The old-fashioned idea of a good manager is one who is supposed to know all the answers, can solve every problem himself, and can give appropriate orders to his subordinates to carry out his plans... A good modern manager is like a good coach who leads and encourages his team in never-ending quality improvement.
George E. P. BoxRemember that all models are wrong; the practical question is how wrong do they have to be to not be useful.
George E. P. BoxAll models are approximations. Essentially, all models are wrong, but some are useful. However, the approximate nature of the model must always be borne in mind.
George E. P. BoxThe only way to know how a complex system will behave-after you modify it-is to modify it and see how it behaves.
George E. P. BoxFor the theory-practice iteration to work, the scientist must be, as it were, mentally ambidextrous; fascinated equally on the one hand by possible meanings, theories, and tentative models to be induced from data and the practical reality of the real world, and on the other with the factual implications deducible from tentative theories, models and hypotheses.
George E. P. Box