"It was the customers’ situation that determined why they bought."

"WHAT’S THE JTBD?
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From the data Morgan has given us, I’d say that the struggle for progress is:
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More about: My family having quality food, taking away the stress from grocery shopping, more family time, convenience
Less about: Grocery shopping online / supermarket / local shop, supporting the local community
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Again, any kind of task or activity associated with grocery shopping is just a solution for a JTBD - it's not part of the JTBD itself.
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The progression of solutions in this case study helps us understand what customers do and don’t value. In the beginning, parents were fine visiting multiple shops. They were willing to trade convenience for food quality. But when their family grew, saving time and reducing stress became more important to them. This is how we know that their struggle, their JTBD, is heavily related to finding a way to solve that stress and to save time.
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This case study also demonstrates how customer needs or wants change over time, and don't belong to the customer. We may think we’re measuring a need, but we’re really just measuring what a customer does or doesn’t like about a particular solution. We must keep in mind that a “need” is represents an interaction between the customer, their struggle, and whatever product they’ve hired for their JTBD. If one of those parts changes, then customers’ needs will change along with it.
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Don’t depend on demographics. At first, Morgan thought he was making a product for young, urban professionals. This demographic certainly did represent some of his customers. However, it turned out that his most dedicated customers were families. Not only that, they almost always had two or more young children.
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We can learn from this that demographic thinking can be misleading. It was the customers’ situation - not personal characteristics - that determined why they bought.
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Know the difference between customers who switch because they are unhappy with your solution and those who switch because changing life circumstances prompt a redefinition of progress."

Trechos retirados de "When coffee & kale compete" de Alan Klement.