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.
When you look at the consumer products generated by many other manufacturers, and even by Braun today, there seem to be an awful lot of camels around. Maybe these companies are too diffuse, have the decision-makers in the wrong places or are continually making the wrong decisions and have no one to stop them. They make products with short-term goals in mind, seducing the eye of the buyer with fashionable colors, sensational curves or exotic surfaces. They may have external designers and, perhaps most significantly, the brand identity is defined by external marketing concerns, rather than design or user-related issues.
The lesson to learn from Braun is that allowing a consistent philanthropic design approach to define a company can be extremely successful if it is executed with discipline, flexibility and good timing combined with hard work and, not least, great talent.