Do not hide the calculated cells

Shared spreadsheets break quietly when people cannot tell which cells are inputs and which cells are calculations. The visible symptom is small: someone types a final number into a formula cell because it looks faster than finding the source row. The later damage is larger: totals stop updating, filters become misleading, and nobody knows when the sheet stopped being trustworthy.

The fix is not only "protect the sheet." A useful shared record should show the role of each area.

A durable layout usually has four zones:

- input cells that people are expected to edit
- calculated cells that should not be typed into
- lookup or reference cells that explain where values come from
- change notes for exceptions, corrections, and one-off overrides

Color can help, but color alone is weak. The sheet also needs labels, frozen headers, and a small correction note where an override happened.

A practical rule: if a calculated value must be overridden, do not replace the formula silently. Put the override in a separate cell, name the reason, and leave the original calculation visible or recoverable.

This matters in event budgets, shared rent splits, clinic shift rosters, classroom grade trackers, volunteer signups, and inventory sheets. The goal is not to make the sheet perfect. The goal is to make accidental damage visible before it becomes the accepted record.

Do not hide the calculated cells

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