Customer interview questions to identify buyer motivations
One way to understand someone's Job to Be Done is to interview them. The interviewee's answers will help you understand the context of the actual buying decision.
Here are some sample questions you can start with:
When did you purchase the product?
Where were you?
What time of day was it? (daytime/ nighttime?)
What was the weather like?
Was anyone else with you at the time?
How did you purchase the product?
Did you buy anything at the same time?
Before you bought this, what were you doing to solve the problem?
What other solutions did you consider?
P.S. If you don't yet have a product, you can ask a competitor's customers these questions.