Sometimes a surprise is mysterious, without a clear explanation. Managers must be responsive to immediate conditions , and adjust their expectations and reactions accordingly. A good manager uses many models, some of them are scientific, some are intuitive. This is a danger that all of us must monitor in our management. We may become overconfident, or complacent.
Objectivity also is a way to avoid responsibility for results of one's actions.
Many models are codified into regulations and laws, which can be very destructive although written with good intentions. Regulations and laws may interfere with better intuitive decisions in certain circumstances. The answer is, No, management uses science, but is never scientific. Good managers plan with expectations, monitor the actual results and conditions, and revise their plans accordingly. When appropriate scientific models are not available, intuition derived from experience serves as the basis for decisions and planning.