Design the Experiment Before the Chart
Choose experiment design decisions that protect interpretability and business action.
The test request Mina is asked to test a checkout banner on all traffic with a one-day readout. Without design choices up front, the result can be positive, negative, or uninterpretable depending on how the team slices it. Experiment discipline Unit, metric, guardrail, window, rule A test teaches only when the comparison is clean enough and the action rule is known before results arrive. Shortcut Launch variant, wait a day, compare total orders. A result the business can act on without post-hoc argument. Experiment design is decision design under controlled variation. 01 Assignment 02 Metrics 03 Now you try Choose…
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