Borrowed from the good folks over at Startup Core Strengths
Write a hypothesis that contains a single risky assumption that can be tested and measured
Explain how you will test your hypothesis at a high level. Make sure the methodology is suitable.
Choose a success metric deep enough in the funnel to be meaningful (e.g. not “clicks”) and shallow enough that you can get your results quickly. If possible, what are those numbers before the experiment has begun? Include screenshots.
Make a prediction. Make it a specific numeric prediction. Everyone involved should make bets on what they think will happen.
Conduct a pre-mortem. What are the reasons this experiment might fail? Think of second-order effects that can have an impact.
What action might you take?