Conductors do not know how the oboe does its work, but they know what the oboe should contribute.
Peter DruckerInformation is the manager's main tool, indeed the manager's capital, and it is he who must decide what information he needs and how to use it.
Peter DruckerWhat people in business think they know about the customer and market is likely to be more wrong than right...the customer rarely buys what the business thinks it sells him.
Peter Drucker