I understand that you're asking a slightly different question than the one I'm answering, but having been involved in the JTBD world, my spidey sense is that you could save yourself a ton of pain if you watch this
TL;DR: A lot of folks (myself included) think that the sort of discovery interview you're describing is somewhere between unhelpful and dangerous. People cannot tell you what their problem is, they can only tell you what they think you want to hear. Yes, I'm generalizing, but it's hard to estimate how many entrepreneur-years have been burned by attempting to solve a problem someone told them that they have.
My suggestion is that you figure out a way to deeply embed yourself in a world or industry, possibly for a few years. The less sexy the domain, the better. Pay close attention, look for solvable problems with your own eyes.
Often there are opportunities hiding in plain sight that people don't see because there's an entrenched "way things are done". But frankly, you have no business disrupting how soup gets canned if you have never worked in a soup canning plant. Don't bring on an industry expert as a startup co-founder; be the industry expert.
https://www.youtube.com/watch?v=RQjBawcU_qg
and maybe read this (optional)
https://therewiredgroup.com/case-studies/milkshakes/
TL;DR: A lot of folks (myself included) think that the sort of discovery interview you're describing is somewhere between unhelpful and dangerous. People cannot tell you what their problem is, they can only tell you what they think you want to hear. Yes, I'm generalizing, but it's hard to estimate how many entrepreneur-years have been burned by attempting to solve a problem someone told them that they have.
My suggestion is that you figure out a way to deeply embed yourself in a world or industry, possibly for a few years. The less sexy the domain, the better. Pay close attention, look for solvable problems with your own eyes.
Often there are opportunities hiding in plain sight that people don't see because there's an entrenched "way things are done". But frankly, you have no business disrupting how soup gets canned if you have never worked in a soup canning plant. Don't bring on an industry expert as a startup co-founder; be the industry expert.