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The outside-in discipline requires that you have an explicit customer-based reason for everything you do in the marketplace. Managers need to create what I call "customer pictures," verbal descriptions of customers that highlight the key customer characteristics and make those customers come alive. Although managers never know as much about customers as they want and need to know, the outside-in discipline requires that they construct customer pictures anyway, basing the pictures on whatever hard data they have plus hypotheses and intuition.
