流程图把值编码为带标签方框与有向边的拓扑。吉尔布雷斯过程图 1921；后来 ANSI/ISO 符号。
工作报告、广告与作业中适合程序中的分支、循环与交接。若结构是层级或自由头脑风暴时，换一种形式。
Rules
- 规则 1 — Use 带标签方框与有向边的拓扑 as one channel, not two.
- 规则 2 — Direct labels beat a distant legend.
- 规则 3 — Do not hide zero. If you break the axis, say so.
- 规则 4 — Colour encodes category or magnitude, not both.
- 规则 5 — Put the claim in the title, not just “流程图”.
- 规则 6 — Source and period, even in small type.
Palette
- 色板 1 — Categories: distinct hues. Sequences: one hue, changing value.
- 色板 2 — Diverging: a neutral centre, emphasis at both ends.
- 色板 3 — One brand colour plus greys beats a rainbow.
- 色板 4 — Check contrast on a projector and in greyscale print.
Type
- 文字 1 — Tabular figures for numbers. Do not pour body copy into the chart.
- 文字 2 — Titles as sentences; axes as short nouns.
- 文字 3 — For CJK, drop weight one step and leave tracking.
流程图: honour 带标签方框与有向边的拓扑, and switch when 结构是层级或自由头脑风暴时.