# Business assumption testing: original decision worksheet

Attribution: Jon Bishop. CC BY 4.0. Framework source: https://www.strategyzer.com/library/the-test-card

This is an original worksheet, not a copy of the source artifact.

## Decision

What decision must this exercise inform? Who owns it? What evidence would change it?

## Inputs

Write the claim, what observation could contradict it, the population and the smallest informative test.

For each input, record: observation | source | date | affected population | confidence | unresolved question.

## Application

1. Define one concrete decision and comparison period.
2. Record evidence separately from estimates.
3. Apply the method and inspect the assumptions that drive the result.
4. State the next observation or test and its decision rule.

## Worked example — fictional

Fictional: five interviews may reveal repeated procurement barriers. They cannot establish that 60% of all target accounts share that barrier.

## Limits

The inspected source redirects to a broader testing course. This workbook is an original evidence-planning exercise, not the publisher’s Test Card.

## Output

Decision: ___
Evidence supporting it: ___
Contradictory or missing evidence: ___
Next action and owner: ___
Revisit when: ___