Once you see that an answer is not serving its question properly anymore, it should be tossed away. It's just their natural life cycle.
They usually kick and scream, raising one hell of a ruckus when we ask them to leave. Especially when they have been with us for a long time.
You see, too many actions have been based on those answers. Too much work and energy invested on them. They feel so important, so full of themselves. They will answer to no one. Not even to their initial question!
The hardest thing about customer interviews is knowing where to dig. An effective interview is more like a friendly interrogation. We don’t want to learn what customers think about the product, or what they like or dislike — we want to know what happened and how they chose... To get those answers we can’t just ask surface questions, we have to keep digging back behind the answers to find out what really happened.
I’m a historian of innovation. I write mostly about the causes of Britain’s Industrial Revolution, focusing on the lives of the individual innovators who made it happen. I’m interested in everything from the exploits of sixteenth-century alchemists to the schemes of Victorian engineers. My research explores why they became innovators, and the institutions they created to promote innovation even further.
To truly increase innovation, I think we need policies focused on what goes on even further upstream, before much of the supply of new inventors is inevitably siphoned off into distractions, dead ends, and failure. Most policies inevitably have a marginal effect, but a slight expansion of the incoming swell of potential inventors can have a much greater impact than fiddling with the incentives of the few hundred who’ve already somewhat made it to the final trickle. Increase the strength of the flow upstream, and everything downstream flows the faster too.