The most probable assumption is that no currently working 'business theory' will be valid 10 years hence.
Peter DruckerInnovation opportunities do not come with the tempest but with the rustling of the breeze.
Peter DruckerTo arrive at the definition of the problem he must begin by finding the 'critical factor'. This is the element (or elements) in the situation that has to be changed before anything else can be changed, moved, acted upon.
Peter Drucker