This document summarizes key concepts from Chapters 12-18 related to organizing. It discusses principles of authority and span of management. It also covers topics like departmentalization, delegation of authority, reorganization, committees, quality management, and the informal organization. The main takeaways are that organizing involves dividing work, grouping activities, and allocating authority in a way that maximizes efficiency while empowering employees. Reorganization and continuous improvement are important to adapt to changes over time. Both formal and informal structures within an organization must be understood and leveraged to achieve goals.