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Quick answers
When should I pick Org chart?
When the story is: reporting lines, committee structure, project roles.
When should I avoid Org chart?
Skip it in cases like: work actually flows sideways across a matrix.
Who invented or popularised it?
Daniel McCallum’s 1854 New York & Erie railroad diagram
What does it encode?
parent-child placement of nodes in a tree
Is it OK in ads?
Yes if one claim is visible at a glance in Meta, Google and retail print; otherwise link to a full figure.
Will a teacher accept it?
Yes for lab reports and poster boards if axes, units and a source line are present.
Org chart encodes values as parent-child placement of nodes in a tree. Daniel McCallum’s 1854 New York & Erie railroad diagram.
In reports, ads and assignments it fits reporting lines, committee structure, project roles. Skip it when work actually flows sideways across a matrix.
Principles
- Encoding — The core mark of Org chart is parent-child placement of nodes in a tree.
- History — Daniel McCallum’s 1854 New York & Erie railroad diagram
- Fit — reporting lines, committee structure, project roles
- Shared baseline — The eye compares length and position more accurately than area.
- Audience — PowerPoint, Excel or Google Sheets and Meta, Google and retail print share the same geometry.
Misconceptions
- Pretty equals true — Decoration rarely persuades; it slows reading.
- 3-D helps — Perspective distortion wrecks comparison. Keep it flat.
- More series is richer — Do not stack stories. One Org chart, one claim.
- Default palette is fine — Rainbow defaults fail color-blind viewers and grey print. Change Excel or Google Sheets defaults.
Why it matters
- Work — Work: reporting lines, committee structure, project roles. Readable in four minutes in PowerPoint.
- Ads — Ads: one number and one shape speak first in Meta, Google and retail print.
- School — School: for lab reports and poster boards, pick the form that answers the rubric.
- Craft — Craft: honour parent-child placement of nodes in a tree and decoration falls away.
Org chart: honour parent-child placement of nodes in a tree, and switch when work actually flows sideways across a matrix.