This document discusses the definitions and levels of management. It defines management as the process of designing and maintaining an environment where individuals work together to achieve objectives effectively and efficiently. It distinguishes between entrepreneurs and managers, noting that entrepreneurs take on risks as owners while managers are paid employees. Management involves both science and art - it has principles that can be tested scientifically but also requires personal skills and creativity in application. Management occurs at three levels - top management makes policies, middle management implements plans, and lower management directly supervises workers.