One Chart, One Message
The first draft of the Quick Checkout review had a pie chart of traffic sources, two line charts sharing a double axis, and a table of forty numbers. The leadership team looked at it for five minutes and remembered none of it. During exploration you draw charts to find something. When you present, each chart has a different job: to make one point so clearly that nobody can miss it.
The rule
Write the one sentence first; then draw only what proves it.
The sentence decides the chart, because each kind of message rests on a different comparison:
| The message is about… | Chart that fits |
|---|---|
| Ranking categories ("Pune is slowest") | Bar chart, sorted |
| Change over time ("late share fell every week") | Line chart |
| Shape of a distribution ("most baskets are ₹300–₹800") | Histogram or box plot |
| Relationship ("later deliveries, lower ratings") | Scatter plot |
| Parts of a whole, with only two or three parts | Stacked bar, or a pie at most |
Then make the chart say the sentence:
- Title with the takeaway: "Quick Checkout converts about 1 point better" beats "Conversion by arm".
- Highlight one thing: the series that matters in a strong colour, everything else in grey.
- Label directly on the bars or line ends instead of making readers decode a legend.
- Show uncertainty when it matters: an error bar or shaded band for the interval.
- Start bar axes at zero. A bar's length is its message; cutting the axis at 9% makes 10% and 11% look like one bar is double the other. Line charts may zoom in, because they encode change, not length.
The shortcut
Go message → comparison → chart → title, in that order, and delete anything that does not serve the message.
Message
"Late evening deliveries fell every week after we added riders."
A quick test before you present: cover the title, look at the chart for five seconds, and say what it shows. If what you say is not the title, the chart needs work.
Drills
Answer fast — trust the rule.
Which chart best shows "Pune has the highest late-delivery share of our five cities"?
Which title works best for the Quick Checkout result chart?
A bar chart's axis starts at 9%, so 10% and 11% bars look like one is double the other. What is wrong?
Which chart shows the relationship between minutes late and delivery rating?
Remember
- Write the one sentence first, then draw only what proves it.
- Message → comparison → chart → takeaway title.
- Trap: cut bar axes, legends to decode, and charts that show everything and say nothing.