The document discusses the importance of organizational behavior (OB) in improving managerial effectiveness through understanding interpersonal skills, decision-making, and group dynamics. It highlights the contributions of various disciplines like psychology, sociology, and anthropology to OB, and outlines the challenges and opportunities faced by managers, such as globalization and workforce diversity. The document also touches on the development of an OB model that analyzes independent and dependent variables at individual, group, and organizational levels.