Data Table Design

A table is not a spreadsheet dump. Every formatting choice either helps or hinders the reader's ability to compare, rank, and interpret - and a misaligned or falsely precise table gets numbers misread in the meetings that matter. The output of this skill is a table a reader can extract the right conclusion from in under ten seconds.

Operating procedure

Step 1: Gather inputs

1. The table as it stands (or the raw data), and where it will live: slide, printed report, dashboard, or scrolling web page - the medium changes the density rules in Step 5.
2. The reader's single most likely question. Every subsequent decision serves it. If the owner cannot name the question, that is the first problem to fix.
3. The action the reader takes from the table. Columns that inform no comparison or action are candidates for deletion.
4. Units and the true precision of the data - what the collection method actually supports, not what the export prints.

Step 2: Set alignment