What is Evidence-based Management?

Legal Definition
Evidence-based management (EBMgt or EBM) is an emerging movement to explicitly use the current, best evidence in management and decision-making. Its roots are in empiricism and well developed in evidence-based medicine and evidence based policy. These are quality movements aimed at applying the scientific method to evaluating practice.
-- Wikipedia
Legal Definition
Management decisions based on the best documented scientific evidence currently available. Evidence-based medicine is the basis for evidence-based management as a movement.