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Interview
Key Informant Counterfactual Judgment
Experts with knowledge of the initiative or community are consulted to provide their predictions about what would have happened without the product or change. The activity involves structured questioning of these external individuals to gather their informed opinions.
When This Method Fits
Typical duration
Days – Weeks
Typical cost
Low – Medium
Fidelity level
Talk Only
Stage
Implementation
Hypothesis type
Outcome
Goal type
Deepen product-market fit, Maximize societal impact, Drive corporate innovation / R&D, Improve operational efficiency
Randomization
N/A
Study design
Individual case report
Minimum units needed
3
Causal rigor
Min 1 · Max 2 / 5
1Best Fit When
Best when a real comparison group isn't available or ethical, and you need a credible, informed substitute for the counterfactual.