The Cardinal Rule — Ask About the Past, Not the Future
The single most common mistake in customer interviews is asking hypothetical future-intent questions: "Would you use this?" "Would you pay for this?" "Do you think this is a good idea?" People are naturally polite and aspirationally optimistic — they will say yes to almost anything. What people say they will do and what they actually do are completely different.
Instead, ask about past behaviour: "Tell me about the last time you had to deal with [problem]. Walk me through exactly what happened. What did you try? What did you use? How much did it cost you in time or money?" Past behaviour is real data. Future intent is fiction.
The Mom Test — Three Rules for Non-Leading Questions
Rob Fitzpatrick's "The Mom Test" is required reading for every founder conducting discovery. His three rules:
- Talk about their life, not your idea. The interview is about understanding their world — their problems, workflows, and frustrations — not about getting validation for yours.
- Ask about specifics in the past, not generics or opinions about the future. "Have you ever tried to solve this?" beats "Would you ever want to solve this?"
- Listen — don't pitch. If you're talking more than 30% of the time, you're doing it wrong. Your job is to ask and listen, not to convince.
The Jobs-to-be-Done Framework
Clayton Christensen's Jobs-to-be-Done (JTBD) framework reframes the discovery question: customers don't buy products — they "hire" products to get a job done. Your discovery interviews should uncover the functional, social, and emotional jobs your customers are trying to accomplish.
- Functional job: "When I am [situation], I want to [motivation] so I can [outcome]."
- Emotional job: What does the customer feel while struggling with the problem? What do they want to feel after solving it?
- Social job: How does solving/not solving this problem affect how they appear to peers, bosses, or customers?
India-specific JTBD insight: in Indian B2B contexts, the social job is often more important than the functional job. A CFO adopting a new finance tool is not just solving a reporting problem — they are signalling modern management practices to the board and reducing personal risk from audit findings. Discovery questions must surface these social motivations.