Spreadsheets that don't break when someone else opens them.
Most spreadsheet advice teaches tricks. Column A teaches structure — the small set of rules that decide whether a file still works six months from now, in someone else's hands.
| Description | Amount | |
|---|---|---|
| 12 | Client hosting | 412.00 |
| 13 | Design software | 228.40 |
| 14 | Contractor invoice | 1,850.00 |
| 15 | Travel | 306.25 |
| 16 | Office supplies | 94.00 |
| 19 | Total | 3,918.65 |
The dangerous errors are the ones that don't turn red.
A file works perfectly for the person who built it. Then it's shared, inherited, edited by four people — and six months later it produces a number nobody can explain and nobody can check.
Silent failure
No error message ever appeared. The formula still returns a number — just not the right one.
Key-person risk
If only one person can run the file, it isn't a tool. It's a dependency on a human being.
Structure, not tricks
Shortcuts expire. The way a file is built decides whether it survives being handed over.
The Spreadsheet Health Check
Ten structural checks that tell you whether your team's critical files would survive the person who built them leaving.
- Three checks marked critical, because they fail silently
- Run it on one file in about fifteen minutes
- No sign-up wall beyond your email, no upsell inside it
Get it free
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One structural idea and one free template, every Thursday. Unsubscribe whenever.
If you're the only one who can run it, it isn't a tool. It's a dependency on you.
One rule a week, worked through on a real spreadsheet — plus the template that demonstrates it.