Product Experiment Design Tool — illustrative example

INPUT
Design a formative experiment for the hypothesis that previewing changed rows reduces incorrect approvals. Use comparable invoice-review tasks, current and proposed views, and record correct completion plus incorrect approvals.

RESULT
Hypothesis: the preview makes changed rows easier to identify before approval.
Comparison: current view versus proposed preview on comparable tasks.
Primary observation: incorrect approvals per review attempt.
Additional observations: correct completion and time needed to finish.
Controls: keep task difficulty and instructions comparable; vary order to reduce a simple practice effect.
Decision: investigate whether observed differences support further testing; sample size and evaluation window must be agreed before running the study.

REVIEW
Define the hypothesis, measurement and interpretation before running an experiment. Consider what result would change the decision, not only what would confirm the idea.

This is a teaching example, not a live execution record.