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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.
Mistakes
- Failure modes 1 — work actually flows sideways across a matrix
- Failure modes 2 — 3-D pies and perspective bars
- Failure modes 3 — Dual axes that fake a correlation
- Failure modes 4 — Truncated axes that shout a small delta
- Failure modes 5 — Legend only, no direct labels
- Failure modes 6 — Missing source, unit or period
Fixes
- Fixes 1 — Return to reporting lines, committee structure, project roles.
- Fixes 2 — Flat, one axis, direct labels.
- Fixes 3 — Color-blind-safe palette plus pattern.
- Fixes 4 — Rewrite the title as a claim and add a source line.
Org chart: honour parent-child placement of nodes in a tree, and switch when work actually flows sideways across a matrix.