node[qfdrel/M] at ({6 - 0.5}, {-4 + 0.5}) {};
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\node[qfdrel/M] at ({12 - 0.5}, {-4 + 0.5}) {};
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\node[qfdrel/W] at ({14 - 0.5}, {-4 + 0.5}) {};
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% W5 row 5: H4S H10M
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\node[qfdrel/S] at ({4 - 0.5}, {-5 + 0.5}) {};
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\node[qfdrel/M] at ({10 - 0.5}, {-5 + 0.5}) {};
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% W6 row 6: H1M H3M H5S H6M H8M H9S H11M H12M
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\node[qfdrel/M] at ({1 - 0.5}, {-6 + 0.5}) {};
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\node[qfdrel/M] at ({3 - 0.5}, {-6 + 0.5}) {};
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\node[qfdrel/S] at ({5 - 0.5}, {-6 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({6 - 0.5}, {-6 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({8 - 0.5}, {-6 + 0.5}) {};
|
||||
\node[qfdrel/S] at ({9 - 0.5}, {-6 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({11 - 0.5}, {-6 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({12 - 0.5}, {-6 + 0.5}) {};
|
||||
|
||||
% W7 row 7: H1M H2M H3M H13M H14W
|
||||
\node[qfdrel/M] at ({1 - 0.5}, {-7 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({2 - 0.5}, {-7 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({3 - 0.5}, {-7 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({13 - 0.5}, {-7 + 0.5}) {};
|
||||
\node[qfdrel/W] at ({14 - 0.5}, {-7 + 0.5}) {};
|
||||
|
||||
% W8 row 8: H1W H2S H3S
|
||||
\node[qfdrel/W] at ({1 - 0.5}, {-8 + 0.5}) {};
|
||||
\node[qfdrel/S] at ({2 - 0.5}, {-8 + 0.5}) {};
|
||||
\node[qfdrel/S] at ({3 - 0.5}, {-8 + 0.5}) {};
|
||||
|
||||
% W9 row 9: H10W H11W H14S H15M
|
||||
\node[qfdrel/W] at ({10 - 0.5}, {-9 + 0.5}) {};
|
||||
\node[qfdrel/W] at ({11 - 0.5}, {-9 + 0.5}) {};
|
||||
\node[qfdrel/S] at ({14 - 0.5}, {-9 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({15 - 0.5}, {-9 + 0.5}) {};
|
||||
|
||||
% W10 row 10: H10M H13W H14M H15W
|
||||
\node[qfdrel/M] at ({10 - 0.5}, {-10 + 0.5}) {};
|
||||
\node[qfdrel/W] at ({13 - 0.5}, {-10 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({14 - 0.5}, {-10 + 0.5}) {};
|
||||
\node[qfdrel/W] at ({15 - 0.5}, {-10 + 0.5}) {};
|
||||
|
||||
% W11 row 11: H13S
|
||||
\node[qfdrel/S] at ({13 - 0.5}, {-11 + 0.5}) {};
|
||||
|
||||
% W12 row 12: H6W H8M H14M
|
||||
\node[qfdrel/W] at ({6 - 0.5}, {-12 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({8 - 0.5}, {-12 + 0.5}) {};
|
||||
\node[qfdrel/M] at ({14 - 0.5}, {-12 + 0.5}) {};
|
||||
|
||||
% W13 row 13: H9M
|
||||
\node[qfdrel/M] at ({9 - 0.5}, {-13 + 0.5}) {};
|
||||
|
||||
% ---------- Roof correlations ----------
|
||||
\node[font=\scriptsize] at (C-1-2) {$+\!+$}; % H1-H2 strong reinforce
|
||||
\node[font=\scriptsize] at (C-1-3) {$-$}; % H1-H3 mild conflict
|
||||
\node[font=\scriptsize] at (C-1-5) {$+$}; % H1-H5 mild reinforce
|
||||
\node[font=\scriptsize] at (C-1-13) {$-$}; % H1-H13 mild conflict
|
||||
\node[font=\scriptsize] at (C-2-3) {$+\!+$}; % H2-H3 strong reinforce
|
||||
\node[font=\scriptsize] at (C-2-13) {$+$}; % H2-H13
|
||||
\node[font=\scriptsize] at (C-3-13) {$+$}; % H3-H13
|
||||
\node[font=\scriptsize] at (C-4-10) {$-$}; % H4-H10 boot vs binary
|
||||
\node[font=\scriptsize] at (C-5-6) {$+$}; % H5-H6
|
||||
\node[font=\scriptsize] at (C-5-8) {$+$}; % H5-H8
|
||||
\node[font=\scriptsize] at (C-5-9) {$-\!-$}; % H5-H9 soak vs heap
|
||||
\node[font=\scriptsize] at (C-6-7) {$+$}; % H6-H7
|
||||
\node[font=\scriptsize] at (C-6-9) {$-\!-$}; % H6-H9 push vs heap
|
||||
\node[font=\scriptsize] at (C-6-12) {$+\!+$}; % H6-H12
|
||||
\node[font=\scriptsize] at (C-7-9) {$-$}; % H7-H9
|
||||
\node[font=\scriptsize] at (C-7-12) {$+\!+$}; % H7-H12
|
||||
\node[font=\scriptsize] at (C-9-10) {$-\!-$}; % H9-H10 heap vs binary
|
||||
\node[font=\scriptsize] at (C-10-15) {$-\!-$}; % H10-H15 binary vs build
|
||||
\node[font=\scriptsize] at (C-11-13) {$-$}; % H11-H13
|
||||
\node[font=\scriptsize] at (C-14-15) {$-$}; % H14-H15 modularity vs build
|
||||
|
||||
% ---------- Basement: target / abs weight / rel weight % ----------
|
||||
\foreach \c/\tgt/\abs/\rel in {%
|
||||
1/{$\leq$200\,ms}/148/10,
|
||||
2/{$\leq$1 line}/177/11,
|
||||
3/{1 : 20}/144/9,
|
||||
4/{$\leq$5\,s}/54/3,
|
||||
5/{$\geq$1\,h}/111/7,
|
||||
6/{$\geq$95\,\%}/134/9,
|
||||
7/{$\leq$30\,s}/27/2,
|
||||
8/{100\,\%}/132/9,
|
||||
9/{$\geq$1\,MB}/193/12,
|
||||
10/{$\leq$2\,MB}/41/3,
|
||||
11/{$\leq$80\,KB}/45/3,
|
||||
12/{$\leq$30\,s}/129/8,
|
||||
13/{obs.}/65/4,
|
||||
14/{$\leq$8}/117/8,
|
||||
15/{$\leq$7\,min}/29/2%
|
||||
} {
|
||||
\node[font=\scriptsize] at ({\c - 0.5}, {-\qfdNW - 0.5}) {\tgt};
|
||||
\node[font=\scriptsize] at ({\c - 0.5}, {-\qfdNW - 1.5}) {\abs};
|
||||
\node[font=\scriptsize\bfseries]
|
||||
at ({\c - 0.5}, {-\qfdNW - 2.5}) {\rel};
|
||||
}
|
||||
|
||||
% ---------- Basement row labels (in the margin below WHATs) ----------
|
||||
\foreach \k/\lbl in {1/{Target (v0.1)}, 2/{$\Sigma$ abs}, 3/{Rel.\ \%}}
|
||||
\node[anchor=east, font=\scriptsize\itshape]
|
||||
at ({-0.1}, {-\qfdNW - \k + 0.5}) {\lbl};
|
||||
|
||||
% ---------- Perception zone: 4 products x 13 WHATs (0-5 scores) ----------
|
||||
% Columns: \so=Ours target, \st=reMarkable 2 + Type Folio,
|
||||
% \sf=Freewrite Traveler, \sg=Pomera DM250.
|
||||
\foreach \r/\so/\st/\sf/\sg in {%
|
||||
1/4/3/3/5,
|
||||
2/5/4/4/2,
|
||||
3/4/4/2/2,
|
||||
4/5/2/2/5,
|
||||
5/4/3/3/5,
|
||||
6/3/3/4/5,
|
||||
7/5/2/5/5,
|
||||
8/4/3/4/5,
|
||||
9/4/3/1/1,
|
||||
10/5/4/2/1,
|
||||
11/1/5/5/4,
|
||||
12/3/1/2/3,
|
||||
13/3/5/2/2%
|
||||
} {
|
||||
\pgfmathsetmacro{\xo}{\qfdNH + (\so + 0.5)*\qfdCmpW/6}
|
||||
\pgfmathsetmacro{\xt}{\qfdNH + (\st + 0.5)*\qfdCmpW/6}
|
||||
\pgfmathsetmacro{\xf}{\qfdNH + (\sf + 0.5)*\qfdCmpW/6}
|
||||
\pgfmathsetmacro{\xg}{\qfdNH + (\sg + 0.5)*\qfdCmpW/6}
|
||||
\node[qfdalt1mk] at (\xo, {-\r + 0.5}) {};
|
||||
\node[qfdalt2mk] at (\xt, {-\r + 0.5}) {};
|
||||
\node[qfdalt3mk] at (\xf, {-\r + 0.5}) {};
|
||||
\node[qfdalt4mk] at (\xg, {-\r + 0.5}) {};
|
||||
}
|
||||
|
||||
% ---------- Manual legend (4 alternatives, placed right of zones) ----------
|
||||
\pgfmathsetmacro{\qfdLegX}{\qfdNH + \qfdCmpW + 0.7}
|
||||
\begin{scope}[shift={(\qfdLegX, \qfdHdrH - 0.4)}]
|
||||
\draw[qfdmed, rounded corners=2pt]
|
||||
(-0.15, 0.4) rectangle (5.1, -7.05);
|
||||
% Relations
|
||||
\node[anchor=west, font=\footnotesize\bfseries] at (0, 0.1)
|
||||
{Relation};
|
||||
\draw[qfdthin] (0, -0.15) -- (4.95, -0.15);
|
||||
\node[qfdstrong] at (0.22, -0.5) {};
|
||||
\node[anchor=west] at (0.5, -0.5) {Strong (9)};
|
||||
\node[qfdmod] at (0.22, -0.95) {};
|
||||
\node[anchor=west] at (0.5, -0.95) {Medium (3)};
|
||||
\node[qfdweak] at (0.22, -1.4) {};
|
||||
\node[anchor=west] at (0.5, -1.4) {Weak (1)};
|
||||
% Correlation
|
||||
\node[anchor=west, font=\footnotesize\bfseries] at (0, -2.10)
|
||||
{Correlation};
|
||||
\draw[qfdthin] (0, -2.35) -- (4.95, -2.35);
|
||||
\node[anchor=west] at (0, -2.70) {{$+\!+$}\quad very positive};
|
||||
\node[anchor=west] at (0, -3.05) {{$+$\phantom{$+$}}\quad positive};
|
||||
\node[anchor=west] at (0, -3.40) {{$-$\phantom{$-$}}\quad negative};
|
||||
\node[anchor=west] at (0, -3.75) {{$-\!-$}\quad very negative};
|
||||
% Perception
|
||||
\node[anchor=west, font=\footnotesize\bfseries] at (0, -4.20)
|
||||
{Perception};
|
||||
\draw[qfdthin] (0, -4.45) -- (4.95, -4.45);
|
||||
\draw[qfdalt1ln] (0.05, -4.80) -- (0.45, -4.80);
|
||||
\node[qfdalt1mk] at (0.25, -4.80) {};
|
||||
\node[anchor=west, font=\bfseries] at (0.55, -4.80)
|
||||
{Ours (v0.1 target)};
|
||||
\draw[qfdalt2ln] (0.05, -5.25) -- (0.45, -5.25);
|
||||
\node[qfdalt2mk] at (0.25, -5.25) {};
|
||||
\node[anchor=west] at (0.55, -5.25) {reMarkable 2 + Type Folio};
|
||||
\draw[qfdalt3ln] (0.05, -5.70) -- (0.45, -5.70);
|
||||
\node[qfdalt3mk] at (0.25, -5.70) {};
|
||||
\node[anchor=west] at (0.55, -5.70) {Freewrite Traveler};
|
||||
\draw[qfdalt4ln] (0.05, -6.15) -- (0.45, -6.15);
|
||||
\node[qfdalt4mk] at (0.25, -6.15) {};
|
||||
\node[anchor=west] at (0.55, -6.15) {Pomera DM250};
|
||||
\node[anchor=west, font=\scriptsize\itshape] at (0, -6.70)
|
||||
{0 = poor, 5 = excellent};
|
||||
\end{scope}
|
||||
|
||||
\end{qfdhouse}
|
||||
\end{document}
|
||||
```
|
||||
|
||||
## Perception scores (guessed)
|
||||
|
||||
Four products on the 0–5 scale, scored against each WHAT. Reference
|
||||
configurations: **reMarkable 2 + Type Folio**, **Freewrite Traveler**,
|
||||
**Pomera DM250** (DM250 has a reflective monochrome LCD, not e-ink — flagged
|
||||
in W1 / W8). "Ours" is the v0.1 target from `qfd.md` §2, not measured yet.
|
||||
|
||||
| ID | WHAT (truncated) | Ours | reM. | Frw. | Pom. | Rationale (shortest defensible) |
|
||||
| --- | ----------------------------------------------- | :--: | :--: | :--: | :--: | ---------------------------------------------------------------------------------------------------------------- |
|
||||
| W1 | Sub-second response to typing | 4 | 3 | 3 | 5 | Ours targets ≤200 ms; reMarkable + Freewrite (e-ink) are visibly laggy; Pomera's reflective LCD is near-zero. |
|
||||
| W2 | Publishing is one deliberate action away | 5 | 4 | 4 | 2 | Ctrl-G atomic; reMarkable + Freewrite cloud-sync is one-tap but not git; Pomera = USB/SD copy or QR transfer. |
|
||||
| W3 | Pulling power never corrupts the file | 4 | 4 | 2 | 2 | Ours: atomic-rename + fsync. reMarkable journals. Freewrite + Pomera: forum reports of corruption on yank. |
|
||||
| W4 | Provisioning never interrupts writing | 5 | 2 | 2 | 5 | Ours v0.1: build-time config (dev-only). reM/Frw need Wi-Fi + account. Pomera: literally none. |
|
||||
| W5 | Quick boot to a writing cursor | 4 | 3 | 3 | 5 | Ours target ≤5 s. reMarkable cold-boots ~20 s (great from sleep). Pomera ~3 s. |
|
||||
| W6 | Long sessions without crash / lag / drift | 3 | 3 | 4 | 5 | Ours unproven (1 h target). Freewrite famously stable. Pomera firmware is decades-mature. |
|
||||
| W7 | Nothing on the device competes with prose | 5 | 2 | 5 | 5 | reMarkable has apps, menus, drawing, PDFs. Freewrite + Pomera are single-purpose; ours by design. |
|
||||
| W8 | The UI never moves except when I move it | 4 | 3 | 4 | 5 | reMarkable animates more; ours uses dirty-rects; Freewrite minimal motion; Pomera near-static LCD. |
|
||||
| W9 | Codebase absorbs the planned roadmap | 4 | 3 | 1 | 1 | Modular Rust ours; reMarkable is hackable Linux; Freewrite + Pomera are closed firmware. |
|
||||
| W10 | I can repair or fork it with hobbyist tools | 5 | 4 | 2 | 1 | Ours: open BOM + ESP32. reMarkable: rooted Linux + community ROMs. Freewrite + Pomera: closed. |
|
||||
| W11 | Multi-day battery life (v0.8 onward) | 1 | 5 | 5 | 4 | Ours v0.1 = wall-powered (battery deferred). reMarkable + Freewrite Traveler legendary. Pomera ~24 h. |
|
||||
| W12 | Local-only files coexist with git scope | 3 | 1 | 2 | 3 | Ours v0.5+ design. reMarkable cloud-only. Freewrite has local + Postbox but no VCS. Pomera = pure local. |
|
||||
| W13 | Typography sets a writing-tool tone | 3 | 5 | 2 | 2 | Ours v0.1: single mono (serif option in v1.0). reMarkable: rich type rendering. Freewrite + Pomera: utilitarian. |
|
||||
|
||||
**Totals** (sum across 13 WHATs, no weighting): Ours 50, Pomera 45,
|
||||
reMarkable 42, Freewrite 39. Pomera ranking second is the useful signal —
|
||||
we're effectively building "Pomera + Wi-Fi + git + hackable BOM", which
|
||||
re-confirms the differentiation thesis from `README.md`.
|
||||
|
||||
Weighted totals (Σ score × W weight) tell the same story with more
|
||||
contrast — left as exercise; the unweighted view is enough to read the
|
||||
picture.
|
||||
|
||||
### Caveats
|
||||
|
||||
- **Single-rater bias.** All thirteen rows are scored from the project
|
||||
author's POV. A reMarkable buyer would weight W11 (battery) at 10 and
|
||||
W12 (git) at 1, flipping the totals.
|
||||
- **Configuration matters.** Freewrite Smart Typewriter (e-ink) scores
|
||||
differently from Traveler (LCD) on W1 / W5. The table picks Traveler
|
||||
as the most direct competitor.
|
||||
- **W3 / W6 Freewrite scores are anecdotal.** Forum reports, not bench
|
||||
data. Treat the 2 / 4 as "we'd need to test this" rather than fact.
|
||||
- **No price column.** Ours-as-BOM is materially cheaper than the
|
||||
competitors but cost is not a WHAT in `qfd.md` §1, so it's absent here.
|
||||
Worth a row if a v0.x WHAT ever calls it out.
|
||||
|
||||
## Reading the house
|
||||
|
||||
- **Importance (left column)** is the raw 1–10 weight from `qfd.md` §1, not
|
||||
a normalised %, so adding stays cheap when a WHAT shifts. Sum of weights
|
||||
is 95; treat each unit as ~1.05 % if you want a percentage view.
|
||||
- **Roof** carries the §4 symbols translated into classical QFD glyphs:
|
||||
`++` strong reinforcement (`◎`), `+` mild reinforcement (`○`), `−` mild
|
||||
conflict (`×`), `−−` strong conflict (`⊗`).
|
||||
- **Basement rows** are: v0.1 target → §3 column sum (`Σ` of
|
||||
`weight × strength`) → relative weight as integer % of total (1546).
|
||||
Relative weights round to 100.
|
||||
- **H7, H10, H15** (push time, binary size, build time) sit at the bottom
|
||||
of the basement — knowingly-paid costs per `qfd.md` §7, not signals to
|
||||
optimise harder.
|
||||
|
||||
## Regenerating
|
||||
|
||||
When `qfd.md` §1–§4 change, re-derive:
|
||||
|
||||
1. Importance column → §1 weight column.
|
||||
2. HOW titles + targets → §2 (v0.1 target column).
|
||||
3. Relation cells → §3 matrix strengths (9 → `S`, 3 → `M`, 1 → `W`).
|
||||
4. Roof symbols → §4 (◎→`++`, ○→`+`, ×→`−`, ⊗→`−−`).
|
||||
5. Basement Σ + Rel% → §3 bottom row, divided by the new total.
|
||||
6. Perception scores are **not** derived from `qfd.md` — they live only in
|
||||
this file. Update them when (a) a competitor ships a relevant change,
|
||||
(b) measurement replaces a guess, or (c) a WHAT is added/removed in
|
||||
§1. Each score should keep its one-line rationale in the table above.
|
||||
|
||||
If a renderer rejects the `tikz` fence, the file is still readable as
|
||||
source — the placement comments name each WHAT, HOW, and cell. The
|
||||
perception-scores table above is the human-readable fallback for the
|
||||
right-hand zone of the diagram.
|
||||
Reference in New Issue
Block a user