The 'Sean Ellis' Test

Evidence Strength*:

2 Time/Cost:

3 skills Required:

Research, Marketing, Product Design

How disappointed would you be if you could no longer use our product?

Quick how-to guide:

Named after Sean Ellis, growth hacking expert, you ask recurring customers the question: "How disappointed would you be if you could no longer use our product?".

Find recurring users and ask them the question.
If over 40% say they would miss, Sean argues you have achieved Product/Market Fit.
A follow up to a 40%+ score could be a Net Promotor Score survey.

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*Evidence Strength is the expected value of evidence the experiment will obtain. Measure this against the time/cost estimation to decide which experiments to undertake. Rating is between 1-5 and this is a rough estimate. Your business situation and market is unique. For more help or advice get in touch.