Version 23 October 2026. Allow 20–30 minutes for an initial draft; evidence collection takes longer.

This is a blank working tool. Replace the prompts with your own observations; do not treat an unanswered field as evidence.

Before testing

  • Question:
  • Hypothesis:
  • Current baseline and how it was measured:
  • Who is included or excluded?
  • What would change my mind?

Design the test

  • Smallest test:
  • Measure and evidence source:
  • Decision threshold chosen before testing:
  • Time and spending limits:
  • Permission, privacy or safety considerations:
  • Start date and review date:

After testing

  • What actually happened?
  • Observed result and sample size:
  • Missing data or limits:
  • Alternative explanations:
  • Did the test follow the original plan?

Record the decision

  • Continue, change, stop or investigate:
  • Reason linked to the evidence:
  • Next action, owner and review date:
  • What can be shared publicly, and with whose permission?