The most probable assumption is that no currently working 'business theory' will be valid 10 years hence.
Peter DruckerQuality in a product or service is not what the supplier puts in. It is what the customer gets out and is willing to pay for. A product is not quality because it is hard to make and costs a lot of money, as manufacturers typically believe. This is incompetence. Customers pay only for what is of use to them and gives them value. Nothing else constitutes quality.
Peter DruckerThe better a man is, the more mistakes he will make, for the more new things he will try. I would never promote to a top-level job a man who was not making mistakes...otherwise he is sure to be mediocre.
Peter DruckerThe final test of greatness in a CEO is how well he chooses a successor and whether he can step aside and let the successor run the company.
Peter DruckerInnovative efforts should never report to line managers charged with responsibility for ongoing operations. The new project is an infant and will remain one for the foreseeable future, and infants belong in the nursery. The 'adults', that is, the executives in charge of existing businesses or products will have neither the time nor understanding for the infant.
Peter Drucker