What it is for:A hypothesis test is a small, planned check of one assumption your idea depends on. You leave with one assumption checked against reality, a result you agreed to trust in advance, and a written decision to continue, change or stop.
Who it helps:Teams whose idea depends on a belief nobody has checked, and who need a fair way to settle an argument about whether it will work.
When to use it
Your idea depends on a belief nobody has checked, and building it would take real time or money.
An assumption map has shown you which belief is both important and uncertain.
The team keeps arguing about whether something will work and needs a fair way to settle it.
How to use it
Pick the most important, least evidenced assumption.
Rewrite it as a testable statement with a who, a what and a how much.
Choose the smallest test that shows what people do, not what they say.
Write the pass and fail lines before you start, then run the test as planned.
Record the result next to the criterion and decide: continue, change or stop.
Tip:Test one assumption at a time so you know what the result means.
Credits and sources:Original Tiremesù worksheet and wording. Further reading: 18F Methods https://github.com/18F/methods/tree/main/_methods
Full guide and film:https://www.tiremesu.com/guides/hypothesis-test
