This document provides an overview of theories and approaches to organizational change and leadership. It discusses:
1) Organizational change as a concept, with organizations viewed as open systems impacted by external PEST factors that can trigger internal changes.
2) Theories of organizational change including Lewin's 3-stage model of unfreezing, changing, and refreezing. Critics argue planned change models don't account for human factors and resistance to change.
3) The importance of leadership in change initiatives, with leaders needing knowledge of the organization and environment to help drive change and address barriers like resistance.